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9679 Commits

Author SHA1 Message Date
Dan Gohman
365b0e0f0f Update LabelsBeforeInsn also, when creating unknown-position labels. 
llvm-svn: 103145
 2010-05-06 00:29:41 +00:00
Chris Lattner
014a954e3d Fix PR7054 - Assertion `Symbol->isUndefined() && "Cannot define a symbol twice!"' failed. 
Users can write broken code that emits the same label twice with asm renaming,
detect this and emit a fatal backend error instead of aborting.

llvm-svn: 103140
 2010-05-06 00:05:37 +00:00
Dan Gohman
f7bc83b2ed In bottom-up mode, defer the materialization of local constant values. 
llvm-svn: 103139
 2010-05-06 00:02:14 +00:00
Dan Gohman
180422793f Add an "IsBottomUp" member function to FastISel, which will be used to 
support a new bottom-up mode.

llvm-svn: 103138
 2010-05-05 23:58:35 +00:00
Dan Gohman
2f1182c0ac Emit debug info for MachineInstrs with unknown debug locations, instead 
of just letting them inherit the debug locations of adjacent instructions.

Debug info should aim to be either accurate or absent.

llvm-svn: 103135
 2010-05-05 23:41:32 +00:00
Jakob Stoklund Olesen
2e5d12acfa Fix PR6520. An earlyclobber physreg must not be allocated to anything else. 
llvm-svn: 103133
 2010-05-05 23:07:41 +00:00
Devang Patel
041a8fa086 Use getValue() for PHINodes when direct NodeMap access does not work. 
llvm-svn: 103126
 2010-05-05 22:29:00 +00:00
Evan Cheng
d7bc27a079 Move REG_SEQUENCE removal to 2addr pass. 
llvm-svn: 103109
 2010-05-05 18:45:40 +00:00
Evan Cheng
25c07ac593 Teach liveintervalanalysis about virtual registers which are defined by reg_sequence instructions that are formed by registers defined by distinct instructions. e.g. 
80      %reg1041:6<def> = VSHRNv4i16 %reg1034<kill>, 12, pred:14, pred:%reg0
. . .
120     %reg1041:5<def> = VSHRNv4i16 %reg1039<kill>, 12, pred:14, pred:%reg0

llvm-svn: 103102
 2010-05-05 18:27:40 +00:00
Bob Wilson
e81252b747 Combine the implementations of the core part of the SSAUpdater and 
MachineSSAUpdater to avoid duplicating all the code.

llvm-svn: 103060
 2010-05-04 23:18:19 +00:00
Evan Cheng
9cd91d458a Teach PHI elimination to remove REG_SEQUENCE instructions and update references of the source operands with references of the destination with subreg indices. e.g. 
%reg1029<def>, %reg1030<def> = VLD1q16 %reg1024<kill>, ...
%reg1031<def> = REG_SEQUENCE %reg1029<kill>, 5, %reg1030<kill>, 6
=>
%reg1031:5<def>, %reg1031:6<def> = VLD1q16 %reg1024<kill>, ...

PHI elimination now does more than phi elimination. It is really a de-SSA pass.

llvm-svn: 103039
 2010-05-04 20:26:52 +00:00
Evan Cheng
9bdd9f4746 Rename variables for consistency. 
llvm-svn: 103013
 2010-05-04 17:12:26 +00:00
Devang Patel
ee7c7143dc Set DW_AT_APPLE_omit_frame_ptr in endFunction() where MachineFunction is available all the time. 
llvm-svn: 103001
 2010-05-04 06:15:30 +00:00
Evan Cheng
66ef3ff9c7 Instruction selection optimizations may have moved the def of a function argument out of the entry block. rdar://7937489 
llvm-svn: 102993
 2010-05-04 00:58:39 +00:00
Evan Cheng
f7b5c86a0b Teach scheduler about REG_SEQUENCE. 
llvm-svn: 102984
 2010-05-04 00:22:40 +00:00
Dan Gohman
50b08bfbc8 Re-enable isel kill flags, now that the local allocator is ignoring them. 
llvm-svn: 102981
 2010-05-04 00:12:15 +00:00
Jakob Stoklund Olesen
4ef97cf59c Remove preexisting kill flags in RegAllocLocal, just like LiveVariables does. 
This should make it possible to start producing kill flags in isel without
breaking stuff.

