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5768 Commits

Author SHA1 Message Date
Dan Gohman
d0da06c817 Fix FastISel to recognize that the last block in the function does 
not have a fall-through successor.

llvm-svn: 55033
 2008-08-20 01:17:01 +00:00
Dan Gohman
472f4b49b6 Fix a leak in the FastISel code that Chris pointed out. 
llvm-svn: 55031
 2008-08-20 00:56:17 +00:00
Dan Gohman
023bedddc4 Add support for running SelectionDAG if FastISel fails. This is under 
a command-line option, so that the default behavior is an abort, which
is useful for exposing code that isn't supported yet.

llvm-svn: 55028
 2008-08-20 00:47:54 +00:00
Dan Gohman
f298c31918 Fix FastISel to recognize unhandled operands, such as constants 
that aren't available as virtual registers (for now).

llvm-svn: 55026
 2008-08-20 00:35:17 +00:00
Dan Gohman
455abe7436 Add FastISel support for floating-point operations. 
llvm-svn: 55021
 2008-08-20 00:23:20 +00:00
Dan Gohman
ce636764de Add FastISel support for several more binary operators. 
llvm-svn: 55020
 2008-08-20 00:11:48 +00:00
Dan Gohman
1b18b91296 Add code to call FastISel, and a command-line option to enable it. 
llvm-svn: 55015
 2008-08-19 22:33:34 +00:00
Dan Gohman
25efe2087b Support unconditional fall-through branches in FastISel. 
llvm-svn: 55014
 2008-08-19 22:31:46 +00:00
Owen Anderson
5325218d4b Allow the fast-path spilling code to attempt folding, but still leaving out remat and splitting. 
llvm-svn: 55012
 2008-08-19 22:12:11 +00:00
Dan Gohman
7a23fc0fb0 Use the BuildMI overload that sets up a destination register 
instead of the one that doesn't and then adding it manually.

llvm-svn: 55006
 2008-08-19 20:46:54 +00:00
Dan Gohman
564f3c6773 Handle the case where target-specific fastisel code doesn't have 
a desired opcode.

llvm-svn: 55005
 2008-08-19 20:43:22 +00:00
Owen Anderson
b110ebd37d The fast-path still needs to set kill markers and spill/restore points as appropriate. 
With this patch, all of MultiSource/Applications and all of SPEC2000/2006 pass with
the SimpleSpiller and this fast-path enabled.

llvm-svn: 55000
 2008-08-19 20:09:52 +00:00
Gordon Henriksen
b7b9342e24 Delete a dead field. 
llvm-svn: 54995
 2008-08-19 17:09:26 +00:00
Gordon Henriksen
c4e022d917 [PR2327] Leverage TargetRegisterInfo to compute frame offsets for GC metadata. 
llvm-svn: 54994
 2008-08-19 17:06:35 +00:00
Chris Lattner
9f588f11f4 don't use the result of WriteTypeSymbolic or WriteAsOperand. 
llvm-svn: 54978
 2008-08-19 04:44:30 +00:00
Owen Anderson
c68a43890f Make SimpleSpiller respect subregister indices. 
llvm-svn: 54968
 2008-08-19 01:05:33 +00:00
Owen Anderson
94b85d88da Add a flag to enable the fast spilling path. 
llvm-svn: 54958
 2008-08-19 00:17:30 +00:00
Owen Anderson
f7f555763d Fix a few more bugs: 
1) Assign stack slots to new temporaries.
  2) Don't insert an interval into the return vector more than once.

llvm-svn: 54956
 2008-08-18 23:41:04 +00:00
Owen Anderson
0c22b6d22c Fix several bugs in the new fast-path: 
1) Remove an incorrect assertion.
  2) Set the stack slot weight properly.
  3) Resize the VirtRegMap when needed.

llvm-svn: 54949
 2008-08-18 21:20:32 +00:00
Owen Anderson
c25fc6fc35 Clients of addIntervalForSpills expect the added intervals to be returned sorted by starting index. 
llvm-svn: 54939
 2008-08-18 19:52:22 +00:00
Owen Anderson
751ff13625 Simplify the fast-patch interval spilling by using MachineRegisterInfo::reg_iterator. 
llvm-svn: 54930
 2008-08-18 18:38:12 +00:00
Owen Anderson
39bb486001 Resurrect some ancient code to add spill ranges without attempting folding, remat, or splitting. This code has been updated to current APIs 
in so far as it compiles and, in theory, works, but does not take advantage of recent advancements.  For instance, it could be improved by using
MachineRegisterInfo::use_iterator.

llvm-svn: 54924
 2008-08-18 18:05:32 +00:00
Bill Wendling
12569b3697 Don't hoist instructions that have implicit uses or defines. Before, it was 
hoisting out some "test" and "cmp" instructions. This was obvious badness.

llvm-svn: 54908
 2008-08-18 00:33:49 +00:00
Gordon Henriksen
0a5e079b8e Don't require Registry specializations to define random static variables. 
llvm-svn: 54902
 2008-08-17 19:08:34 +00:00
Gordon Henriksen
a9ff400fa9 Drop an unnecessary include. 
llvm-svn: 54901
 2008-08-17 18:54:05 +00:00
Gordon Henriksen
2cc861a6c1 Rename some GC classes so that their roll will hopefully be clearer. 
In particular, Collector was confusing to implementors. Several
thought that this compile-time class was the place to implement
their runtime GC heap. Of course, it doesn't even exist at runtime.
Specifically, the renames are:

  Collector               -> GCStrategy
  CollectorMetadata       -> GCFunctionInfo
  CollectorModuleMetadata -> GCModuleInfo
  CollectorRegistry       -> GCRegistry
  Function::getCollector  -> getGC (setGC, hasGC, clearGC)

Several accessors and nested types have also been renamed to be
consistent. These changes should be obvious.

llvm-svn: 54899
 2008-08-17 18:44:35 +00:00
Gordon Henriksen
caf246344c Don't instantiate GC metadata for declarations. 
llvm-svn: 54895
 2008-08-17 16:18:50 +00:00
Anton Korobeynikov
f1b2880420 Fix merge error 
llvm-svn: 54891
 2008-08-17 13:56:03 +00:00
Anton Korobeynikov
1866ca5736 Move all assembler printing related stuff into new libAsmPrinter 
llvm-svn: 54885
 2008-08-17 13:53:04 +00:00
Anton Korobeynikov
19f5435928 Factor out asmprinters from collector interface. 
llvm-svn: 54884
 2008-08-17 13:52:35 +00:00
Gordon Henriksen
e51c9eb75e Factor GC metadata table assembly generation out of Collector in preparation for splitting AsmPrinter into its own library. 
llvm-svn: 54881
 2008-08-17 12:56:54 +00:00
Gordon Henriksen
4d2eb98d42 Factor GC metadata table assembly generation out of Collector in preparation for splitting AsmPrinter into its own library. 
llvm-svn: 54880
 2008-08-17 12:08:44 +00:00
Chris Lattner
c0610874cc Rework the routines that convert AP[S]Int into a string. Now, instead of 
returning an std::string by value, it fills in a SmallString/SmallVector
passed in.  This significantly reduces string thrashing in some cases.

More specifically, this:
 - Adds an operator<< and a print method for APInt that allows you to 
   directly send them to an ostream.
 - Reimplements APInt::toString to be much simpler and more efficient
   algorithmically in addition to not thrashing strings quite as much.

This speeds up llvm-dis on kc++ by 7%, and may also slightly speed up the
asmprinter.  This also fixes a bug I introduced into the asmwriter in a
previous patch w.r.t. alias printing.

llvm-svn: 54873
 2008-08-17 07:19:36 +00:00
Anton Korobeynikov
436f708112 Move SLEB/ULEB size calculation routines from AsmPrinter to TargetAsmInfo. This makes JIT asmprinter-free. 
llvm-svn: 54843
 2008-08-16 12:57:46 +00:00
Owen Anderson
426c49472d Convert several std::vectors over to SmallVector, and use reserve() as appropriate for cases where std::vector is still used. 
llvm-svn: 54820
 2008-08-15 18:49:41 +00:00
Owen Anderson
d3c6cbed61 Use SmallSet instead of std::set to save allocations. 
llvm-svn: 54810
 2008-08-14 23:41:38 +00:00
Owen Anderson
fd1d9b5c38 Move MachineInstr::getOpcode inline. 
llvm-svn: 54807
 2008-08-14 23:25:30 +00:00
Owen Anderson
600a8ca0d5 Convert uses of std::vector in TargetInstrInfo to SmallVector. This change had to be propoagated down into all the targets and up into all clients of this API. 
llvm-svn: 54802
 2008-08-14 22:49:33 +00:00
Dan Gohman
6b146d5ec3 Make FastISel's constructor protected, and give it a destructor. 
llvm-svn: 54793
 2008-08-14 21:51:29 +00:00
Owen Anderson
af9e467544 Remove more uses of std::set. 
llvm-svn: 54787
 2008-08-14 21:01:00 +00:00
Dan Gohman
b0f5e18201 Improve support for vector casts in LLVM IR and CodeGen. 
llvm-svn: 54784
 2008-08-14 20:04:46 +00:00
Owen Anderson
169e5e5b99 Speed up addRegisterDead by adding more fast checks before performing the expensive 
subregister query, and by increasing the size of the subregister hashtable so
that there are fewer collisions.

llvm-svn: 54781
 2008-08-14 18:34:18 +00:00
Dan Gohman
027326ba3e Use empty() instead of begin() == end(). 
llvm-svn: 54780
 2008-08-14 18:13:49 +00:00
Owen Anderson
34aee11210 Get rid of a use of std::map. 
llvm-svn: 54770
 2008-08-13 23:36:23 +00:00
Dan Gohman
db5b503d60 Fix a bogus srem rule - a negative value srem'd by a power-of-2 
can have a non-negative result; for example, -16%16 is 0. Also,
clarify the related comments. This fixes PR2670.

llvm-svn: 54767
 2008-08-13 23:12:35 +00:00
Owen Anderson
de29970fc6 Expunge the last uses of std::map from LiveIntervals. 
llvm-svn: 54766
 2008-08-13 22:28:50 +00:00
Owen Anderson
550fc15832 Move r2iMap_ over to DenseMap from std::map. 
llvm-svn: 54765
 2008-08-13 22:08:30 +00:00
Dan Gohman
096cdc6059 Allow SelectionDAG to create EXTRACT_VECTOR_ELT nodes with 
non-constant indices. Only a few of the peephole checks require
a constant index.

