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Author SHA1 Message Date
Bob Wilson
12f2b81599 Avoid report_fatal_error in ARM's PrintAsmOperand method. 
The standard error handling in AsmPrinter::EmitInlineAsm handles this much
better, so just use it.

llvm-svn: 122100
 2010-12-17 23:06:42 +00:00
Bob Wilson
21981d44ce Remove trailing whitespace. 
llvm-svn: 122099
 2010-12-17 23:06:32 +00:00
Nate Begeman
ef5f3c0fa7 Add support for matching psign & plendvb to the x86 target 
Remove unnecessary pandn patterns, 'vnot' patfrag looks through bitcasts

llvm-svn: 122098
 2010-12-17 22:55:37 +00:00
Owen Anderson
900ac27338 Thumb's forced-PC-alignment requirement applies to the _total_ displacement, not just to the fragment relative 
portion.  While the fragment boundary is usually already aligned, it is possible for it not to be, which 
would lead to a non-aligned final displacement.

llvm-svn: 122091
 2010-12-17 21:49:48 +00:00
Dale Johannesen
c2c6ebd82a Add a transform to DAG Combiner. This improves the 
code for the case where 32-bit divide by constant is
turned into 64-bit multiply by constant.  8771012.

llvm-svn: 122090
 2010-12-17 21:45:49 +00:00
Michael J. Spencer
f2bf8518fb Support/Path: Deprecate PathV1::isAbsolute. 
llvm-svn: 122086
 2010-12-17 21:21:31 +00:00
Benjamin Kramer
8aca840aff PathV2: Use StringRef::substr to simplify substring creation. 
llvm-svn: 122085
 2010-12-17 20:27:37 +00:00
Jakob Stoklund Olesen
0dc90e6b1b Allow missing kill flags on an untied operand of a two-address instruction when 
the operand uses the same register as a tied operand:

  %r1 = add %r1, %r1

If add were a three-address instruction, kill flags would be required on at
least one of the uses. Since it is a two-address instruction, the tied use
operand must not have a kill flag.

This change makes the kill flag on the untied use operand optional.

llvm-svn: 122082
 2010-12-17 19:18:41 +00:00
Jim Grosbach
7ca8ed3d5d If The ARM WriteNopData() gets an unaligned byte count to pad out, fill in with 
a partial value. rdar://8782954

llvm-svn: 122078
 2010-12-17 19:03:02 +00:00
Benjamin Kramer
a7366b3f19 Missed some StringRefRefs. 
llvm-svn: 122077
 2010-12-17 18:59:09 +00:00
Jim Grosbach
9017f2d179 Add bits 31-28 to the Thumb2 encoding of TBB/TBH. 
llvm-svn: 122076
 2010-12-17 18:42:56 +00:00
Jim Grosbach
e0f65aaf8d Handle 2 and 4 byte data blob fixup values for ARM. 
llvm-svn: 122075
 2010-12-17 18:39:10 +00:00
Benjamin Kramer
89db30db3a Pass StringRefs by value, for consistency. 
llvm-svn: 122074
 2010-12-17 18:19:06 +00:00
Jakob Stoklund Olesen
f4a0c81371 Add MachineLoopRange comparators for sorting loop lists by number and by area. 
llvm-svn: 122073
 2010-12-17 18:13:52 +00:00
Owen Anderson
6acf8c9125 Reapply r121905 (automatic synthesis of @llvm.sadd.with.overflow) with a fix for a bug that manifested itself 
on the DragonEgg self-host bot.  Unfortunately, the testcase is pretty messy and doesn't reduce well due to
interactions with other parts of InstCombine.

llvm-svn: 122072
 2010-12-17 18:08:00 +00:00
Rafael Espindola
3da3498b0a Store and free the TargetObjectWriter. 
llvm-svn: 122070
 2010-12-17 18:01:31 +00:00
Rafael Espindola
b9ca29bc1c Stub out explicit MCELFObjectTargetWriter interface. 
llvm-svn: 122067
 2010-12-17 17:45:22 +00:00
Rafael Espindola
38e6fdfd1d Move createELFObjectWriter to its own header. 
llvm-svn: 122064
 2010-12-17 16:59:53 +00:00
Benjamin Kramer
39b30b18fa SimplifyCFG: Ranges can be larger than 64 bits. Fixes Release-selfhost build. 
llvm-svn: 122054
 2010-12-17 10:48:14 +00:00
Benjamin Kramer
2203fe28df Fix mismatched new[]/delete. 
llvm-svn: 122053
 2010-12-17 09:56:50 +00:00
Kalle Raiskila
68f221707a Don't feed 19 bit immediates to ILA. 
Patch (slightly modified) by Visa Putkinen.