llvm-svn: 102976
 2010-05-03 23:49:20 +00:00
Dan Gohman
8bfd5f99b5 Factor out FastISel's code for materializing constants and other values 
in registers into a separate function to de-couple it from the
top-down-specific logic in getRegForValue.

llvm-svn: 102975
 2010-05-03 23:36:34 +00:00
Jakob Stoklund Olesen
51ab2653d5 Check that subregisters don't have independent values in RemoveCopyByCommutingDef(). 
This fixes PR6941.

llvm-svn: 102970
 2010-05-03 22:40:32 +00:00
Eric Christopher
cbbb35694f Reword a comment slightly. 
llvm-svn: 102966
 2010-05-03 22:18:49 +00:00
Bob Wilson
9c9622768e Print basic block numbers in live interval debug output. Since the rest of the 
debug output is showing machine instructions, the IR-level basic block names
aren't very meaningful, and because multiple machine basic blocks may be
derived from one IR-level BB, they're also not unique.

llvm-svn: 102960
 2010-05-03 21:38:11 +00:00
Dan Gohman
15cb983f55 Fix a bug which prevented tail merging of return instructions in 
beneficial cases. See the changes in test/CodeGen/X86/tail-opts.ll and
test/CodeGen/ARM/ifcvt2.ll for details.

The fix is to change HashEndOfMBB to hash at most one instruction,
instead of trying to apply heuristics about when it will be profitable to
consider more than one instruction. The regular tail-merging heuristics
are already prepared to handle the same cases, and they're more precise.

Also, make test/CodeGen/ARM/ifcvt5.ll and
test/CodeGen/Thumb2/thumb2-branch.ll slightly more complex so that they
continue to test what they're intended to test.

And, this eliminates the problem in
test/CodeGen/Thumb2/2009-10-15-ITBlockBranch.ll, the testcase from
PR5204. Update it accordingly.

llvm-svn: 102907
 2010-05-03 14:35:47 +00:00
Dale Johannesen
a8f83a5f1b Don't count debug info as instructions. This was 
preventing the emission of the NOP on Darwin for a
function with no actual code.  From timberwolfmc
with TEST=optllcdbg.

llvm-svn: 102843
 2010-05-01 16:41:11 +00:00
Anton Korobeynikov
a3726088fa Insert ANY_EXTEND node instead of invalid truncate during DAG Combining (X & 1), 
when needed. This fixes PR7001

llvm-svn: 102838
 2010-05-01 12:52:34 +00:00
Dan Gohman
ada97c52fe Remove the code for special-casing byval for fast-isel. SelectionDAG 
handles argument lowering anyway, so there's no need for special
casing here.

llvm-svn: 102828
 2010-05-01 02:44:23 +00:00
Dan Gohman
fb5d6a5d70 Re-disable kill flags, as there is more trouble. 
llvm-svn: 102826
 2010-05-01 01:57:56 +00:00
Dan Gohman
5fc96b81ec Re-enable kill flags from SelectionDAGISel, with a fix: don't 
try to put a kill flag on a DBG_INFO instruction.

llvm-svn: 102820
 2010-05-01 00:50:53 +00:00
Dale Johannesen
c0bf114984 Fix a bug where debug info affected stack slot coloring. 
Seen in SingleSrc/Benchmarks/Misc/flops with TEST=optllcdbg.
7929951.

llvm-svn: 102819
 2010-05-01 00:41:15 +00:00
Dan Gohman
1a6c7dfb3e Fix whitespace. 
llvm-svn: 102817
 2010-05-01 00:33:28 +00:00
Dan Gohman
37fe41a8c0 Don't pass SDValues by non-const reference unless they may be 
modified.

llvm-svn: 102816
 2010-05-01 00:33:16 +00:00
Dan Gohman
0561bd78d0 Reorgnaize more switch code lowering to clean up some tricky 
code, and to eliminate the need for the SelectionDAGBuilder
state to be live during CodeGenAndEmitDAG calls.