llvm-svn: 54764
 2008-08-13 21:51:37 +00:00
Owen Anderson
28f2e658f1 Make the allocation of LiveIntervals explicit, rather than holding them in the r2iMap_ by value. This will prevent references to them from being invalidated 
if the map is changed.

llvm-svn: 54763
 2008-08-13 21:49:13 +00:00
Dan Gohman
4b1b033f89 Initial checkin of the new "fast" instruction selection support. See 
the comments in FastISelEmitter.cpp for details on what this is.
This is currently experimental and unusable.

llvm-svn: 54751
 2008-08-13 20:19:35 +00:00
Dan Gohman
9e27bed4f0 Rename SelectionDAGISel's FastISel to Fast, to begin to make 
room for the new FastISel instruction selection code.

llvm-svn: 54749
 2008-08-13 19:47:40 +00:00
Owen Anderson
9007c9afde Get rid of unused variable. 
llvm-svn: 54742
 2008-08-13 17:44:52 +00:00
Owen Anderson
95ac2ab349 1) Merge entire live intervals instead of parts of them. 
2) Conditionalize temporary insertion if we don't need it.

llvm-svn: 54741
 2008-08-13 17:25:42 +00:00
Dan Gohman
f927e9615f Correct the filename in the top-of-file comment. 
llvm-svn: 54688
 2008-08-12 17:42:33 +00:00
Dan Gohman
a27ed39f05 Take the FrameOffset into account when computing the alignment 
of stack objects. This fixes PR2656.

llvm-svn: 54646
 2008-08-11 18:27:03 +00:00
Gordon Henriksen
051f7c07a9 Fix some typos. Apparently I think C needs a power-of operator. 
llvm-svn: 54574
 2008-08-09 03:48:46 +00:00
Eric Christopher
dcd4752642 Have IRBuilder take a template argument on whether or not to preserve 
names. This can save a lot of allocations if you aren't going to be
looking at the output.

llvm-svn: 54546
 2008-08-08 19:39:37 +00:00
Anton Korobeynikov
8d77445753 Handle visibility printing with all generality. Remove bunch of duplicate code. 
llvm-svn: 54540
 2008-08-08 18:25:07 +00:00
Owen Anderson
8eab9e50dc Reduce the entries in a phi before testing it for deadness, because removing the entries might make it dead. 
llvm-svn: 54535
 2008-08-08 18:00:05 +00:00
Evan Cheng
cc7944b919 Add skeleton of simple basic block instruction selector. 
llvm-svn: 54522
 2008-08-08 07:27:28 +00:00
Nick Lewycky
19a341cf57 Don't crash printing the asm for a ConstantExpr PtrToInt just because the int 
is narrower than the pointer. This testcase emits:

  .byte (((17) - 16) & 255)

llvm-svn: 54517
 2008-08-08 06:34:07 +00:00
Bruno Cardoso Lopes
2284374fcc Add the remaining fp_round libcalls: 
FPROUND_F80_F32, FPROUND_PPCF128_F32, 
FPROUND_F80_F64, FPROUND_PPCF128_F64

Support for soften float fp_round operands is added, Mips 
needs this to round f64->f32.

Also added support to soften float FABS result, Mips doesn't 
support double fabs results while in 'single float only' mode.

llvm-svn: 54484
 2008-08-07 19:01:24 +00:00
Owen Anderson
1893d0f813 Do a dominator walk when scheduling copies, rather than a DFS on the CFG. Also, fix a few problems when creating 
live intervals for temporaries created by phi elimination.

llvm-svn: 54483
 2008-08-07 18:28:07 +00:00
Dan Gohman
74fa421281 Re-enable elimination of unnecessary SUBREG_TO_REG instructions in 
LowerSubregs, and fix an x86-64 isel bug that this exposed.

SUBREG_TO_REG for x86-64 implicit zero extension is only safe for
isel to generate when the source is known to always have zeros in
the high 32 bits. The EXTRACT_SUBREG instruction does not clear
the high 32 bits.

llvm-svn: 54444
 2008-08-07 02:54:50 +00:00
Evan Cheng
f8a801a9b8 Factor code that finalize PHI nodes, jump tables, etc. out of SelectBasicBlock. No functionality changes. 
llvm-svn: 54438
 2008-08-07 00:43:25 +00:00
Owen Anderson
2975ced4df SDISel's constant branch folding can fold away self-loops, which doesn't result in any dead blocks, but 
rather an incorrect phi input.  Add code to UnreachableMachineBlockElim to get rid of these entries.

llvm-svn: 54432
 2008-08-06 23:16:52 +00:00
Owen Anderson
655eb1a3bc Correct handle cases where two phis are coalesced together, and correct break up the case where two different 
phis want to coalesce with the same vreg.

llvm-svn: 54426
 2008-08-06 22:08:58 +00:00
Owen Anderson
33cf898dff Oops, didn't mean to commit this. 
llvm-svn: 54425
 2008-08-06 20:58:38 +00:00
Owen Anderson
5929d57f67 We don't need to try to coalesce input vregs that are the same as the output vreg. 
llvm-svn: 54422
 2008-08-06 20:29:20 +00:00
Owen Anderson
482d679301 Only trim a live interval if the register is not used after the PHI node. 
llvm-svn: 54421
 2008-08-06 18:36:17 +00:00
Owen Anderson
e95b75bed2 Only remap each VNInfo once when doing renumbering. 
llvm-svn: 54420
 2008-08-06 18:35:45 +00:00
Owen Anderson
e9c3ae9fe4 Fix breakage on ARM/2008-04-10-ScavengerAssert.ll. 
llvm-svn: 54378
 2008-08-05 22:24:40 +00:00
Evan Cheng
a07795a0c3 Fix PR2596: out of bound reference. 
llvm-svn: 54375
 2008-08-05 21:51:46 +00:00
Owen Anderson
acd5487eb9 Correctly handle replacement and removal of PHIs with one incoming register. 
llvm-svn: 54374
 2008-08-05 21:40:45 +00:00
Owen Anderson
11731063b9 Oops, we were already checking for dead phis. Handle this the proper way, then. 
llvm-svn: 54371
 2008-08-05 21:18:51 +00:00
Owen Anderson
dacdf44612 We don't need to update live intervals for dead PHIs. 
llvm-svn: 54369
 2008-08-05 20:51:26 +00:00
Owen Anderson
667d9c95c2 Remove the -disable-correct-folding option, which was ugly and is no longer needed. 
llvm-svn: 54361
 2008-08-05 18:27:54 +00:00
Dan Gohman
de163bb39d Fix several const-correctness issues, resolving some -Wcast-qual warnings. 
llvm-svn: 54349
 2008-08-05 14:45:15 +00:00
Evan Cheng
1b731b8504 Remove #if 0. 
llvm-svn: 54347
 2008-08-05 07:20:57 +00:00
Evan Cheng
754148a2ec Fix PR2568: Fix bug that cause redudant kill marker after its live interval has been extended due to coalescing. 
llvm-svn: 54346
 2008-08-05 07:10:38 +00:00
Owen Anderson
7b5fe60440 Remove unneeded iteration. Thanks to Dan for the feedback. 
llvm-svn: 54337
 2008-08-05 00:30:10 +00:00
Owen Anderson
32ae9380f1 This option doesn't need to be a target option. It can be in SDISel instead. 
llvm-svn: 54336
 2008-08-05 00:27:28 +00:00
Owen Anderson
84fbc312d4 - Fix SelectionDAG to generate correct CFGs. 
- Add a basic machine-level dead block eliminator.

These two have to go together, since many other parts of the code generator are unable to handle the unreachable blocks otherwise created.

llvm-svn: 54333
 2008-08-04 23:54:43 +00:00
Dan Gohman
60ea311ec8 Fix SDISel lowering of PHI nodes to use ComputeValueVTs. 
This allows it to work correctly on aggregate values.
This fixes PR2623.

llvm-svn: 54331
 2008-08-04 23:42:46 +00:00
Dan Gohman
af429b3e52 Fix SDISel lowering of zeroinitializer and undef to use ComputeValueVTs. 
This allows it to work correctly on nested aggregate values.
This fixes PR2625.

llvm-svn: 54330
 2008-08-04 23:30:41 +00:00
Dale Johannesen
f669e7c14f Add a flag to disable jump table generation (all 
switches use the binary search algorithm) for
environments that don't support it.  PPC64 JIT
is such an environment; turn the flag on for that.

llvm-svn: 54248
 2008-07-31 18:13:12 +00:00
Dan Gohman
f691fc703d Improve dagcombining for sext-loads and sext-in-reg nodes. 
llvm-svn: 54239
 2008-07-31 00:50:31 +00:00
Dan Gohman
926a91d664 Move SelectionDAG::viewGraph() out of line; as an inline function 
it isn't always visible to gdb.

llvm-svn: 54228
 2008-07-30 18:48:53 +00:00
Dan Gohman
4ca56a8993 Don't look for leaf values to store when lowering stores of 
empty structs. This fixes PR2612.

llvm-svn: 54226
 2008-07-30 18:36:51 +00:00
Owen Anderson
4e5db8d80f Use existing LiveInterval methods to simplify live interval merging. Thanks to Evan for pointing these out. 
llvm-svn: 54225
 2008-07-30 18:27:35 +00:00
Owen Anderson
e6dca3efcb Value numbers whose def index is a special sentinel value should not be remapped. 
llvm-svn: 54218
 2008-07-30 17:42:47 +00:00
Owen Anderson
377ad6cb31 More fixes for corner cases when remapping live range indices. 
llvm-svn: 54186
 2008-07-30 00:22:56 +00:00
Owen Anderson
6147af0f8c When merging live intervals, we also need to merge in any live ranges that are inputs to two-address instructions 
that themselves define a range we already care about.

llvm-svn: 54185
 2008-07-30 00:21:16 +00:00
Owen Anderson
ab575176fc When merging a PHI operand's live interval into the PHI's live interval, we need to merge over all liveranges in 
the operand's interval that share the relevant value number, not just the range that immediately precedes the PHI.

llvm-svn: 54174
 2008-07-29 21:17:08 +00:00
Owen Anderson
bebb8e5d20 Don't decrement the BB remap when we don't need to. 
llvm-svn: 54173
 2008-07-29 21:15:44 +00:00
Duncan Sands
c3d73fbfc0 Fix PR2609. If a label is deleted, then it needs 
to be marked invalid regardless of whether it is
a debug, an exception handling or (hopefully) a
GC label.

llvm-svn: 54172
 2008-07-29 20:56:02 +00:00
Nate Begeman
f76a814673 Fix broken CellSPU lowering, re-instate braces in Legalize 
llvm-svn: 54168
 2008-07-29 19:07:27 +00:00
Nate Begeman
20b060cd54 Disable a fix in the previous patch, since it breaks CellSPU. 
The CellSPU codegen is broken, but needs to be fixed before we can
put this back in.

llvm-svn: 54164
 2008-07-29 18:28:31 +00:00
Nate Begeman
9a71580e21 Add vector shifts to the IR, patch by Eli Friedman. 
CodeGen & Clang work coming next.

llvm-svn: 54161
 2008-07-29 15:49:41 +00:00
Dan Gohman
9653b21dc2 Fold the useful features of alist and alist_node into ilist, and 
a new ilist_node class, and remove them. Unlike alist_node,
ilist_node doesn't attempt to manage storage itself, so it avoids
the associated problems, including being opaque in gdb.