llvm-svn: 122052
 2010-12-17 09:36:09 +00:00
Rafael Espindola
709ffb7084 Use getFixupKindInfo to implement isFixupKindPCRel, ELF version. 
llvm-svn: 122050
 2010-12-17 07:28:17 +00:00
Chris Lattner
e92f8121d4 improve switch formation to handle small range 
comparisons formed by comparisons.  For example,
this:

void foo(unsigned x) {
  if (x == 0 || x == 1 || x == 3 || x == 4 || x == 6) 
    bar();
}

compiles into:

_foo:                                   ## @foo
## BB#0:                                ## %entry
	cmpl	$6, %edi
	ja	LBB0_2
## BB#1:                                ## %entry
	movl	%edi, %eax
	movl	$91, %ecx
	btq	%rax, %rcx
	jb	LBB0_3

instead of:

_foo:                                   ## @foo
## BB#0:                                ## %entry
	cmpl	$2, %edi
	jb	LBB0_4
## BB#1:                                ## %switch.early.test
	cmpl	$6, %edi
	ja	LBB0_3
## BB#2:                                ## %switch.early.test
	movl	%edi, %eax
	movl	$88, %ecx
	btq	%rax, %rcx
	jb	LBB0_4

This catches a bunch of cases in GCC, which look like this:

 %804 = load i32* @which_alternative, align 4, !tbaa !0
 %805 = icmp ult i32 %804, 2
 %806 = icmp eq i32 %804, 3
 %or.cond121 = or i1 %805, %806
 %807 = icmp eq i32 %804, 4
 %or.cond124 = or i1 %or.cond121, %807
 br i1 %or.cond124, label %.thread, label %808

turning this into a range comparison.

llvm-svn: 122045
 2010-12-17 06:20:15 +00:00
Daniel Dunbar
eea7fd1c3e MC/ARM: Use aggressive symbol folding (important for jump tables, for example). 
llvm-svn: 122044
 2010-12-17 06:00:24 +00:00
Daniel Dunbar
1f9fd0b79b MC/Expr: Implemnt more aggressive folding during symbol evaluation using 
IsSymbolRefDifferenceFullyResolved(). For example, we will now fold away
something like:
--
_a:
...
L0:
...
L1:
...
.long (L1 - L0) / 2
--

llvm-svn: 122043
 2010-12-17 05:50:33 +00:00
Daniel Dunbar
6979fc1057 MC/Mach-O: On second thought, use a custom hook for enabling aggressive 
IsSymbolRefDifferenceFullyResolved, it turns out this does change behavior on
enough cases for x86-32 that I would rather wait a bit on it.
 - In practice, we will want to change this eventually because it only means we
   generate less relocations (it also eliminates the need for the horrible
   '.set' hack that Darwin requires in some places).

llvm-svn: 122042
 2010-12-17 05:50:29 +00:00
Daniel Dunbar
14208868a4 MC/Mach-O: Implement IsSymbolRefDifferenceFullyResolved. 
- Unlike for fixups, we always do the "reliable" thing (not just for x86_64).
 - Since Darwin 'as' would typically reject things that using this will allow,
   we don't need to worry about compatibility.

llvm-svn: 122038
 2010-12-17 04:54:58 +00:00
Daniel Dunbar
2caf23b5a9 MC/ObjectWriter: Add a new IsSymbolRefDifferenceFullyResolved target format specific hook. 
- Currently just has stub implementations for Mach-O, ELF, and COFF.

llvm-svn: 122037
 2010-12-17 04:54:54 +00:00
Jakob Stoklund Olesen
40f23cd5ca Provide LiveIntervalUnion::Query::checkLoopInterference. 
This is a three-way interval list intersection between a virtual register, a
live interval union, and a loop. It will be used to identify interference-free
loops for live range splitting.

llvm-svn: 122034
 2010-12-17 04:09:47 +00:00
Daniel Dunbar
f77af712b7 MC/Assembler: Strip out object writer arguments, now that it is always available 
-- and remove FIXME asking for the same!

llvm-svn: 122032
 2010-12-17 02:45:59 +00:00
Daniel Dunbar
54b3f3e5db MC/Assembler: Make the MCObjectWriter available through the lifetime of the 
assembler.

