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c34fea3935
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27374 Commits

Author SHA1 Message Date
Dan Gohman
c34fea3935 Generalize the ChangeCompareStride code, in preparation for 
handling non-constant strides. No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65363 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-24 01:58:00 +00:00
Dan Gohman
d0a90b9876 Preserve the DominanceFrontier analysis in the LoopDeletion pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65359 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-24 01:21:53 +00:00
Devang Patel
002ec1482c gdb uses DW_AT_prototyped to identify K&R style in C based languages. 
This fixes objc.dg/dwarf-prototypes.m scan-assembler DW_AT_prototyped from llvmgcc42 test suite.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65357 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-24 00:52:19 +00:00
Devang Patel
5622f07a21 While folding unconditional return move DbgRegionEndInst into the predecessor, instead of removing it. This fixes following tests from llvmgcc42 testsuite. 
gcc.c-torture/execute/20000605-3.c
gcc.c-torture/execute/20020619-1.c
gcc.c-torture/execute/20030920-1.c
gcc.c-torture/execute/loop-ivopts-1.c



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65353 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-24 00:05:16 +00:00
Devang Patel
53cac18cca If there is not any debug info available for any global variables and any subprograms then there is not any debug info to emit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65352 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-24 00:02:15 +00:00
Dan Gohman
15cab2817b Back out the change in 64918 that used sign-extensions when promoting 
trip counts that use signed comparisons. It's not obviously the best
approach for preserving trip count information, and at any rate there
isn't anything in the tree right now that makes use of that, so for
now always using zero-extensions is preferable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65347 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 23:20:35 +00:00
Dan Gohman
e9865945ad Fast-isel can't do TLS yet, so it should fall back to SDISel 
if it sees TLS addresses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65341 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 22:03:08 +00:00
Dan Gohman
e2abdd3ff0 LoopDeletion needs to inform ScalarEvolution when a loop is deleted, 
so that ScalarEvolution doesn't hang onto a dangling Loop*, which
could be a problem if another Loop happens to get allocated at the
same address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65323 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 17:10:29 +00:00
Dan Gohman
474cecf0e9 IndVarSimplify preserves ScalarEvolution. In the 
-std-compile-opts sequence, this avoids the need for ScalarEvolution to
be rerun before LoopDeletion.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65318 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 16:29:41 +00:00
Zhou Sheng
8313ef42b7 Should reset DBI_Prev if DBI_Next == 0. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65314 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 10:14:11 +00:00
Evan Cheng
242b38bae5 Only v1i16 (i.e. _m64) is returned via RAX / RDX. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65313 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 09:03:22 +00:00
Nate Begeman
b9a47b824f Generate better code for v8i16 shuffles on SSE2 
Generate better code for v16i8 shuffles on SSE2 (avoids stack)
Generate pshufb for v8i16 and v16i8 shuffles on SSSE3 where it is fewer uops.
Document the shuffle matching logic and add some FIXMEs for later further
  cleanups.
New tests that test the above.

Examples:

New:
_shuf2:
	pextrw	$7, %xmm0, %eax
	punpcklqdq	%xmm1, %xmm0
	pshuflw	$128, %xmm0, %xmm0
	pinsrw	$2, %eax, %xmm0

Old:
_shuf2:
	pextrw	$2, %xmm0, %eax
	pextrw	$7, %xmm0, %ecx
	pinsrw	$2, %ecx, %xmm0
	pinsrw	$3, %eax, %xmm0
	movd	%xmm1, %eax
	pinsrw	$4, %eax, %xmm0
	ret

=========

New:
_shuf4:
	punpcklqdq	%xmm1, %xmm0
	pshufb	LCPI1_0, %xmm0

Old:
_shuf4:
	pextrw	$3, %xmm0, %eax
	movsd	%xmm1, %xmm0
	pextrw	$3, %xmm1, %ecx
	pinsrw	$4, %ecx, %xmm0
	pinsrw	$5, %eax, %xmm0

========

New:
_shuf1:
	pushl	%ebx
	pushl	%edi
	pushl	%esi
	pextrw	$1, %xmm0, %eax
	rolw	$8, %ax
	movd	%xmm0, %ecx
	rolw	$8, %cx
	pextrw	$5, %xmm0, %edx
	pextrw	$4, %xmm0, %esi
	pextrw	$3, %xmm0, %edi
	pextrw	$2, %xmm0, %ebx
	movaps	%xmm0, %xmm1
	pinsrw	$0, %ecx, %xmm1
	pinsrw	$1, %eax, %xmm1
	rolw	$8, %bx
	pinsrw	$2, %ebx, %xmm1
	rolw	$8, %di
	pinsrw	$3, %edi, %xmm1
	rolw	$8, %si
	pinsrw	$4, %esi, %xmm1
	rolw	$8, %dx
	pinsrw	$5, %edx, %xmm1
	pextrw	$7, %xmm0, %eax
	rolw	$8, %ax
	movaps	%xmm1, %xmm0
	pinsrw	$7, %eax, %xmm0
	popl	%esi
	popl	%edi
	popl	%ebx
	ret