Adjust the Recycler class so that it doesn't depend on alist_node.
Also, change it to use explicit Size and Align parameters, allowing
it to work when the largest-sized node doesn't have the greatest
alignment requirement.

Change MachineInstr's MachineMemOperand list from a pool-backed
alist to a std::list for now.

llvm-svn: 54146
 2008-07-28 21:51:04 +00:00
Dan Gohman
f6391108c6 Fix a typo in a comment. 
llvm-svn: 54136
 2008-07-28 18:43:51 +00:00
Dan Gohman
6bfdeb2ed1 Make the ScheduleDAG's GraphRoot edge be blue and dashed too, like 
the SelectionDAG's.

llvm-svn: 54129
 2008-07-27 22:46:49 +00:00
Dan Gohman
9742f7772d Rename SDOperand to SDValue. 
llvm-svn: 54128
 2008-07-27 21:46:04 +00:00
Dan Gohman
47c5cdbc34 Tidy SDNode::use_iterator, and complete the transition to have it 
parallel its analogue, Value::value_use_iterator. The operator* method
now returns the user, rather than the use.

llvm-svn: 54127
 2008-07-27 20:43:25 +00:00
Dan Gohman
2a0bc8f6e1 Rename isOnlyUseOf to isOnlyUserOf. 
llvm-svn: 54124
 2008-07-27 18:06:42 +00:00
Duncan Sands
545c21768f Some binary operations were being treated as 
unary operations!  Add support for softening
some additional unary operations like fp_to_sint.

llvm-svn: 54122
 2008-07-27 12:28:43 +00:00
Owen Anderson
25a3bf3f0e Fix the issues originally addressed in r54070. After thinking about it some more, I realized that the right thing to do 
is to have StrongPHIElimination use its knowledge of the PHIs before they're erased to update the intervals appropriate.  This is
both simpler and more accurate than the alternative, which was having LIA figure it out when it renumbered things, plus it's just
the right thing to do!

llvm-svn: 54077
 2008-07-25 23:38:08 +00:00
Owen Anderson
8f9ab550a2 Revert my previous patch. In retrospect, this is completely the wrong way to fix this problem. 
llvm-svn: 54072
 2008-07-25 23:06:59 +00:00
Owen Anderson
9408721750 Special cases are needed in renumbering when dealing with renumbering after a PHI has been removed. The interval previously defined 
by the PHI needs to be extended to the beginning of its basic block, and the intervals that were inputs need to be trimmed to the end 
of their basic blocks.

llvm-svn: 54070
 2008-07-25 22:32:01 +00:00
Owen Anderson
9e3ea5a60c In order to avoid reprocessing a register more than once, we need to add it 
to the handled set so it will get filtered out in future iterations.

llvm-svn: 54065
 2008-07-25 21:35:43 +00:00
Owen Anderson
987bd1dc5b Remove live interval entries for an interval if we're eliminating its only VN. 
llvm-svn: 54062
 2008-07-25 21:08:41 +00:00
Owen Anderson
fe97082ddd Properly remap live ranges whose end indices are the end of the function. 
llvm-svn: 54061
 2008-07-25 21:07:13 +00:00
Owen Anderson
cefa4df4c1 Make the remapping of interval indices (particularly ending indices) more robust. 
This is tricky business, and will probably take a few more iterations to get
the last kinks out of it.

llvm-svn: 54043
 2008-07-25 19:50:48 +00:00
Dan Gohman
25c825ede1 Disable the new aggressive remat logic introduced in 54000; it causes some 
regressions, such as PR2595. Also, there is a significant code-quality
issue in SPEC 464.h264ref and a few others.

llvm-svn: 54014
 2008-07-25 15:08:37 +00:00
Mon P Wang
0fba42aefd When splitting a vector shuffle, fixed which type we used for the hi part 
llvm-svn: 54007
 2008-07-25 01:30:26 +00:00
Dan Gohman
68487f0859 Use AliasAnalysis::pointsToConstantMemory in SDISel to avoid unnecessary 
dependencies with constant load nodes. This allows them to be scheduled
freely.

llvm-svn: 54001
 2008-07-25 00:04:14 +00:00
Dan Gohman
680e1bd958 Enable rematerialization of constants using AliasAnalysis::pointsToConstantMemory, 
and knowledge of PseudoSourceValues. This unfortunately isn't sufficient to allow
constants to be rematerialized in PIC mode -- the extra indirection is a
complication.

llvm-svn: 54000
 2008-07-25 00:02:30 +00:00
Owen Anderson
cb7fb7aa4a Store the predecessor MBB in the PHIUnion, rather than an index, since the indices will change after renumbering. 
llvm-svn: 53985
 2008-07-24 17:12:16 +00:00
Owen Anderson
08961cbffe Enable the insertion of empty indices into LiveInterals, thereby making renumbering possible. 
llvm-svn: 53961
 2008-07-23 21:37:49 +00:00
Owen Anderson
58d9213c3a Fix a compile-time regression introduced by my heuristic-changing patch. I forgot 
to multiply the instruction count by a constant factor in a few places, which
caused the register allocator to require many more iterations.

llvm-svn: 53959
 2008-07-23 19:47:27 +00:00
Dan Gohman
6564581be0 Enable first-class aggregates support. 
Remove the GetResultInst instruction. It is still accepted in LLVM assembly
and bitcode, where it is now auto-upgraded to ExtractValueInst. Also, remove
support for return instructions with multiple values. These are auto-upgraded
to use InsertValueInst instructions.

The IRBuilder still accepts multiple-value returns, and auto-upgrades them
to InsertValueInst instructions.

llvm-svn: 53941
 2008-07-23 00:34:11 +00:00
Duncan Sands
550e0de239 LegalizeTypes support for VSETCC. Fixes PR2575. 
llvm-svn: 53938
 2008-07-22 23:54:03 +00:00
Owen Anderson
7b8947cc31 Change the heuristics used in the coalescer, register allocator, and within 
live intervals itself to use an instruction count approximation that is 
not affected by inserting empty indices.

llvm-svn: 53937
 2008-07-22 22:46:49 +00:00
Evan Cheng
1aa928a8e6 Fix pr2566: incorrect assumption about bit_convert. It doesn't not have to output a vector value. Patch by Nicolas Capens! 
llvm-svn: 53932
 2008-07-22 20:42:56 +00:00
Dan Gohman
727b49bc26 Make the GraphRoot edge look like a chain edge, which is more accurate, 
and use the right result number, in the off chance that the graph root
has multiple result values.

llvm-svn: 53923
 2008-07-22 17:52:59 +00:00
Bill Wendling
87b1a0950c Another buildbot test commit. 
llvm-svn: 53896
 2008-07-22 00:53:37 +00:00
Bill Wendling
e0e8ecd5e9 Trivial check-in to test buildbot. No functionality change. 
llvm-svn: 53889
 2008-07-22 00:28:47 +00:00
Dan Gohman
e0ed9af577 Fix grammaros in comments. 
llvm-svn: 53884
 2008-07-21 22:38:59 +00:00
Dan Gohman
b024b0eedd Enhance the GraphWriter support for edge destinations, and teach the 
SelectionDAG graph writer to make use of them. Now, nodes with multiple
values are displayed as such, with incoming edges pointing to the
specific value they use.

llvm-svn: 53875
 2008-07-21 21:06:55 +00:00
Dan Gohman
dd84251894 After early-lowering the FORMAL_ARGUMENTS node, delete it. 
llvm-svn: 53874
 2008-07-21 21:04:07 +00:00
Dan Gohman
b91bef08a7 Add titles to the various SelectionDAG viewGraph calls 
that include useful information like the name of the
block being viewed and the current phase of compilation.

llvm-svn: 53872
 2008-07-21 20:00:07 +00:00
Dan Gohman
8a07776d39 Fix uses of underscore-capital names. 
llvm-svn: 53870
 2008-07-21 19:48:15 +00:00
Dan Gohman
8f718c75f0 Now that the MachineInstr leaks are fixed, enable leak checking 
in the MachineInstr clone code.

llvm-svn: 53868
 2008-07-21 18:47:29 +00:00
Duncan Sands
6e31474e71 Add VerifyNode, a place to put sanity checks on 
generic SDNode's (nodes with their own constructors
should do sanity checking in the constructor).  Add
sanity checks for BUILD_VECTOR and fix all the places
that were producing bogus BUILD_VECTORs, as found by
"make check".  My favorite is the BUILD_VECTOR with
only two operands that was being used to build a
vector with four elements!

llvm-svn: 53850
 2008-07-21 10:20:31 +00:00
Bill Wendling
73f5ecdbea Pull r53795 from Gaz into mainline: 
If .loc and .file aren't used, always emit the "debug_line" section. This
requires at least one entry in the line matrix. So if there's nothing to emit
into the matrix, emit an end of matrix value anyway.

llvm-svn: 53803
 2008-07-20 00:11:19 +00:00
Evan Cheng
5ed6b9f0ae Fix a memory leak in LiveIntervalAnalysis. 
llvm-svn: 53779
 2008-07-19 00:37:25 +00:00
Duncan Sands
ef45c602b6 Softfloat support for FDIV. Patch by 
Richard Pennington.

llvm-svn: 53773
 2008-07-18 21:18:48 +00:00
Duncan Sands
39da9f4a43 Eliminate unused variable. 
llvm-svn: 53772
 2008-07-18 21:07:41 +00:00
Duncan Sands
3d68e2ff9c Revert 53729, after waking up in the middle of 
the night realising that it was wrong :)  I
think the reason the same type was being used
for the shufflevec of indices as for the actual
indices is so that if one of them needs splitting
then so does the other.  After my patch it might
be that the indices need splitting but not the
rest, yet there is no good way of handling that.
I think the right solution is to not have the
shufflevec be an operand at all: just have it
be the list of numbers it actually is, stored
as extra info in the node.