llvm-svn: 122031
 2010-12-17 02:45:41 +00:00
Jim Grosbach
3bb926adff Trailing whitespace and 80 column fixups. 
llvm-svn: 122026
 2010-12-17 02:10:59 +00:00
Daniel Dunbar
6d4a3e98f3 MC/Target: Remove HasScatteredSymbols target hook variable, which has been 
superceded and was effectively dead.

llvm-svn: 122024
 2010-12-17 02:06:08 +00:00
Daniel Dunbar
0d8fdf42c7 MC/Expr: Simplify. 
llvm-svn: 122023
 2010-12-17 02:05:45 +00:00
Bob Wilson
e06f6eabe7 Fix crash compiling a QQQQ REG_SEQUENCE for a Neon vld3_lane operation. 
Radar 8776599

llvm-svn: 122018
 2010-12-17 01:21:12 +00:00
Bob Wilson
125f1a26e0 Use PairDRegs to implement ConcatVectors. No functionality change. 
llvm-svn: 122017
 2010-12-17 01:21:08 +00:00
Bob Wilson
f6fe49f7d2 Fix a comment typo. 
llvm-svn: 122016
 2010-12-17 01:21:05 +00:00
Dan Gohman
f8949c3d1a Revert r64460. strtol and friends cannot be marked readonly, even with 
a null endptr argument, because they may write to errno.

This fixes a seflhost miscompile observed on Linux targets when TBAA
was enabled.

llvm-svn: 122014
 2010-12-17 01:09:43 +00:00
Daniel Dunbar
565c90b316 MC: Remove another dead MCAssembler argument, and update clients. 
llvm-svn: 122013
 2010-12-17 01:07:35 +00:00
Daniel Dunbar
9f83b4d605 MC: Remove dead MCAssembler argument -- Rafael, can you check the FIXME I added 
here?

llvm-svn: 122012
 2010-12-17 01:07:31 +00:00
Daniel Dunbar
17e37880d3 MC: Simplify (remove unnecessary MCAssembler argument, obsoleted by containment 
in MCAsmLayout).

llvm-svn: 122011
 2010-12-17 01:07:28 +00:00
Daniel Dunbar
ed4c226521 Write => in a more normal form. 
llvm-svn: 122009
 2010-12-17 01:07:22 +00:00
Daniel Dunbar
2a0a64029a MC/Expr: Simplify (and add a FIXME). 
llvm-svn: 122008
 2010-12-17 01:07:20 +00:00
Rafael Espindola
bd13ceed72 "Fix" FDE alignment to match what gas does. 
llvm-svn: 122006
 2010-12-17 00:28:02 +00:00
Rafael Espindola
3ee4530406 Make pushq produce signed relocations. 
llvm-svn: 122005
 2010-12-16 22:50:01 +00:00
Wesley Peck
069e991659 Fix MBlaze backend call instructions so that arguments passed through registers 
are correctly marked as used. This removes a hack where the call instructions
marked all possible argument registers as used in the tablegen description.

llvm-svn: 121994
 2010-12-16 19:41:31 +00:00
Jim Grosbach
ce773319e4 Pseudo-ize the Thumb1 tBfar pattern. rdar://8777974 
llvm-svn: 121990
 2010-12-16 19:11:16 +00:00
Daniel Dunbar
471378a4ab MC/Expr: Add a doxyment. 
llvm-svn: 121988
 2010-12-16 18:36:25 +00:00
Daniel Dunbar
2277f06687 MC/Mach-O: Lift some MachObjectWriter arguments into the target specific 
interface.

llvm-svn: 121981
 2010-12-16 17:21:02 +00:00
Daniel Dunbar
5fee4f6862 MC/Mach-O: Stub out explicit MCMachObjectTargetWriter interface. 
llvm-svn: 121973
 2010-12-16 16:09:19 +00:00
Daniel Dunbar
93dc10ffcb Fix indentation (per style guide). 
llvm-svn: 121972
 2010-12-16 16:08:43 +00:00
Daniel Dunbar
636e690f58 MC/Mach-O: Move createMachObjectWriter into MCMachObjectWriter.h. 
llvm-svn: 121971
 2010-12-16 16:08:33 +00:00
Daniel Dunbar
af109884b9 MC/Mach-O: Use fixup info instead of hard coded list. 
llvm-svn: 121970
 2010-12-16 15:42:31 +00:00
Frits van Bommel
56dc4fc838 Fix a bug in the loop in JumpThreading::ProcessThreadableEdges() where it could falsely produce a MultipleDestSentinel value if the first predecessor ended with an 'indirectbr'. If that happened, it caused an unnecessary FindMostPopularDest() call. 
This wasn't a correctness problem, but it broke the fast path for single-predecessor blocks.