Old:
_shuf1:
	subl	$252, %esp
	movaps	%xmm0, (%esp)
	movaps	%xmm0, 16(%esp)
	movaps	%xmm0, 32(%esp)
	movaps	%xmm0, 48(%esp)
	movaps	%xmm0, 64(%esp)
	movaps	%xmm0, 80(%esp)
	movaps	%xmm0, 96(%esp)
	movaps	%xmm0, 224(%esp)
	movaps	%xmm0, 208(%esp)
	movaps	%xmm0, 192(%esp)
	movaps	%xmm0, 176(%esp)
	movaps	%xmm0, 160(%esp)
	movaps	%xmm0, 144(%esp)
	movaps	%xmm0, 128(%esp)
	movaps	%xmm0, 112(%esp)
	movzbl	14(%esp), %eax
	movd	%eax, %xmm1
	movzbl	22(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm1, %xmm2
	movzbl	42(%esp), %eax
	movd	%eax, %xmm1
	movzbl	50(%esp), %eax
	movd	%eax, %xmm3
	punpcklbw	%xmm1, %xmm3
	punpcklbw	%xmm2, %xmm3
	movzbl	77(%esp), %eax
	movd	%eax, %xmm1
	movzbl	84(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm1, %xmm2
	movzbl	104(%esp), %eax
	movd	%eax, %xmm1
	punpcklbw	%xmm1, %xmm0
	punpcklbw	%xmm2, %xmm0
	movaps	%xmm0, %xmm1
	punpcklbw	%xmm3, %xmm1
	movzbl	127(%esp), %eax
	movd	%eax, %xmm0
	movzbl	135(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm0, %xmm2
	movzbl	155(%esp), %eax
	movd	%eax, %xmm0
	movzbl	163(%esp), %eax
	movd	%eax, %xmm3
	punpcklbw	%xmm0, %xmm3
	punpcklbw	%xmm2, %xmm3
	movzbl	188(%esp), %eax
	movd	%eax, %xmm0
	movzbl	197(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm0, %xmm2
	movzbl	217(%esp), %eax
	movd	%eax, %xmm4
	movzbl	225(%esp), %eax
	movd	%eax, %xmm0
	punpcklbw	%xmm4, %xmm0
	punpcklbw	%xmm2, %xmm0
	punpcklbw	%xmm3, %xmm0
	punpcklbw	%xmm1, %xmm0
	addl	$252, %esp
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65311 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 08:49:38 +00:00
Mon P Wang
b0000c376c Changed option name from inline-threshold to basic-inline-threshold because 
inline-threshold option is used by the inliner.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65309 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 07:07:56 +00:00
Chris Lattner
2155088e8c fix some typos that Duncan noticed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65306 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 05:56:17 +00:00
Bill Wendling
ef4cfc749a Propagate debug loc info through prologue/epilogue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65298 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-23 00:42:30 +00:00
Scott Michel
4214a5531c Introduce the BuildVectorSDNode class that encapsulates the ISD::BUILD_VECTOR 
instruction. The class also consolidates the code for detecting constant
splats that's shared across PowerPC and the CellSPU backends (and might be
useful for other backends.) Also introduces SelectionDAG::getBUID_VECTOR() for
generating new BUILD_VECTOR nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65296 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 23:36:09 +00:00
Dan Gohman
bc989d462d Revert the part of 64623 that attempted to align the source in a 
memcpy to match the alignment of the destination. It isn't necessary
for making loads and stores handled like the SSE loadu/storeu
intrinsics, and it was causing a performance regression in
MultiSource/Applications/JM/lencod.

The problem appears to have been a memcpy that copies from some
highly aligned array into an alloca; the alloca was then being
assigned a large alignment, which required codegen to perform
dynamic stack-pointer re-alignment, which forced the enclosing
function to have a frame pointer, which led to increased spilling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65289 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 18:06:32 +00:00
Dan Gohman
a04af4380d Properly parenthesize this expression, fixing a real bug in the new 
-full-lsr code, as well as a GCC warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65288 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 16:40:52 +00:00
Evan Cheng
58207f12ee If a use operand is marked isKill, don't forget to add kill to its live interval as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65279 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 08:35:56 +00:00
Evan Cheng
779aee1fea Add a note. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65275 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 08:13:45 +00:00
Evan Cheng
6140a8b057 Be bug compatible with gcc by returning MMX values in RAX. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65274 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 08:05:12 +00:00
Evan Cheng
c94ebef1b1 Do not consider MMX_MOVD64rr a move instructions. The source register is in GR32, the destination is VR64. They are not compatible. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65273 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 08:04:23 +00:00
Evan Cheng
3cd389de39 Only try to sink immediate when TLI is not null. It needs to check if immediate would fit in target addressing field. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65268 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-22 07:31:19 +00:00
Nick Lewycky
2ec0dbf961 Don't sign extend the char when expanding char -> int during 
load(bitcast(char[4] to i32*)) evaluation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65246 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 20:50:42 +00:00
Richard Pennington
278f83daeb bug 3610: Floating point vaarg not softened. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65239 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 19:11:18 +00:00
Anton Korobeynikov
b5bd026a75 Drop bunch of half-working stuff in the ext_weak linkage support. 
Now we're using one gross, but quite robust hack :) (previous ones
did not work, for example, when ext_weak symbol was used deep inside
constant expression in the initializer).