llvm-svn: 53768
 2008-07-18 20:12:05 +00:00
Dan Gohman
e119f3db46 Fix a LocalSpiller leak. This fixes tramp3d-v4. 
llvm-svn: 53766
 2008-07-18 18:28:56 +00:00
Dan Gohman
f38f99ccc5 Re-introduce LeakDetector support for MachineInstrs and MachineBasicBlocks. 
Fix a leak that this turned up in LowerSubregs.cpp.
And, comment a leak in LiveIntervalAnalysis.cpp.

llvm-svn: 53746
 2008-07-17 23:49:46 +00:00
Dan Gohman
c666c01e65 When printing MemOperand nodes, only use print() for 
PseudoSourceValue values, which never have names. Use getName()
for all other values, because we want to print just a short summary
of the value, not the entire instruction.

llvm-svn: 53738
 2008-07-17 21:12:16 +00:00
Evan Cheng
d26080487b Subreg live interval valno may not have a corresponding def machineinstr since it's less precise. 
llvm-svn: 53734
 2008-07-17 19:48:53 +00:00
Duncan Sands
08ea7c0351 Use a legal type for elements of the vector_shuffle 
mask.  These are just indices into the shuffled vector
so their type is unrelated to the type of the
shuffled elements (which is what was being used before).
This fixes vec_shuffle-11.ll when using LegalizeTypes.
What seems to have happened is that Dan's recent change
r53687, which corrected the result type of the shuffle,
somehow caused LegalizeTypes to notice that the mask
operand was a BUILD_VECTOR with a legal type but elements
of an illegal type (i64).  LegalizeTypes legalized this
by introducing a new BUILD_VECTOR of i32 and bitcasting
it to the old type.  But the mask operand is not supposed
to be a bitcast but a straight BUILD_VECTOR of constants,
causing a crash.

llvm-svn: 53729
 2008-07-17 19:28:41 +00:00
Dan Gohman
8981962672 Add a new function, ReplaceAllUsesOfValuesWith, which handles bulk 
replacement of multiple values. This is slightly more efficient
than doing multiple ReplaceAllUsesOfValueWith calls, and theoretically
could be optimized even further. However, an important property of this
new function is that it handles the case where the source value set and
destination value set overlap. This makes it feasible for isel to use
SelectNodeTo in many very common cases, which is advantageous because
SelectNodeTo avoids a temporary node and it doesn't require CSEMap
updates for users of values that don't change position.

Revamp MorphNodeTo, which is what does all the work of SelectNodeTo, to
handle operand lists more efficiently, and to correctly handle a number
of corner cases to which its new wider use exposes it.

This commit also includes a change to the encoding of post-isel opcodes
in SDNodes; now instead of being sandwiched between the target-independent
pre-isel opcodes and the target-dependent pre-isel opcodes, post-isel
opcodes are now represented as negative values. This makes it possible
to test if an opcode is pre-isel or post-isel without having to know
the size of the current target's post-isel instruction set.

These changes speed up llc overall by 3% and reduce memory usage by 10%
on the InstructionCombining.cpp testcase with -fast and -regalloc=local.

llvm-svn: 53728
 2008-07-17 19:10:17 +00:00
Duncan Sands
c3331602f9 LegalizeTypes support for what seems to be the 
only missing ppc long double operations: FNEG
and FP_EXTEND.

llvm-svn: 53723
 2008-07-17 17:35:14 +00:00
Duncan Sands
778e45e748 Turn LegalizeTypes back off again for the moment: 
it is breaking Darwin bootstrap due to missing
functionality.

llvm-svn: 53721
 2008-07-17 17:06:03 +00:00
Duncan Sands
41aeb22c1d Factorize some code for determining which libcall to use. 
llvm-svn: 53713
 2008-07-17 02:36:29 +00:00
Dan Gohman
0025513482 Fix the result type of a VECTOR_SHUFFLE+BIT_CONVERT dagcombine. This 
was turned up by some new SelectionDAG assertion checks that I'm
working on.

llvm-svn: 53687
 2008-07-16 16:13:58 +00:00
Duncan Sands
3448d4087f Add support for promoting and expanding AssertZext 
and AssertSext.  Needed when passing huge integer
parameters with the zeroext or signext attributes.

llvm-svn: 53684
 2008-07-16 16:03:07 +00:00
Dan Gohman
2638ec5b4c Fix a comment to say nonnegative instead of positive. 
llvm-svn: 53681
 2008-07-16 15:57:10 +00:00
Dan Gohman
bc29205ccc Add an assert to check for empty flags for MachineMemOperand. 
llvm-svn: 53680
 2008-07-16 15:56:42 +00:00
Duncan Sands
b753d27377 Reorder methods alphabetically. No functionality change. 
While this is not a wonderful organizing principle, it
does make it easy to find routines, and clear where to
insert new ones.

llvm-svn: 53672
 2008-07-16 11:41:33 +00:00
Duncan Sands
b2e1ddbd0b Turn on LegalizeTypes by default. 
llvm-svn: 53671
 2008-07-16 11:36:51 +00:00
Dan Gohman
c4400b8618 SelectionDAG::AssignNodeIds is unused. 
llvm-svn: 53636
 2008-07-15 18:29:32 +00:00
Dan Gohman
c9b72806d7 Don't sort SDNodes by their addresses in SelectionDAG::dump. Instead, 
just use the AllNodes order, which is at least relatively stable
across runs.

llvm-svn: 53632
 2008-07-15 18:18:54 +00:00
Duncan Sands
7ca2df2319 LegalizeTypes support for fabs on ppc long double. 
llvm-svn: 53613
 2008-07-15 15:02:44 +00:00
Duncan Sands
58eb5e35da LegalizeTypes support for promotion of bswap. 
In LegalizeDAG the value is zero-extended to
the new type before byte swapping.  It doesn't
matter how the extension is done since the new
bits are shifted off anyway after the swap, so
extend by any old rubbish bits.  This results
in the final assembler for the testcase being
one line shorter.

llvm-svn: 53604
 2008-07-15 10:18:22 +00:00
Duncan Sands
710be60c23 LegalizeTypes support for promotion of SIGN_EXTEND_INREG. 
llvm-svn: 53603
 2008-07-15 10:14:24 +00:00
Duncan Sands
d2097e5b92 Reorder the integer promotion methods alphabetically. 
No change in functionality.

llvm-svn: 53602
 2008-07-15 10:12:34 +00:00
Mon P Wang
834c054b1d Fixed potential bug if the source and target of a bit convert have different alignment 
llvm-svn: 53590
 2008-07-15 05:28:34 +00:00
Dan Gohman
e76fd33ee5 Reapply 53476 and 53480, with a fix so that it properly updates 
the BB member to the current basic block after emitting
instructions.

llvm-svn: 53567
 2008-07-14 18:19:29 +00:00
Dan Gohman
7b61b66334 Improve debug output for MemOperandSDNode. PseudoSourceValue nodes 
don't have value names, so use print instead of getName() to get a
useful string.

llvm-svn: 53563
 2008-07-14 17:51:24 +00:00
Dan Gohman
bf764c6a4c Fix edito in the PseudoSourceValue name list. 
llvm-svn: 53562
 2008-07-14 17:45:47 +00:00
Duncan Sands
ef690bbffe I don't think BUILD_PAIR can have a vector result. 
Remove support for this.

llvm-svn: 53559
 2008-07-14 17:34:19 +00:00
Duncan Sands
bb3251e1f4 Tighten up some checks. Fix FPOWI splitting for 
non-power-of-two vectors.

llvm-svn: 53558
 2008-07-14 17:33:37 +00:00
Duncan Sands
134155a263 An INSERT_VECTOR_ELT can insert a larger value 
than the vector element type.  Don't forget to
handle this when the insertion index is not a
constant.

llvm-svn: 53556
 2008-07-14 17:32:02 +00:00
Duncan Sands
5a4bab9849 According to the docs, it is possible to have an 
extending load of a vector.  Handle this case when
splitting vector loads.  I'm not completely sure
what is supposed to happen, but I think it means
hi should be set to undef.  LegalizeDAG does not
consider this case.

llvm-svn: 53555
 2008-07-14 17:27:46 +00:00
Duncan Sands
fd63c72205 There should be no extending loads or truncating 
stores of one-element vectors.  Also, neaten the
handling of INSERT_VECTOR_ELT when the inserted
type is larger than the vector element type.

llvm-svn: 53554
 2008-07-14 17:22:31 +00:00
Duncan Sands
a9d2c2042e Ignore TargetConstant with an illegal type. These 
are used for passing huge immediates in inline ASM
from the front-end straight down to the ASM writer.
Of course this is a hack, but it is simple, limited
in scope, works in practice, and is what LegalizeDAG
does.

llvm-svn: 53553
 2008-07-14 17:15:45 +00:00
Evan Cheng
7457283357 Typos. 
llvm-svn: 53504
 2008-07-12 02:22:07 +00:00
Evan Cheng
05e5317cab Fix PR2536: a nasty spiller bug. If a two-address instruction uses a register but the use portion of its live range is not part of its liveinterval, it must be defined by an implicit_def. In that case, do not spill the use. e.g. 
8   %reg1024<def> = IMPLICIT_DEF
12  %reg1024<def> = INSERT_SUBREG %reg1024<kill>, %reg1025, 2

The live range [12, 14) are not part of the r1024 live interval since it's defined by an implicit def. It will not conflicts with live interval of r1025. Now suppose both registers are spilled, you can easily see a situation where both registers are reloaded before the INSERT_SUBREG and both target registers that would overlap.

llvm-svn: 53503
 2008-07-12 01:56:02 +00:00
Evan Cheng
ebf7ff4531 Back out 53476 and 53480 for now. Somehow they cause llc to miscompile 179.art. 
llvm-svn: 53502
 2008-07-12 01:38:51 +00:00
Dan Gohman
4c18394001 Include a frame index in the "fixed stack" pseudo source value 
instead of using the frame index for the SVOffset, which was
inconsistent.

llvm-svn: 53486
 2008-07-11 22:44:52 +00:00
Dan Gohman
b21183f645 Fix an obsolete top-level comment. 
llvm-svn: 53481
 2008-07-11 22:39:58 +00:00
Dan Gohman
3b91ef27b5 Factor out debugging code into the common base class. 
llvm-svn: 53480
 2008-07-11 22:36:22 +00:00
Dan Gohman
6ee2195ab1 Add support for putting NamedRegionTimers in TimerGroups, and 
use a timer group for the timers in SelectionDAGISel. Also,
Split scheduling out from emitting, to give each their own
timer.