llvm-svn: 121966
 2010-12-16 12:16:00 +00:00
Duncan Sands
22de496ae3 Speculatively revert commit 121905 since it looks like it might have broken the 
dragonegg self-host buildbot.  Original commit message:

Add an InstCombine transform to recognize instances of manual overflow-safe addition
(performing the addition in a wider type and explicitly checking for overflow), and
fold them down to intrinsics.  This currently only supports signed-addition, but could
be generalized if someone works out the magic constant formulas for other operations.

llvm-svn: 121965
 2010-12-16 09:40:54 +00:00
Michael J. Spencer
86f6a9ac6e MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm. 
llvm-svn: 121958
 2010-12-16 03:29:14 +00:00
Daniel Dunbar
fc14f1e5f6 MC: Move target specific fixup info descriptors to TargetAsmBackend instead of 
the MCCodeEmitter, which seems like a better organization.
 - Also, cleaned up some magic constants while in the area.

llvm-svn: 121953
 2010-12-16 03:20:06 +00:00
Jason W Kim
2f4a8d7553 1. ARM/MC/ELF: A few more ELF relocs for .o 
2. Fixed EmitLocalCommonSymbol for ELF (Yes, they exist. :)
   Test added.

llvm-svn: 121951
 2010-12-16 03:12:17 +00:00
Daniel Dunbar
8ab9be2005 MC: Make TargetAsmBackend available to the AsmStreamer. 
- Treaty talks on the non-proliferation of MC objects broke down.

llvm-svn: 121949
 2010-12-16 03:05:59 +00:00
Dan Gohman
8540450279 Update a comment. 
llvm-svn: 121946
 2010-12-16 02:55:10 +00:00
Dan Gohman
e106936414 Make memcpyopt TBAA-aware. 
llvm-svn: 121944
 2010-12-16 02:51:19 +00:00
NAKAMURA Takumi
b542a59c37 lib/Support/regexec.c: Let Regex LLP64-aware. 
On LLP64 Win64, 'states1' (for small version) was expanded to 'char *' for large version. Thus small version would be mischosen when nstates > 32 regardless of sizeof(long) on Win64.

llvm-svn: 121942
 2010-12-16 01:48:15 +00:00
Matt Beaumont-Gay
9b5939da47 Delete an extra "Imm5 = ", caught by GCC's -Wsequence-point but not by Clang 
(see PR4579).

llvm-svn: 121939
 2010-12-16 01:34:26 +00:00
Bill Wendling
c22ad4d7ae Remove fixup_arm_thumb_ldst. The code was never calling the "fixup" stuff for 
it. I.e., it was always an immediate value.

llvm-svn: 121932
 2010-12-16 00:50:33 +00:00
Bill Wendling
6ce0807502 Add tSpill and tRestore to the opcodes to replace with tSTRi and tLDRi 
respectively.

It may be a bug that these opcodes are getting this far into machine code
generation.

llvm-svn: 121931
 2010-12-16 00:49:54 +00:00
Bill Wendling
448cd7f1bb Add encodings for Thumb1 Spill and Restore pseudos. 
llvm-svn: 121929
 2010-12-16 00:38:41 +00:00
Dan Gohman
b9583fff47 Enable TBAA by default. 
llvm-svn: 121923
 2010-12-15 23:58:44 +00:00
Dan Gohman
a2fd4f2e22 Preserve TBAA tags when doing load PRE. 
llvm-svn: 121921
 2010-12-15 23:53:55 +00:00
Jim Grosbach
84c2b29b58 Thumb1 had two patterns for the same load-from-constant-pool instruction. 
Canonicalize on tLDRpci and remove tLDRcp.

llvm-svn: 121920
 2010-12-15 23:52:36 +00:00
Eric Christopher
339499f8f3 Don't handle -arm-long-calls in fast isel for now. 
llvm-svn: 121919
 2010-12-15 23:47:29 +00:00
Jakob Stoklund Olesen
1811e4cb20 Start using SplitKit and MachineLoopRanges in RegAllocGreedy in preparation of 
live range splitting around loops guided by register pressure.