Call SDB->clear() before CodeGenAndEmitDAG calls instead of
before it, and move the CurDAG->clear() out of SelectionDAGBuilder,
which doesn't own the DAG, and into CodeGenAndEmitDAG.

llvm-svn: 102814
 2010-05-01 00:25:44 +00:00
Dan Gohman
d59de31ce2 Delete the EdgeMapping variable itself. 
llvm-svn: 102810
 2010-05-01 00:02:20 +00:00
Dan Gohman
68f04d06c8 Get rid of the EdgeMapping map. Instead, just check for BasicBlock 
changes before doing phi lowering for switches.

llvm-svn: 102809
 2010-05-01 00:01:06 +00:00
Bill Wendling
95a4929ac7 EXTRACT_VECTOR_ELT of an INSERT_VECTOR_ELT may have the same index, but the 
indexes could be of a different value type. Or not even using the same SDNode
for the constant (weird, I know). Compare the actual values instead of the
pointers.

llvm-svn: 102791
 2010-04-30 22:19:17 +00:00
Dan Gohman
e980525516 Remove this debug output. The MachineFunction will be printed once all of 
instruction selection is done; it's confusing to see parts of it printed,
while other parts are omitted, along the way.

llvm-svn: 102771
 2010-04-30 21:21:21 +00:00
Jakob Stoklund Olesen
fac584ed9e The local register allocator has to spill dirty callee saved registers before a 
call that might throw. The landing pad assumes that all registers are in stack
slots.

We used to spill those dirty CSRs after the call, and the stack slots would be
wrong when arriving at the landing pad.

llvm-svn: 102770
 2010-04-30 21:19:29 +00:00
Devang Patel
52c2d4d378 Attach AT_APPLE_optimized attribute to optimized function's debug info. 
llvm-svn: 102743
 2010-04-30 19:38:23 +00:00
Dan Gohman
066b8d3640 EmitDbgValue doesn't need its EdgeMapping argument. 
llvm-svn: 102742
 2010-04-30 19:35:33 +00:00
Jakob Stoklund Olesen
1fb8dbce5a Don't use floating point in SimpleRegisterCoalescing. 
Rounding differences causes tests to fail on Linux.

llvm-svn: 102729
 2010-04-30 18:28:11 +00:00
Dan Gohman
e9ff394082 Apply a patch from Jan Sjodin to fix a compiler abort on vector 
comparisons sign-extended to a different bitwidth than the
comparison operands.

llvm-svn: 102721
 2010-04-30 17:19:19 +00:00
Dan Gohman
140e0899ad Temporarily disable SelectionDAG kill flags, which are causing trouble. 
llvm-svn: 102680
 2010-04-30 00:32:51 +00:00
Dan Gohman
1534ad2d28 Set register kill flags on the SelectionDAG path, at least in the 
easy cases.

llvm-svn: 102678
 2010-04-30 00:08:21 +00:00
Jakob Stoklund Olesen
01254ea96d Reject really weird coalescer case when trying to merge identical subregisters 
of different register classes. e.g.

  %reg1048:3<def> = EXTRACT_SUBREG %RAX<kill>, 3

Where %reg1048 is a GR32 register. This is not impossible to handle, but it is
pretty hard and very rare.

This should unbreak the dragonegg builder.

llvm-svn: 102672
 2010-04-29 23:47:46 +00:00
Dan Gohman
b8cdd4037b Fix typos in assertion strings. 
llvm-svn: 102666
 2010-04-29 23:25:34 +00:00
Jakob Stoklund Olesen
1fea22bc70 Slightly verboser debug spew from coalescer 
llvm-svn: 102663
 2010-04-29 22:21:48 +00:00
Devang Patel
bdfc01f418 Refactor. 
llvm-svn: 102661
 2010-04-29 20:40:36 +00:00
Dale Johannesen
a4fd142987 Make naked functions work on PPC. 
llvm-svn: 102657
 2010-04-29 19:32:19 +00:00
Devang Patel
c34efcfee7 Print variable scope name in DEBUG_VALUE comment. Useful in some cases. e.g. 
##DEBUG_VALUE: runOnMachineFunction:this <- RDI+0
	##DEBUG_VALUE: runOnMachineFunction:fn <- RSI+0
	##DEBUG_VALUE: DeadDefs <- undef ## SimpleRegisterCoalescing.cpp:2706
	##DEBUG_VALUE: getRegInfo:this <- [%rsp+$56]+$0
	##DEBUG_VALUE: getTarget:this <- [%rsp+$56]+$0

llvm-svn: 102655
 2010-04-29 18:52:10 +00:00
Evan Cheng
8ea213f823 Remove DBG_VALUE which reference dead stack slots. 
llvm-svn: 102654
 2010-04-29 18:51:00 +00:00
Devang Patel
1e28f36308 DO not push DBG_VALUE machine instructions for inlined fuction arguments in entry block. 
llvm-svn: 102653
 2010-04-29 18:50:36 +00:00