llvm-svn: 53476
 2008-07-11 21:54:34 +00:00
Dan Gohman
d7a32ecde2 Trim unnecessary #includes. 
llvm-svn: 53471
 2008-07-11 20:38:31 +00:00
Duncan Sands
eb04d356e3 Remove an apparently useless routine: there should 
be no need to split the result of a vector RET node,
since they are always already legal.

llvm-svn: 53462
 2008-07-11 17:02:09 +00:00
Duncan Sands
1e3fe05638 It is pointless to turn a UINT_TO_FP into an 
SINT_TO_FP libcall plus additional operations:
it might as well be a direct UINT_TO_FP libcall.
So only turn it into an SINT_TO_FP if the target
has special handling for SINT_TO_FP.

llvm-svn: 53461
 2008-07-11 17:00:14 +00:00
Duncan Sands
58130a26f4 Add two missing SINT_TO_FP libcalls. 
llvm-svn: 53460
 2008-07-11 16:57:02 +00:00
Duncan Sands
52f1dbf139 Port a shift-by-1 optimization from LegalizeDAG: it 
was presumably added after the rest of the code was
copied to LegalizeTypes.

llvm-svn: 53459
 2008-07-11 16:54:57 +00:00
Duncan Sands
669d4d6909 Add support for 128 bit shifts and 32 bit shifts 
on 16 bit machines.

llvm-svn: 53458
 2008-07-11 16:52:29 +00:00
Chris Lattner
78d60a220b Fix a bug in the soft-float handling of FCOPYSIGN that Duncan noticed 
when working on legalizetypes.  Both legalizetypes and legalizeops now
produce hte same code for CodeGen/ARM/fcopysign.ll.

llvm-svn: 53435
 2008-07-10 23:46:13 +00:00
Chris Lattner
5e784a8ebd make legalize types be a command line option: -enable-legalize-types. 
llvm-svn: 53434
 2008-07-10 23:37:50 +00:00
Dan Gohman
1f42b96c7e Make stack slot coloring's debug output more consistent with 
other passes.

llvm-svn: 53415
 2008-07-10 19:49:32 +00:00
Evan Cheng
d7023b66ea Change StackSlotForVirtReg (which maps vregs to frame indices) from std::map to IndexedMap. 
llvm-svn: 53414
 2008-07-10 18:23:23 +00:00
Duncan Sands
a6c09579f0 Add support for 128 bit multiplicative operations. 
Lack of these caused a bootstrap failure with Fortran
on x86-64 with LegalizeTypes turned on.  While there,
be nice to 16 bit machines and support expansion of
i32 too.

llvm-svn: 53408
 2008-07-10 15:35:05 +00:00
Duncan Sands
90a916539d Add a mysteriously missing libcall, FPTOSINT_F80_I32. 
Be nice to 16 bit machines by supporting FP_TO_XINT
expansion for these.

llvm-svn: 53407
 2008-07-10 15:33:02 +00:00
Duncan Sands
91912e046a Fix a FIXME: use an apint in CTTZ legalization. 
llvm-svn: 53406
 2008-07-10 15:30:54 +00:00
Duncan Sands
f2734eabf2 Remove PromoteIntRes_FP_ROUND - not sure what it 
was doing there: FP_ROUND returns a float, not an
integer.

llvm-svn: 53405
 2008-07-10 15:29:55 +00:00
Duncan Sands
16f5ab06b0 Make sure the alignment of the temporary created 
in CreateStackStoreLoad is good enough for both
the source and destination types.

llvm-svn: 53404
 2008-07-10 15:26:17 +00:00
Duncan Sands
a219bb03e1 Make the LegalizeType method naming scheme more regular. 
llvm-svn: 53403
 2008-07-10 15:25:04 +00:00
Duncan Sands
8afe39dc56 Don't barf when dumping a constant that contains 
a ginormous value (eg: i128 -1).

llvm-svn: 53402
 2008-07-10 11:23:14 +00:00
Evan Cheng
3ec3113431 - Change the horrible N^2 isRegReDefinedByTwoAddr. Now callers must supply the operand index of def machineoperand and at most one full scan of non-implicit operands is needed. 
- Change local register allocator to use the new isRegReDefinedByTwoAddr instead of reinventing the wheel.

llvm-svn: 53394
 2008-07-10 07:35:43 +00:00
Owen Anderson
65e43ae1e8 Use DenseMap instead of std::map in local register allocation. This improves the time on instcombine from .31s to .22s 
llvm-svn: 53390
 2008-07-10 01:56:35 +00:00
Owen Anderson
189609bb36 Fix 403.gcc. Finally got the check for two-address-ness correct. 
llvm-svn: 53389
 2008-07-10 01:53:01 +00:00
Owen Anderson
35080ed650 Revert r53367, which was breaking things. 
llvm-svn: 53378
 2008-07-09 23:09:10 +00:00
Dan Gohman
e10fc737ca Simplify hasNUsesOfValue and hasAnyUsesOfValue even more. This 
makes their special-case checks of use_size() less beneficial,
so remove them. This eliminates all but one use of use_size(),
which is in AssignTopologicalOrder, which uses it only once for
each node, and so can reasonably afford to recompute it, as
this allows the UsesSize field of SDNode to be removed
altogether.

llvm-svn: 53377
 2008-07-09 23:03:14 +00:00
Dan Gohman
6ba50d7fc1 hasAnyUseOfValue can check SDUse nodes of its users directly instead 
of examining every operand of every user.

llvm-svn: 53374
 2008-07-09 22:39:01 +00:00
Dan Gohman
679872b05f Move MemoryVT out of LSBaseNode into MemSDNode, allowing the 
getMemOperand function to be moved into the base class as well
and made non-virtual.

llvm-svn: 53372
 2008-07-09 22:08:04 +00:00
Evan Cheng
082f7f802e Avoid creating expensive comment string if it's not going to be printed. 
llvm-svn: 53369
 2008-07-09 21:53:02 +00:00
Owen Anderson
8174cf28a3 Loosen our check here. Local regalloc only cares that the reg is used and def'd by the same instruction, but about the details of 
the relationship.

llvm-svn: 53367
 2008-07-09 21:34:36 +00:00
Dan Gohman
f6e651fcf2 Move the IsVolatile and SVOffset fields into the MemSDNode base 
class, and store IsVolatile and Alignment in a more compact form.
This makes AtomicSDNode slightly larger, but it shrinks LoadSDNode
and StoreSDNode, which are much more common and are the largest of
the SDNode subclasses. Also, this lets the isVolatile() and
getAlignment() accessors be non-virtual.

llvm-svn: 53361
 2008-07-09 21:23:02 +00:00
Owen Anderson
50a64de51e Don't use an expensive check for two-address-ness when we have the information sitting around to determine it much more quickly, 
This speeds up the local register allocator from 0.37s to 0.31s on instcombine.

llvm-svn: 53359
 2008-07-09 21:15:10 +00:00
Owen Anderson
58912683fd Factor local liveness computation out into its own function. 
llvm-svn: 53352
 2008-07-09 20:14:53 +00:00
Dan Gohman
0975e33ffc Reuse the MO variable instead of recomputing it in RegAllocLocal. 
Keep RegAllocSimple in sync.

llvm-svn: 53351
 2008-07-09 20:12:26 +00:00
Dan Gohman
c27e4e9651 Give RegAllocSimple a TargetInstrInfo member to keep it consistent 
with RegAllocLocal.

llvm-svn: 53347
 2008-07-09 19:56:01 +00:00
Dan Gohman
ad2c9877ce RegAllocLocal has a TargetInstrInfo data member. Use it instead 
of having local variables duplicate it.

llvm-svn: 53346
 2008-07-09 19:55:19 +00:00
Dan Gohman
4d221ae533 Use find with std::map, when that's what's needed, instead of lower_bound 
with extra checks.

llvm-svn: 53344
 2008-07-09 19:51:00 +00:00
Anton Korobeynikov
f16db15839 Switch to new section name handling facility 
llvm-svn: 53316
 2008-07-09 13:27:16 +00:00
Duncan Sands
e66e7b80f0 Remove some unneeded includes. 
llvm-svn: 53289
 2008-07-09 12:08:25 +00:00
Duncan Sands
828e080f3b Redo LegalizeTypes soft float support for 
SINT_TO_FP and UINT_TO_FP.  This now produces
the same code as LegalizeDAG (the previous
code was based on a mistaken idea of what
LegalizeDAG did in this case).

llvm-svn: 53288
 2008-07-09 12:07:22 +00:00
Duncan Sands
bc816b10f7 Forgot to update the chain result when softening 
loads.

llvm-svn: 53287
 2008-07-09 11:15:31 +00:00
Duncan Sands
cb4999041b LegalizeTypes soft float support for FP_TO_SINT and 
FP_TO_UINT.

llvm-svn: 53286
 2008-07-09 11:13:46 +00:00
Duncan Sands
c8d39ae369 LegalizeTypes support for powi soft float. 
llvm-svn: 53285
 2008-07-09 11:11:47 +00:00
Duncan Sands
d5c6d06980 Make the role of MVT::i32 clearer here, and add a 
note since it is not clear whether it is correct.

llvm-svn: 53284
 2008-07-09 08:07:41 +00:00
Evan Cheng
098905497f Missed alignment argument on stores lowered from memcpy. 
llvm-svn: 53281
 2008-07-09 06:38:06 +00:00
Bill Wendling
3119083ee6 Make the DICountVisitor not a visitor. This keeps us from calling virtual 
functions and junk.

llvm-svn: 53279
 2008-07-09 06:02:33 +00:00
Dan Gohman
2e23cd5a18 const-ify SelectionDAG::getNodeValueTypes. 
llvm-svn: 53264
 2008-07-09 00:00:42 +00:00
Dan Gohman
9f1547684c It's no longer necessary to test if a MachineBasicBlock's 
parent is non-null. It now always is.

llvm-svn: 53263
 2008-07-08 23:59:09 +00:00
Dan Gohman
286e8f7295 Verify that MachineMemOperand alignment is a non-zero power of 2. 
llvm-svn: 53262
 2008-07-08 23:47:04 +00:00
Dan Gohman
5b24b3baef Factor out the code for computing an alignment value, and make it 
available to getAtomic in addition to just getLoad and getStore,
to prevent MachineMemOperands with 0 alignment.

llvm-svn: 53261
 2008-07-08 23:46:32 +00:00
Owen Anderson
d90ae5127e Fix the build. Apparently MachineInstr& is no longer implicitly convertable to MachineBasicBlock::iterator. 
llvm-svn: 53260
 2008-07-08 23:36:37 +00:00
Owen Anderson
caf8cb40e8 Make the local register allocator compute (purely local) liveness information for itself 
rather than depending on LiveVariables.  This decreases compile time from:
0.5909s (LV + Regalloc) to 0.421s (just regalloc).