So far, trySplit() simply prints a lot of debug output.

llvm-svn: 121918
 2010-12-15 23:46:13 +00:00
Jakob Stoklund Olesen
d40af5ffbd Add MachineLoopRanges analysis. 
A MachineLoopRange contains the intervals of slot indexes covered by the blocks
in a loop. This representation of the loop blocks is more efficient to compare
against interfering registers during register coalescing.

llvm-svn: 121917
 2010-12-15 23:41:23 +00:00
Bill Wendling
63ebdf4786 If we're changing the frame register to a physical register other than SP, we 
need to use tLDRi and tSTRi instead of tLDRspi and tSTRspi respectively.

llvm-svn: 121915
 2010-12-15 23:32:27 +00:00
Bill Wendling
ed6c88ead9 Whitespace cleanups. 
llvm-svn: 121914
 2010-12-15 23:31:24 +00:00
Matt Beaumont-Gay
64b9dd6a4b Better fix for opt build 
llvm-svn: 121910
 2010-12-15 23:14:45 +00:00
Evan Cheng
72dca1ee17 Only rr forms of ADD*_DB are commutable. 
llvm-svn: 121908
 2010-12-15 22:57:36 +00:00
Owen Anderson
aefeb448a9 Add an InstCombine transform to recognize instances of manual overflow-safe addition 
(performing the addition in a wider type and explicitly checking for overflow), and
fold them down to intrinsics.  This currently only supports signed-addition, but could
be generalized if someone works out the magic constant formulas for other operations.

Fixes <rdar://problem/8558713>.

llvm-svn: 121905
 2010-12-15 22:32:38 +00:00
Matt Beaumont-Gay
d59894002d Fix opt -Werror build 
llvm-svn: 121904
 2010-12-15 22:21:20 +00:00
Evan Cheng
68e1ed8752 Teach machine cse to commute instructions. 
llvm-svn: 121903
 2010-12-15 22:16:21 +00:00
Bob Wilson
438a9a1367 Add Neon VCVT instructions for f32 <-> f16 conversions. 
Clang is now providing intrinsics for these and so we need to support them
in the backend.  Radar 8068427.

llvm-svn: 121902
 2010-12-15 22:14:12 +00:00
Dan Gohman
7c7b24af4d Reapply r121886, and also update DecomposeGEPExpression to keep 
it in sync.

llvm-svn: 121895
 2010-12-15 20:49:55 +00:00
Dan Gohman
4f6b802044 Revert r121886. DecomposeGEPExpression needs to be kept 
in sync.

llvm-svn: 121892
 2010-12-15 20:39:25 +00:00
Wesley Peck
2a376c535e Lower the MBlaze target specific calling conventions for "interrupt_handler" 
and "save_volatiles" correctly. This completes the custom calling convention
functionality changes for the MBlaze backend that were started in 121888.

llvm-svn: 121891
 2010-12-15 20:27:28 +00:00
Dan Gohman
8b09daa387 Strengthen GetUnderlyingObject using InstructionSimplify. 
While LLVM's main design is that analysis code shouldn't
go out of its way to understand code which hasn't been
InstCombined, analysis utility routines like this can
find themselves being called in the middle of transform
passes when instcombine hasn't had a chance to run.

llvm-svn: 121886
 2010-12-15 20:10:26 +00:00
Dan Gohman
295ba3ab26 Move Value::getUnderlyingObject to be a standalone 
function so that it can live in Analysis instead of
VMCore.

llvm-svn: 121885
 2010-12-15 20:02:24 +00:00
Wesley Peck
be7405993f Add some special purpose register definitions to the MBlaze backend and cleanup some old, unused floating point register definitions. 
llvm-svn: 121882
 2010-12-15 19:35:36 +00:00
Owen Anderson
1bf81c7f14 Fix typo in r121875. 
llvm-svn: 121880
 2010-12-15 19:24:24 +00:00
Jim Grosbach
30e7f0d09e Tweak a few pseudo-inst pattern base classes. 
llvm-svn: 121878
 2010-12-15 19:03:16 +00:00
Nick Lewycky
44b582fb69 Clean up some of LVI: 
* mergeIn now uses constant folding for constants that are provably not-equal.
 * sink some sanity checks from the get*() methods into the mark*() methods, to ensure that we never have a constant/notconstant ConstantInt
 * some textual cleanups, whitespace changes, removing "else" after return, that sort of thing.