The proper fix of this problem will require some quite huge asmprinter
changes and that's why was postponed. This fixes PR3629 by the way :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65230 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 11:53:32 +00:00
Evan Cheng
b0ea08066c Add AddrModeMatcher.cpp 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65228 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 07:05:11 +00:00
Evan Cheng
28c7ce3fd4 If two-address def is dead and the instruction does not define other registers, and it doesn't produce side effects, just delete the instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65218 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 03:14:25 +00:00
Evan Cheng
d9fb712403 Teach LSR sink to sink the immediate portion of the common expression back into uses if they fit in address modes of all the uses. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65215 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 02:06:47 +00:00
Bill Wendling
5a45d76c25 Make sure this doesn't access .end() too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65213 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 01:11:36 +00:00
Bill Wendling
8aa374b629 Make sure we don't dereference the .end() of the container. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65211 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 01:07:26 +00:00
Chris Lattner
36d3e326df rename a function to indicate that it checks for profitability as well 
as legality.  Make load sinking and gep sinking more careful: we only
do it when it won't pessimize loads from the stack.  This has the added
benefit of not producing code that is unanalyzable to SROA.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65209 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 00:46:50 +00:00
Bill Wendling
3d2445f5d9 Propagate more debug loc infos. This also includes some code cleaning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65207 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 00:43:56 +00:00
Bill Wendling
2625f9b2e4 We need to propagate the debug location information even when dealing with the 
prologue/epilogue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65206 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-21 00:32:08 +00:00
Dan Gohman
1ba519b726 Fix a bug that David Greene found in the DAGCombiner's logic 
that checks whether it's safe to transform a store of a bitcast
value into a store of the original value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65201 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 23:29:13 +00:00
Evan Cheng
d33cec18a9 Fix strange logic in CollectIVUsers used to determine whether all uses are 
addresses, part 1. This fixes an obvious logic bug. Previously if the only
in-loop use is a PHI, it would return AllUsesAreAddresses as true.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65178 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 22:16:49 +00:00
Dan Gohman
ff518c86f7 Simplify code and reduce indentation. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65167 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 21:27:23 +00:00
Dan Gohman
6b38e29f13 Fix 80-column violations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65159 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 21:06:57 +00:00
Dan Gohman
f0baa6e9cb It's not necessary to check if Base is null here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65157 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 21:05:23 +00:00
Evan Cheng
79fb3b434f Support return of MMX values in 64-bit mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65152 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 20:43:02 +00:00
Bill Wendling
9a65cfe7dd - Early exit a nested block. 
- Correct comment.
- Whitespace changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65149 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 20:40:28 +00:00
Dan Gohman
33e3a36f0a Add a comment about how Imm can be used for loop-variant values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65147 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 20:29:04 +00:00
Torok Edwin
474479fce7 add note about sin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65137 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 18:42:06 +00:00
Evan Cheng
a1fd5b386d Factor address mode matcher out of codegen prepare to make it available to other passes, e.g. loop strength reduction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65134 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 18:24:38 +00:00
Zhou Sheng
3f315eb5e0 Just roll back the previous change to -mem2reg. 
Will re-think about this according to Chris's comments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65126 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 17:49:33 +00:00
Zhou Sheng
a248c45e00 patch to update the line number information in pass -mem2reg. 
Currently this pass will delete the variable declaration info, 
and keep the line number info. But the kept line number info is not updated, 
and some is redundant or not correct, this patch just updates those info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65123 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 16:31:35 +00:00
Owen Anderson
4cafbb58e2 Fix a crash in the pre-alloc splitter exposed by recent codegen changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65121 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 10:02:23 +00:00
Owen Anderson
3b2c01723c Add a quick pass to the stack slot colorer to eliminate some trivially redundant spills after coloring. 
Ideally these would never get created in the first place, but until we enhance the spiller to have a more
global picture of what's happening, this is necessary for code quality in some circumstances.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65120 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 09:11:36 +00:00
Dan Gohman
c17e0cf6c0 Implement "superhero" strength reduction, or full strength 
reduction of address calculations down to basic pointer arithmetic.
This is currently off by default, as it needs a few other features
before it becomes generally useful. And even when enabled, full
strength reduction is only performed when it doesn't increase
register pressure, and when several other conditions are true.

This also factors out a bunch of exisiting LSR code out of
StrengthReduceStridedIVUsers into separate functions, and tidies
up IV insertion. This actually decreases register pressure even
in non-superhero mode. The change in iv-users-in-other-loops.ll
is an example of this; there are two more adds because there are
two fewer leas, and there is less spilling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65108 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 04:17:46 +00:00
Bill Wendling
4ed0c5fb07 Add an accessor method to DwarfWriter to tell of debugging info should be emitted. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65092 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-20 00:44:43 +00:00