llvm-svn: 53256
 2008-07-08 22:24:50 +00:00
Dale Johannesen
31b41acdd4 Remove some dead code. 
llvm-svn: 53253
 2008-07-08 21:53:43 +00:00
Evan Cheng
a5621a1c54 Do not CSE DEBUG_LOC, DBG_LABEL, DBG_STOPPOINT, DECLARE, and EH_LABEL SDNode's. This improves compile time slightly at -O0 -g. 
llvm-svn: 53246
 2008-07-08 20:06:39 +00:00
Duncan Sands
9255845ac7 Remove custom expansion from LegalizeTypes when doing 
soft float: experiments show that targets aren't
expecting this for results or for operands.  Add
support select/select_cc result soft float and
correct operand soft float for these.

llvm-svn: 53245
 2008-07-08 20:03:24 +00:00
Duncan Sands
a41982af51 Add missing select_cc libcall line, somehow omitted 
in LegalizeTypes.

llvm-svn: 53244
 2008-07-08 20:00:05 +00:00
Evan Cheng
6af015292e Unbreak C++ tests on x86 Darwin. 
llvm-svn: 53237
 2008-07-08 16:40:43 +00:00
Duncan Sands
f9f4389fb7 LegalizeTypes support for FP_ROUND and FP_EXTEND 
soft float.

llvm-svn: 53231
 2008-07-08 10:50:55 +00:00
Evan Cheng
5be1103646 Avoid unnecessary string construction during asm printing. 
llvm-svn: 53215
 2008-07-08 00:55:58 +00:00
Dan Gohman
cd25487258 Pool-allocation for MachineInstrs, MachineBasicBlocks, and 
MachineMemOperands. The pools are owned by MachineFunctions.

This drastically reduces the number of calls to malloc/free made
during the "Emit" phase of scheduling, as well as later phases
in CodeGen. Combined with other changes, this speeds up the
"instruction selection" phase of CodeGen by 10% in some cases.

llvm-svn: 53212
 2008-07-07 23:14:23 +00:00
Dan Gohman
93e0208361 Pool-allocation for SDNodes. The pool is allocated once for each function, 
and reused across SelectionDAGs.

This drastically reduces the number of calls to malloc/free made during
instruction selection, and improves memory locality.

llvm-svn: 53211
 2008-07-07 23:02:41 +00:00
Bill Wendling
b30a16ca2c Use the canonical way to get an empty structure. 
llvm-svn: 53206
 2008-07-07 21:41:57 +00:00
Bill Wendling
d7da49634d Use StringMap for greater justice! 
llvm-svn: 53202
 2008-07-07 20:59:31 +00:00
Dan Gohman
d787dcfa3d Fix SDNode::MorphNodeTo (a function used by by SelectNodeTo) to 
properly track dead nodes that are on the original SDNode's operand
list but not the new one, and have no other uses.

llvm-svn: 53201
 2008-07-07 20:57:48 +00:00
Dan Gohman
255eb1d296 Move MachineMemOperand's constructor out of line, to avoid a 
#include dependency on Support/MathExtras.h in the header file.

llvm-svn: 53200
 2008-07-07 20:32:02 +00:00
Dan Gohman
ed34aec9a8 Use of operator* is redundant and confusing here. 
llvm-svn: 53197
 2008-07-07 20:08:05 +00:00
Dan Gohman
7fb6670108 Minor const-correctness fixes. 
llvm-svn: 53196
 2008-07-07 20:06:06 +00:00
Dan Gohman
713d153ea3 Assert that all MachineInstrs update PhysRegUseDefLists in 
their cleanup code. 

llvm-svn: 53194
 2008-07-07 19:55:35 +00:00
Dan Gohman
d263602463 Remove most of the uses of SDOperandPtr, usually replacing it with a 
simple const SDOperand*, which is what's usually needed.

For AddNodeIDOperands, which is small, just duplicate the function to
accept an SDUse*.

For SelectionDAG::getNode - Add an overload that accepts SDUse* that
copies the operands into a temporary SDOperand array, but also has
special-case checks for 0 through 3 operands to avoid the copy in
the common cases.

llvm-svn: 53183
 2008-07-07 18:26:29 +00:00
Dan Gohman
955fdc7a4c Add explicit keywords. 
llvm-svn: 53179
 2008-07-07 18:00:37 +00:00
Dan Gohman
c97817aac3 Make DenseMap's insert return a pair, to more closely resemble std::map. 
llvm-svn: 53177
 2008-07-07 17:46:23 +00:00
Evan Cheng
38ce408540 LegalizeSetCCOperands should legalize the result of ExpandLibCall. Patch by Richard Osborne. 
llvm-svn: 53169
 2008-07-07 07:18:09 +00:00
Bill Wendling
d6bd5ea0b7 Prevent option name conflict. 
llvm-svn: 53166
 2008-07-07 05:42:27 +00:00
Duncan Sands
0caf597378 LegalizeTypes soft-float support for stores of a 
float value.

llvm-svn: 53165
 2008-07-07 00:08:12 +00:00
Mon P Wang
a43d6758ac Fixed generating incorrect aligned stores that I backout of r53031 
that fixed problems in EmitStackConvert where the source and target type
have different alignment by creating a stack slot with the max
alignment of source and target type.

llvm-svn: 53150
 2008-07-05 20:40:31 +00:00
Duncan Sands
3ea6f15708 Rather than having a different custom legalization 
hook for each way in which a result type can be
legalized (promotion, expansion, softening etc),
just use one: ReplaceNodeResults, which returns
a node with exactly the same result types as the
node passed to it, but presumably with a bunch of
custom code behind the scenes.  No change if the
new LegalizeTypes infrastructure is not turned on.

llvm-svn: 53137
 2008-07-04 11:47:58 +00:00
Duncan Sands
aac5c915ed Linux also does not require exception handling 
moves in order to get correct debug info.  Since
I can't imagine how any target could possibly
be any different, I've just stripped out the
option: now all the world's like Darwin!

llvm-svn: 53134
 2008-07-04 09:55:48 +00:00
Bill Wendling
e3ad6f2249 Don't return std::vector by value, but pass it in by reference to be filled. 
llvm-svn: 53123
 2008-07-03 23:13:02 +00:00
Bill Wendling
2c9a84d788 Revert my previous check-in that split up MachineModuleInfo. It turns out to 
slow the compiler down at -O0 some 30% or more. Ooops.

llvm-svn: 53120
 2008-07-03 22:53:42 +00:00
Evan Cheng
01e53a3406 Backed out 53031. 
llvm-svn: 53110
 2008-07-03 18:20:14 +00:00
Evan Cheng
1f6148a84c - Remove calls to copyKillDeadInfo which is an N^2 function. Instead, propagate kill / dead markers as new instructions are constructed in foldMemoryOperand, convertToThressAddress, etc. 
- Also remove LiveVariables::instructionChanged, etc. Replace all calls with cheaper calls which update VarInfo kill list.

llvm-svn: 53097
 2008-07-03 09:09:37 +00:00
Dan Gohman
ca3abd7409 Reapply r52988, "Simplify addRegisterKilled and addRegisterDead." The 
254.gap failure was not due to this mod.

llvm-svn: 53068
 2008-07-03 01:18:51 +00:00
Dan Gohman
3a3ea83ef7 Avoid unnecessarily copying APInt objects. 
llvm-svn: 53065
 2008-07-03 00:52:03 +00:00
Evan Cheng
67ab36cb9d Use std::replace instead of std::find and push_back. 
llvm-svn: 53063
 2008-07-03 00:28:27 +00:00
Evan Cheng
7c3920e692 - Add LiveVariables::replaceKillInstruction. This does a subset of instructionChanged. That is, it only update the VarInfo.kills if the new instruction is known to have the correct dead and kill markers. 
- CommuteInstruction copies kill / dead markers over to new instruction. So use replaceKillInstruction instead.

llvm-svn: 53061
 2008-07-03 00:07:19 +00:00
Owen Anderson
604f9f722d Make LiveVariables even more optional, by making it optional in the call to TargetInstrInfo::convertToThreeAddressInstruction 
Also, if LV isn't around, then TwoAddr doesn't need to be updating flags, since they won't have been set in the first place.

llvm-svn: 53058
 2008-07-02 23:41:07 +00:00
Dan Gohman
741cda0ac8 Replace a few uses of SelectionDAG::getTargetNode with 
SelectionDAG::SelectNodeTo in the instruction selector. This
updates existing nodes in place instead of creating new ones.

Go back to selecting ISD::DBG_LABEL nodes into
TargetInstrInfo::DBG_LABEL nodes instead of leaving them
unselected, now that SelectNodeTo allows us to update them
in place.

llvm-svn: 53057
 2008-07-02 23:23:19 +00:00
Dan Gohman
d9458e2d39 Revert r52988. It broke 254.gap on x86-64. 
llvm-svn: 53050
 2008-07-02 22:12:55 +00:00
Owen Anderson
a420723feb TwoAddressInstructionPass doesn't really require LiveVariables, it just needs to update it if it's already around. 
llvm-svn: 53049
 2008-07-02 21:28:58 +00:00
Duncan Sands
21e2a711e3 Add a new getMergeValues method that does not need 
to be passed the list of value types, and use this
where appropriate.  Inappropriate places are where
the value type list is already known and may be
long, in which case the existing method is more
efficient.

llvm-svn: 53035
 2008-07-02 17:40:58 +00:00
Mon P Wang
55f4371807 Fixed problem in EmitStackConvert where the source and target type 
have different alignment by creating a stack slot with the max
alignment of source and target type.

llvm-svn: 53031
 2008-07-02 17:07:12 +00:00
Chris Lattner
8bcad39c9a instead of aborting on shifts of i1, just implicitly fold them. 
The dag combiner can produce a shift of i1 when folding icmp i1's.

llvm-svn: 53030
 2008-07-02 17:01:57 +00:00
Duncan Sands
b7d8348f0d Fix typo compounded by a cut-and-pasto. 
llvm-svn: 53012
 2008-07-02 10:03:53 +00:00
Duncan Sands
5d5f1e800d Let AnalyzeNewNode take care of calling ExpungeNode. 
This makes sure that all new nodes are expunged, not
just those the top node of a new subtree.

llvm-svn: 53011
 2008-07-02 09:56:41 +00:00
Evan Cheng
3921085102 - Use a faster priority comparison function if -fast. 
- Code clean up.