llvm-svn: 121877
 2010-12-15 18:57:18 +00:00
Jim Grosbach
8278d5692a The new t2LEApcrel* pseudo instructions need the size specified. 
rdar://8768390

llvm-svn: 121876
 2010-12-15 18:48:45 +00:00
Owen Anderson
202d654195 Implement cleanups suggested by Daniel. 
llvm-svn: 121875
 2010-12-15 18:48:27 +00:00
Jakob Stoklund Olesen
3cfea82733 Fix build. 
llvm-svn: 121872
 2010-12-15 18:07:48 +00:00
Jakob Stoklund Olesen
308656b955 Detect and enumerate bypass loops. 
Bypass loops have the current live range live through, but contain no uses or
defs. Splitting around a bypass loop can free registers for other uses inside
the loop by spilling the split range.

llvm-svn: 121871
 2010-12-15 17:49:52 +00:00
Jakob Stoklund Olesen
849388944e Separate SplitAnalysis::getSplitLoops(). 
This method returns the set of loops with uses that are candidates for
splitting.

llvm-svn: 121870
 2010-12-15 17:41:19 +00:00
Duncan Sands
2699fb1072 Move Sub simplifications and additional Add simplifications out of 
instcombine and into InstructionSimplify.

llvm-svn: 121861
 2010-12-15 14:07:39 +00:00
Duncan Sands
a9b837f7c7 If we detect that the instruction we are simplifying is unreachable, arrange for 
it to be replaced by undef rather than not replaced at all, the idea being that
this may reduce the amount of work done by whoever called InstructionSimplify.

llvm-svn: 121860
 2010-12-15 11:02:22 +00:00
Frits van Bommel
83b7c3773f Teach jump threading to "look through" a select when the branch direction of a terminator depends on it. 
When it sees a promising select it now tries to figure out whether the condition of the select is known in any of the predecessors and if so it maps the operands appropriately.

llvm-svn: 121859
 2010-12-15 09:51:20 +00:00
Bill Wendling
ab9df10ee5 Add fixups for Thumb LDR/STR instructions. 
llvm-svn: 121858
 2010-12-15 08:51:02 +00:00
Rafael Espindola
94d026d157 Relax alignment fragments. 
With this we don't need the EffectiveSize field anymore. Without that field
LayoutFragment only updates offsets and we don't need to invalidate the
current fragment when it is relaxed (only the ones following it).

This is also a very small improvement in the accuracy of the layout info as
we now use the after relaxation size immediately.

llvm-svn: 121857
 2010-12-15 08:45:53 +00:00
Rafael Espindola
f55f520a7a Patch by David Meyer to avoid a O(N^2) behaviour when relaxing fragments. 
Since we now don't update addresses so early, we might relax a bit more than
we need to. This is simillar to the issue in PR8467.

llvm-svn: 121856
 2010-12-15 07:39:29 +00:00
Chris Lattner
63d08e3444 add another overflow idiom 
llvm-svn: 121854
 2010-12-15 07:28:58 +00:00
Chris Lattner
ec899c30d9 add a note about overflow idiom recognition. 
llvm-svn: 121853
 2010-12-15 07:25:55 +00:00
Rafael Espindola
102a0b7b74 Generalize an assert. 
llvm-svn: 121851
 2010-12-15 07:12:24 +00:00
Chris Lattner
82b8cda077 add a shift/imul missed optimization 
llvm-svn: 121850
 2010-12-15 07:10:43 +00:00
Chris Lattner
d2022fee87 add a note about a SPEC hack that gcc mainline does. 
llvm-svn: 121849
 2010-12-15 06:38:24 +00:00
Chris Lattner
81815cd4db take care of some todos, transforming [us]mul_lohi into 
a wider mul if the wider mul is legal.

llvm-svn: 121848
 2010-12-15 06:04:19 +00:00
Chris Lattner
746d6a1f60 when transforming a MULHS into a wider MUL, there is no need to SRA the 
result, the top bits are truncated off anyway, just use SRL.

llvm-svn: 121846
 2010-12-15 05:51:39 +00:00
Chris Lattner
1499119975 make qsort predicate more conformant by returning 0 for equal values. 
llvm-svn: 121838
 2010-12-15 04:52:41 +00:00
Bill Wendling
258739db7e Reapply r121808 now that the missing patterns have been supplied. 
llvm-svn: 121820
 2010-12-15 01:03:19 +00:00
Bill Wendling
2764f25c78 Add some missing patterns now that tLDRB and tLDRH are split into reg and 
immediate versions.