llvm-svn: 53010
 2008-07-02 09:23:51 +00:00
Chris Lattner
06545d1c4a Add a new (simple) StringMap::clear method, patch by Pratik 
Solanki!

llvm-svn: 53008
 2008-07-02 05:26:32 +00:00
Bill Wendling
83caf5a9d5 Use the canonical form for getting an empty structure. 
llvm-svn: 53003
 2008-07-02 00:50:02 +00:00
Bill Wendling
aa45e38a17 Sorry. I couldn't sleep at night knowing I put these ugly casts into the source tree. 
llvm-svn: 53001
 2008-07-02 00:35:47 +00:00
Bill Wendling
27c38cee90 Darwin doesn't need exception handling information for the "move" info when 
debug information is being output, because it's leet!

llvm-svn: 52994
 2008-07-01 23:34:48 +00:00
Evan Cheng
5389352c98 Avoid creating expensive comment string if it's not going to be printed. 
llvm-svn: 52992
 2008-07-01 23:18:29 +00:00
Owen Anderson
b258a71a37 No need to use std::distance. We can just count the number of operands 
much more cheaply.

llvm-svn: 52990
 2008-07-01 22:34:11 +00:00
Evan Cheng
508e82fcfc Simplify addRegisterKilled and addRegisterDead. 
llvm-svn: 52988
 2008-07-01 22:21:21 +00:00
Bill Wendling
c695823456 - Update comments. 
- Don't use GlobalVariable::LinkageTypes when unsigned works.

llvm-svn: 52987
 2008-07-01 22:08:01 +00:00
Dale Johannesen
d7ea0ac4fd Fix longstanding thinko: don't exclude 
predessors of exit blocks from tail merging
consideration.

llvm-svn: 52985
 2008-07-01 21:50:14 +00:00
Evan Cheng
8a30a09180 Eliminate a compile time warning. 
llvm-svn: 52982
 2008-07-01 21:35:46 +00:00
Owen Anderson
8564cd9dfe Add a version of AsmPrinter::EOL that takes a const char* so that we don't have to do as many implicit std::string constructions. 
Unfortunately, this doesn't appear to translate to a real speedup in practice.

llvm-svn: 52981
 2008-07-01 21:16:27 +00:00
Evan Cheng
9a960dc2b2 Do run ComputeLiveOutVRegInfo with -fast. 
llvm-svn: 52975
 2008-07-01 18:15:04 +00:00
Evan Cheng
67ce381ffe Do not use computationally expensive scheduling heuristics with -fast. 
llvm-svn: 52971
 2008-07-01 18:05:03 +00:00
Evan Cheng
b33d6b69ab Apply Chris' suggestion. 
llvm-svn: 52970
 2008-07-01 17:59:20 +00:00
Dan Gohman
e3b796a81d Minimize duplicated code in AsmPrinter::printLabel. 
llvm-svn: 52944
 2008-07-01 00:16:26 +00:00
Dan Gohman
c8097f8c8c Split ISD::LABEL into ISD::DBG_LABEL and ISD::EH_LABEL, eliminating 
the need for a flavor operand, and add a new SDNode subclass,
LabelSDNode, for use with them to eliminate the need for a label id
operand.

Change instruction selection to let these label nodes through
unmodified instead of creating copies of them. Teach the MachineInstr
emitter how to emit a MachineInstr directly from an ISD label node.

This avoids the need for allocating SDNodes for the label id and
flavor value, as well as SDNodes for each of the post-isel label,
label id, and label flavor.

llvm-svn: 52943
 2008-07-01 00:05:16 +00:00
Evan Cheng
a40bb75480 Suppress compiler warning. 
llvm-svn: 52934
 2008-06-30 22:33:56 +00:00
Evan Cheng
488fdf516f Don't run stack slot coloring if -fast. 
llvm-svn: 52933
 2008-06-30 22:33:16 +00:00
Dan Gohman
082b08f33a Use a simpler but equivalent form of RecordSource. 
llvm-svn: 52931
 2008-06-30 22:21:03 +00:00
Evan Cheng
3ec3837c38 Add timing report for various sub-passes under SelectionDAGISel. 
llvm-svn: 52930
 2008-06-30 22:10:09 +00:00
Dan Gohman
c8c04b1ff4 std::ostream and std::string microoptimizations for asm printing. 
llvm-svn: 52929
 2008-06-30 22:03:41 +00:00
Dan Gohman
9997cc353f Use reserve. 
SelectionDAG::allnodes_size is linear, but that doesn't appear to
outweigh the benefit of reducing heap traffic. If it does become a
problem, we should teach SelectionDAG to keep a count of how many
nodes are live, because there are several other places where that
information would be useful as well.

llvm-svn: 52926
 2008-06-30 21:04:06 +00:00
Dan Gohman
6cc648891b Rename ISD::LOCATION to ISD::DBG_STOPPOINT to better reflect its 
purpose, and give it a custom SDNode subclass so that it doesn't
need to have line number, column number, filename string, and
directory string, all existing as individual SDNodes to be the
operands.

This was the only user of ISD::STRING, StringSDNode, etc., so
remove those and some associated code.

This makes stop-points considerably easier to read in
-view-legalize-dags output, and reduces overhead (creating new
nodes and copying std::strings into them) on code containing
debugging information.

llvm-svn: 52924
 2008-06-30 20:59:49 +00:00
Evan Cheng
3f664b6fd3 Split scheduling from instruction selection. 
llvm-svn: 52923
 2008-06-30 20:45:06 +00:00
Dale Johannesen
30d136e2c6 No need to align the stack if there are no stack 
objects.  Fixes a couple of tests on Linux.

llvm-svn: 52921
 2008-06-30 20:40:16 +00:00
Evan Cheng
a83d69e3b9 Remove unneeded include. 
llvm-svn: 52920
 2008-06-30 20:38:22 +00:00
Dan Gohman
295abfe228 Replace some std::vectors that showed up in heap profiling with 
SmallVectors. Change the signature of TargetLowering::LowerArguments
to avoid returning a vector by value, and update the two targets
which still use this directly, Sparc and IA64, accordingly.

llvm-svn: 52917
 2008-06-30 20:31:15 +00:00
Dan Gohman
62c0b69aec Correct the allocation size for CCState's UsedRegs member, which 
only needs one bit for each register. UsedRegs is a SmallVector
sized at 16, so this eliminates a heap allocation/free for every
call and return processed by Legalize on most targets.

llvm-svn: 52915
 2008-06-30 20:25:31 +00:00
Duncan Sands
93d7b1b4fa ExpungeNode is only needed for new nodes! This 
fixes CodeGen/PowerPC/2008-06-19-LegalizerCrash.ll
when using the new LegalizeTypes infrastructure.

llvm-svn: 52903
 2008-06-30 16:43:45 +00:00
Duncan Sands
c68385d4b5 Support for VAARG. As noted in a comment, this is 
wrong for types like x86 long double and i1, but
no worse than what is done in LegalizeDAG.

llvm-svn: 52898
 2008-06-30 13:55:15 +00:00
Duncan Sands
a706115957 Support for promoting select_cc operands. 
llvm-svn: 52895
 2008-06-30 11:50:11 +00:00
Duncan Sands
c882a4eba9 Revert the SelectionDAG optimization that makes 
it impossible to create a MERGE_VALUES node with
only one result: sometimes it is useful to be able
to create a node with only one result out of one of
the results of a node with more than one result, for
example because the new node will eventually be used
to replace a one-result node using ReplaceAllUsesWith,
cf X86TargetLowering::ExpandFP_TO_SINT.  On the other
hand, most users of MERGE_VALUES don't need this and
for them the optimization was valuable.  So add a new
utility method getMergeValues for creating MERGE_VALUES
nodes which by default performs the optimization.
Change almost everywhere to use getMergeValues (and
tidy some stuff up at the same time).

llvm-svn: 52893
 2008-06-30 10:19:09 +00:00
Evan Cheng
2005804de6 - Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an empty string for ConstantAggregateZero case which surprises selectiondag. 
- Correctly handle memcpy from constant string which is zero-initialized.

llvm-svn: 52891
 2008-06-30 07:31:25 +00:00
Chris Lattner
95fecdd63a Implement split and scalarize for SELECT_CC, fixing PR2504 
llvm-svn: 52887
 2008-06-30 02:43:01 +00:00
Anton Korobeynikov
6f260767ec Revert (52748 and friends): 
Move GetConstantStringInfo to lib/Analysis. Remove
string output routine from Constant. Update all
callers. Change debug intrinsic api slightly to
accomodate move of routine, these now return values
instead of strings.

This unbreaks llvm-gcc bootstrap.

llvm-svn: 52884
 2008-06-29 17:57:03 +00:00
Chris Lattner
2deb9ae6ad Really fix the bootstrap failure. 
llvm-svn: 52854
 2008-06-28 06:24:50 +00:00
Chris Lattner
090d81df5e Add back the capability to include nul characters in strings with 
GetConstantStringInfo.  This will hopefully restore llvm-gcc to 
happy bootstrap land.

llvm-svn: 52851
 2008-06-28 05:33:32 +00:00
Dan Gohman
6b87f869e4 When folding a bitcast into a load or store, preserve the alignment 
information of the original load or store, which is checked to be
at least as good, and possibly better.

llvm-svn: 52849
 2008-06-28 00:45:22 +00:00
Evan Cheng
36adcb1eea Looks like this condition is inverted. 
llvm-svn: 52841
 2008-06-27 22:11:49 +00:00
Bill Wendling
39cc6881e1 Reduce number of times .size() is called on a vector. Rename some variables to 
match normal naming scheme.

llvm-svn: 52820
 2008-06-27 07:13:44 +00:00
Owen Anderson
e0604d46c2 Use a SmallSet when we can to reduce memory allocations. 
This speeds up a particular testcase from 0.0302s to 0.0222s in LiveVariables.

llvm-svn: 52819
 2008-06-27 07:05:59 +00:00
Chris Lattner
635da8cff5 simplify this check, GetConstantStringInfo validates that a 
global is constant already.  No functionality change.

llvm-svn: 52812
 2008-06-27 03:18:41 +00:00
Bill Wendling
e0ea004d40 Cruft left from patch revert...sorry. :-( 
llvm-svn: 52808
 2008-06-27 01:32:08 +00:00
Bill Wendling
e9909a1c2a Reverting broken patch r52803. 
llvm-svn: 52806
 2008-06-27 01:27:56 +00:00
Owen Anderson
242026fa70 Don't perform expensive queries checking for super and sub registers when we know that there aren't any. 
This speed up LiveVariables on instcombine at -O0 -g from 0.3855s to 0.3503s.  Look for more improvements in this area soon!