llvm-svn: 121819
 2010-12-15 00:58:57 +00:00
Owen Anderson
de42e1136e Fix PR8790, another instance where unreachable code can cause instruction simplification to fail, 
this case involve a select that simplifies to itself.

llvm-svn: 121817
 2010-12-15 00:55:35 +00:00
Owen Anderson
df08ec80df Cleanup trailing whitespace. 
llvm-svn: 121816
 2010-12-15 00:52:44 +00:00
Bill Wendling
ad13b53237 Revert r121808 until I can fix the build. 
llvm-svn: 121815
 2010-12-15 00:04:00 +00:00
Jim Grosbach
386d8fc22c thumb adr fixup needs alignment just like the t2 version. 
llvm-svn: 121812
 2010-12-14 23:47:35 +00:00
Bill Wendling
ab3d22ba7f Comments and cleaning. 
llvm-svn: 121809
 2010-12-14 23:42:48 +00:00
Bill Wendling
2883bbb8c0 Make the ISel selections for LDR/STR the same as before the LDRr/LDRi split. In 
particular, we want

   ldr r2, [r3]

to be equivalent to

   ldr r2, [r3, #0]

and not

   ldr r2, [r3, r0]

llvm-svn: 121808
 2010-12-14 23:40:49 +00:00
Jakob Stoklund Olesen
48800c9689 Simplify RegAllocGreedy's use of register aliases. 
llvm-svn: 121807
 2010-12-14 23:38:19 +00:00
Jakob Stoklund Olesen
7ee6f83da1 Simplify CCState's use of register aliases. 
llvm-svn: 121806
 2010-12-14 23:28:01 +00:00
Jakob Stoklund Olesen
03856151db Simplify AggressiveAntiDepBreaker's use of register aliases. 
llvm-svn: 121805
 2010-12-14 23:23:15 +00:00
Jakob Stoklund Olesen
870fbdd686 Simplyfy RegAllocBasic by using getOverlaps instead of getAliasSet. 
llvm-svn: 121801
 2010-12-14 23:10:48 +00:00
Jim Grosbach
1e943cc60d Add support for MC-ized encoding of tLEApcrel and tLEApcrelJT. rdar://8755755 
llvm-svn: 121798
 2010-12-14 22:28:03 +00:00
Bill Wendling
213a3d080d Fix comment. 
llvm-svn: 121797
 2010-12-14 22:26:49 +00:00
Bill Wendling
7e589d4753 Multiclassify the LDR/STR encoding patterns. The only functionality difference 
is the addition of the FoldableAsLoad & Rematerializable flags to some of the
load instructions. ARM has these flags set for them.

llvm-svn: 121794
 2010-12-14 22:10:49 +00:00
Evan Cheng
7e96e67d98 Fix a minor bug in two-address pass. It was missing a commute opportunity. 
regB = move RCX
regA = op regB, regC
RAX  = move regA
where both regB and regC are killed. If regB is constrainted to non-compatible
physical registers but regC is not constrainted at all, then it's better to
commute the instruction.
       movl    %edi, %eax
       shlq    $32, %rcx
       leaq    (%rcx,%rax), %rax
=>
       movl    %edi, %eax
       shlq    $32, %rcx
       orq     %rcx, %rax
rdar://8762995

llvm-svn: 121793
 2010-12-14 21:34:53 +00:00
Jim Grosbach
70721628b4 trailing whitespace 
llvm-svn: 121792
 2010-12-14 21:28:29 +00:00
Matt Beaumont-Gay
01264443a8 Move debugging code entirely within DEBUG(). Silences an unused variable 
warning in the opt build.

llvm-svn: 121791
 2010-12-14 21:14:55 +00:00
Jim Grosbach
e84e95e6d2 Refactor a bit for legibility. 
llvm-svn: 121790
 2010-12-14 21:10:47 +00:00
Jim Grosbach
ef58d5968e trailing whitespace. 
llvm-svn: 121789
 2010-12-14 20:46:39 +00:00
Jim Grosbach
13d82ea2b1 Make sure to propagate the predicate operands for LEApcrel to ADR. 
llvm-svn: 121788
 2010-12-14 20:45:47 +00:00
Owen Anderson
4ce4ce2f60 Fix a small bug (typo?) in the fixup for Thumb1 CBZ/CBNZ instructions. 
llvm-svn: 121784
 2010-12-14 19:42:53 +00:00
Jakob Stoklund Olesen
c13ce4748e Add LiveIntervalUnion print methods, RegAllocGreedy::trySplit debug spew. 
llvm-svn: 121783
 2010-12-14 19:38:49 +00:00
Jakob Stoklund Olesen
c5ad05ca30 Use TRI::printReg instead of AbstractRegisterDescription when printing 
LiveIntervalUnions.

llvm-svn: 121781
 2010-12-14 18:53:47 +00:00
Jakob Stoklund Olesen
d0b2397aaa Add TargetRegisterInfo::printReg() to pretty-print registers. 
llvm-svn: 121780
 2010-12-14 18:53:39 +00:00
Jim Grosbach
25d3e79b23 ARM Fixups relative to thumb functions need to have the low bit of the value 
set for interworking to work properly. rdar://8755956

llvm-svn: 121778
 2010-12-14 18:46:57 +00:00
Jakob Stoklund Olesen
74ba8b77e6 Q.seenAllInterferences() must be called after Q.collectInterferingVRegs(). 
llvm-svn: 121774
 2010-12-14 17:47:36 +00:00
Daniel Dunbar
3f9b9dc852 MC/ARM: Fix-up fixup offset for fixup_arm_branch target specific fixup. 
llvm-svn: 121772
 2010-12-14 17:37:16 +00:00
Jim Grosbach
88727a93a8 Trailing whitespace 
llvm-svn: 121769
 2010-12-14 16:25:15 +00:00
Bill Wendling
4fe39bae17 Use the integer scheduling intrinsic for integer loads and stores. 
llvm-svn: 121765
 2010-12-14 12:33:05 +00:00
Chris Lattner
c1aaf52608 - Insert new instructions before DomBlock's terminator, 
which is simpler than finding a place to insert in BB.
 - Don't perform the 'if condition hoisting' xform on certain
   i1 PHIs, as it interferes with switch formation.

This re-fixes "example 7", without breaking the world hopefully.

llvm-svn: 121764
 2010-12-14 08:46:09 +00:00
Chris Lattner
22d4dc5a4d fix two significant issues with FoldTwoEntryPHINode: 
first, it can kick in on blocks whose conditions have been
folded to a constant, even though one of the edges will be
trivially folded.

second, it doesn't clean up the "if diamond" that it just 
eliminated away.  This is a problem because other simplifycfg
xforms kick in depending on the order of block visitation,
causing pointless work.

llvm-svn: 121762
 2010-12-14 08:01:53 +00:00
Chris Lattner
362f9a82c0 remove the instsimplify logic I added in r121754. It is apparently 
breaking the selfhost builds, though I can't fathom how.

llvm-svn: 121761
 2010-12-14 07:53:03 +00:00
Chris Lattner
c2e42269ae clean up logic, convert std::set to SmallPtrSet, handle the case 
when all 2-entry phis are simplified away.

llvm-svn: 121760
 2010-12-14 07:41:39 +00:00
Chris Lattner
8e4194276b tidy up a bit, move DEBUG down to when we commit to doing the transform so we 
don't print it unless the xform happens.

llvm-svn: 121758
 2010-12-14 07:23:10 +00:00
Chris Lattner
811462b2f4 use SimplifyInstruction instead of reimplementing part of it. 
llvm-svn: 121757
 2010-12-14 07:20:29 +00:00
Chris Lattner
e2400eb801 simplify GetIfCondition by using getSinglePredecessor. 
llvm-svn: 121756
 2010-12-14 07:15:21 +00:00
Chris Lattner
8ea88e66dd use AddPredecessorToBlock in 3 places instead of a manual loop. 
llvm-svn: 121755
 2010-12-14 07:09:42 +00:00
Chris Lattner
a87ac36a54 make FoldTwoEntryPHINode use instsimplify a bit, make 
GetIfCondition faster by avoiding pred_iterator.  No
really interesting change.

llvm-svn: 121754
 2010-12-14 07:00:00 +00:00
Chris Lattner
027d572664 remove the dead (and terrible) llvm::RemoveSuccessor function. 
llvm-svn: 121753
 2010-12-14 06:51:55 +00:00
Chris Lattner
d9436ab7d7 improve DEBUG's a bit, switch to eraseFromParent() to simplify 
code a bit, switch from constant folding to instsimplify.

llvm-svn: 121751
 2010-12-14 06:17:25 +00:00
Chris Lattner
093b5b256d reapply my recent change that disables a piece of the switch formation 
work, but fixes 400.perlbmk.

llvm-svn: 121749
 2010-12-14 05:57:30 +00:00