llvm-svn: 52804
 2008-06-27 01:22:50 +00:00
Bill Wendling
d0c2026584 - Remove a use of std::vector. 
- Make sure that we're not recalculating the size of a vector
  that never changes.

llvm-svn: 52803
 2008-06-27 00:56:36 +00:00
Bill Wendling
2ab62b9a92 Refactor the DebugInfoDesc stuff out of the MachineModuleInfo file. Clean up 
some uses of std::vector, where it's return std::vector by value. Yuck!

llvm-svn: 52800
 2008-06-27 00:09:40 +00:00
Chris Lattner
85cf534e04 duncan points out that isOperationLegal includes a check for 
type legality.  Thanks Duncan!

llvm-svn: 52786
 2008-06-26 17:16:00 +00:00
Owen Anderson
889d683ee8 Don't create a whole new string just to copy the elements into it. 
llvm-svn: 52785
 2008-06-26 17:06:02 +00:00
Dale Johannesen
f170e29cf5 Fixes the last x86-64 test failure in compat.exp: 
<16 x float> is 64-byte aligned (for some reason),
which gets us into the stack realignment code.  The
computation changing FP-relative offsets to SP-relative
was broken, assiging a spill temp to a location
also used for parameter passing.  This
fixes it by rounding up the stack frame to a multiple
of the largest alignment (I concluded it wasn't fixable
without doing this, but I'm not very sure.)

llvm-svn: 52750
 2008-06-26 01:51:13 +00:00
Eric Christopher
4f05c48718 Move GetConstantStringInfo to lib/Analysis. Remove 
string output routine from Constant. Update all
callers. Change debug intrinsic api slightly to
accomodate move of routine, these now return values
instead of strings.

llvm-svn: 52748
 2008-06-26 00:31:12 +00:00
Chris Lattner
2b67ff8632 when we know the signbit of an input to uint_to_fp is zero, 
change it to sint_to_fp on targets where that is cheaper (and
visaversa of course).  This allows us to compile uint_to_fp to:

_test:
	movl	4(%esp), %eax
	shrl	$23, %eax
	cvtsi2ss	%eax, %xmm0
	movl	8(%esp), %eax
	movss	%xmm0, (%eax)
	ret

instead of:

	.align	3
LCPI1_0:					##  double
	.long	0	## double least significant word 4.5036e+15
	.long	1127219200	## double most significant word 4.5036e+15
	.text
	.align	4,0x90
	.globl	_test
_test:
	subl	$12, %esp
	movl	16(%esp), %eax
	shrl	$23, %eax
	movl	%eax, (%esp)
	movl	$1127219200, 4(%esp)
	movsd	(%esp), %xmm0
	subsd	LCPI1_0, %xmm0
	cvtsd2ss	%xmm0, %xmm0
	movl	20(%esp), %eax
	movss	%xmm0, (%eax)
	addl	$12, %esp
	ret

llvm-svn: 52747
 2008-06-26 00:16:49 +00:00
Owen Anderson
68f11ecb86 Remember which MachineOperand we were processing, so we don't have to scan the list to find it again later. 
This speeds up live intervals from 0.37s to 0.30s on instcombine.

llvm-svn: 52745
 2008-06-25 23:39:39 +00:00
Dan Gohman
d1467012f5 Fix the text in an assert string. 
llvm-svn: 52744
 2008-06-25 22:14:43 +00:00
Evan Cheng
71fbfe73c1 - Fix a x86 vector isel bug: illegal transformation of a vector_shuffle into a 
shift.
- Add a readme entry for a missing vector_shuffle optimization that results in
  awful codegen.

llvm-svn: 52740
 2008-06-25 20:52:59 +00:00
Duncan Sands
12c1bee452 Add support for expanding PPC 128 bit floats. 
For this it is convenient to permit floats to
be used with EXTRACT_ELEMENT, so I tweaked
things to allow that.  I also added libcalls
for ppcf128 to i32 forms of FP_TO_XINT, since
they exist in libgcc and this case can certainly
occur (and does occur in the testsuite) - before
the i64 libcall was being used.  Also, the
XINT_TO_FP result seemed to be wrong when
the argument is an i128: the wrong fudge
factor was added (the i32 and i64 cases were
handled directly, but the i128 code fell
through to some generic softening code which
seemed to think it was i64 to f32!).  So I
fixed it by adding a fudge factor that I
found in my breakfast cereal.

llvm-svn: 52739
 2008-06-25 20:24:48 +00:00
Duncan Sands
ab85726912 Add/complete support for integer and float 
select_cc and friends.  This code could be
factorized a bit but I'm not sure that it's
worth it.

llvm-svn: 52724
 2008-06-25 16:34:21 +00:00
Dan Gohman
404964dbc0 Remove the OrigVT member from AtomicSDNode, as it is redundant with 
the base SDNode's VTList.

llvm-svn: 52722
 2008-06-25 16:07:49 +00:00
Mon P Wang
7d89d61387 Added MemOperands to Atomic operations since Atomics touches memory. 
Added abstract class MemSDNode for any Node that have an associated MemOperand
Changed atomic.lcs => atomic.cmp.swap, atomic.las => atomic.load.add, and
atomic.lss => atomic.load.sub

llvm-svn: 52706
 2008-06-25 08:15:39 +00:00
Evan Cheng
bab5925a0b Enable two-address remat by default. 
llvm-svn: 52701
 2008-06-25 01:16:38 +00:00
Owen Anderson
8b2f51618a Use SmallVector instead of std::vector for a minor compile time improvement. 
llvm-svn: 52689
 2008-06-24 21:44:59 +00:00
Dan Gohman
0e992740a0 A brief survey of priority_queue usage in the tree turned this up 
as a questionable case, but the code isn't actually needed.

llvm-svn: 52657
 2008-06-23 23:51:16 +00:00
Bill Wendling
2501066409 This situation can occur: 
,------.
    |      |
    |      v
    |   t2 = phi ... t1 ...
    |      |
    |      v
    |   t1 = ...
    |  ... = ... t1 ...
    |      |
    `------'

where there is a use in a PHI node that's a predecessor to the defining
block. We don't want to mark all predecessors as having the value "alive" in
this case. Also, the assert was too restrictive and didn't handle this case.

llvm-svn: 52655
 2008-06-23 23:41:14 +00:00
Dan Gohman
95743e3078 Use the new PriorityQueue in ScheduleDAGList too, which also 
needs arbitrary-element removal.

llvm-svn: 52654
 2008-06-23 23:40:09 +00:00
Owen Anderson
f2386cff4f Use getMBBEndIdx rather than assuming that the end is right after the last instruction in the block. 
llvm-svn: 52649
 2008-06-23 22:12:23 +00:00
Evan Cheng
73bdede529 Remove option used to debug stack coloring bugs. It's no longer needed since stack coloring is now bug free. 
llvm-svn: 52644
 2008-06-23 21:24:32 +00:00
Dan Gohman
71a0e81d0b Move a DenseMap's declaration outside of a loop, and just call 
clear() on each iteration. This avoids allocating and deallocating
all of DenseMap's memory on each iteration.

llvm-svn: 52642
 2008-06-23 21:15:00 +00:00
Evan Cheng
6e5a126667 Instead of adding an isSS field to LiveInterval to denote stack slot. Use top bit of 'reg' instead. If the top bit is set, than the LiveInterval represents a stack slot live interval. 
llvm-svn: 52639
 2008-06-23 21:03:19 +00:00
Dan Gohman
84cef04f76 Duncan pointed out this code could be tidied. 
llvm-svn: 52624
 2008-06-23 15:29:14 +00:00
Duncan Sands
e7f2c80a8c Port some integer multiplication fixes from LegalizeDAG. 
Bail out with an error if there is no libcall available
for the given size of integer.

llvm-svn: 52622
 2008-06-23 15:15:44 +00:00
Duncan Sands
86e6f1a3b6 Support for expanding the result of EXTRACT_ELEMENT. 
llvm-svn: 52621
 2008-06-23 15:08:15 +00:00
Duncan Sands
1b83cbdebe Cleanup up LegalizeTypes handling of loads and 
stores.

llvm-svn: 52620
 2008-06-23 14:19:45 +00:00
Duncan Sands
d1d3e67d30 Make custom lowering of ADD work correctly. This 
fixes PR2476; patch by Richard Osborne.  The same
problem exists for a bunch of other operators, but
I'm ignoring this because they will be automagically
fixed when the new LegalizeTypes infrastructure lands,
since it already solves this problem centrally.

llvm-svn: 52610
 2008-06-22 09:42:16 +00:00
Dan Gohman
a41cf16a8f Simplify some getNode calls. 
llvm-svn: 52604
 2008-06-21 22:06:07 +00:00
Dan Gohman
4d2c1733d7 canClobberPhysRegDefs shouldn't called without checking hasPhysRegDefs; 
check this with an assert.

llvm-svn: 52603
 2008-06-21 22:05:24 +00:00
Dan Gohman
a313808e69 Use clear() to zero an existing APInt. 
llvm-svn: 52601
 2008-06-21 22:02:15 +00:00
Dan Gohman
7460588026 Use back() instead of [size()-1]. 
llvm-svn: 52600
 2008-06-21 22:00:54 +00:00
Dan Gohman
1e71795b8d Remove a redundant return. 
llvm-svn: 52585
 2008-06-21 19:34:57 +00:00
Dan Gohman
015a5ca374 Remove ScheduleDAG's SUnitMap altogether. Instead, use SDNode's NodeId 
field, which is otherwise unused after instruction selection, as an index
into the SUnit array.

llvm-svn: 52583
 2008-06-21 19:18:17 +00:00
Dan Gohman
4099d0bf27 Add a priority queue class, which is a wrapper around std::priority_queue 
and provides fairly efficient removal of arbitrary elements. Switch
ScheduleDAGRRList from std::set to this new priority queue.

llvm-svn: 52582
 2008-06-21 18:35:25 +00:00
Duncan Sands
1dd6ef8f8e Support for load/store of expanded float types. I 
don't know if a truncating store is possible here,
but added support for it anyway.

llvm-svn: 52577
 2008-06-21 17:00:47 +00:00
Dan Gohman
3a5a96e045 Change ScheduleDAG's SUnitMap from DenseMap<SDNode*, vector<SUnit*> > 
to DenseMap<SDNode*, SUnit*>, and adjust the way cloned SUnit nodes are
handled so that only the original node needs to be in the map.
This speeds up llc on 447.dealII.llvm.bc by about 2%.

llvm-svn: 52576
 2008-06-21 15:52:51 +00:00