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6537 Commits

Author SHA1 Message Date
Duncan Sands
51ce06c788 Fix PR3694: add an instcombine micro-optimization that helps 
clean up when using variable length arrays in llvm-gcc.

llvm-svn: 65832
 2009-03-02 09:18:21 +00:00
Nate Begeman
6b41d33726 Fix a problem with DAGCombine on 64b targets where folding 
extracts + build_vector into a shuffle would fail, because the
type of the new build_vector would not be legal.  Try harder to
create a legal build_vector type.  Note: this will be totally 
irrelevant once vector_shuffle no longer takes a build_vector for
shuffle mask.

New:
_foo:
	xorps	%xmm0, %xmm0
	xorps	%xmm1, %xmm1
	subps	%xmm1, %xmm1
	mulps	%xmm0, %xmm1
	addps	%xmm0, %xmm1
	movaps	%xmm1, 0

Old:
_foo:
	xorps	%xmm0, %xmm0
	movss	%xmm0, %xmm1
	xorps	%xmm2, %xmm2
	unpcklps	%xmm1, %xmm2
	pshufd	$80, %xmm1, %xmm1
	unpcklps	%xmm1, %xmm2
	pslldq	$16, %xmm2
	pshufd	$57, %xmm2, %xmm1
	subps	%xmm0, %xmm1
	mulps	%xmm0, %xmm1
	addps	%xmm0, %xmm1
	movaps	%xmm1, 0

llvm-svn: 65791
 2009-03-01 23:44:07 +00:00
Duncan Sands
b55953cfc0 Functions marked malloc are noalias return. 
llvm-svn: 65775
 2009-03-01 16:19:31 +00:00
Duncan Sands
2a1baecb38 Adjust this test for recent llvm-gcc changes. 
llvm-svn: 65771
 2009-03-01 15:01:51 +00:00
Evan Cheng
276f9b02c5 Minor optimization: 
Look for situations like this:                                                                                                                                                              
%reg1024<def> = MOV r1                                                                                                                                                                      
%reg1025<def> = MOV r0                                                                                                                                                                      
%reg1026<def> = ADD %reg1024, %reg1025                                                                                                                                                      
r0            = MOV %reg1026                                                                                                                                                                
Commute the ADD to hopefully eliminate an otherwise unavoidable copy.

llvm-svn: 65752
 2009-03-01 02:03:43 +00:00
Chris Lattner
50be1d46f2 tweak this to accept asmprinter changes. I have no way to verify this, hopefully 
the buildbot will work.

llvm-svn: 65750
 2009-03-01 01:28:40 +00:00
Chris Lattner
a9611661b0 Fix a pretty awesome bug that only happened in a strange case with anonymous 
types.  This was reading the uint for the keyword after the token was advanced.

llvm-svn: 65743
 2009-03-01 00:53:13 +00:00
Chris Lattner
76fd170cbc adjust for asmprinter change. 
llvm-svn: 65741
 2009-03-01 00:26:51 +00:00
Chris Lattner
f8c9dfe644 adjust for asmprinter change. 
llvm-svn: 65740
 2009-03-01 00:25:46 +00:00
Chris Lattner
3680a9598e adjust test to make it more robust 
llvm-svn: 65739
 2009-03-01 00:24:40 +00:00
Chris Lattner
f270618038 Fix a long-standing bug and misfeature of the disassembler: when dealing with a 
stripped .bc file, it didn't make any attempt to try to reuse anonymous types.
This causes an amazing type explosion due to types getting duplicated everywhere
they are referenced and other problems.

This also caused correctness issues, because opaque types are unique for each time
they are uttered in the file.  This means that stripping a .bc file could produce
a .ll file that could not be assembled (e.g. 2009-02-28-StripOpaqueName.ll).

This patch fixes both of these issues.

llvm-svn: 65738
 2009-03-01 00:03:38 +00:00
Chris Lattner
d3bb67a595 one less space, fixes failure with rebuilt llvm-gcc. 
llvm-svn: 65728
 2009-02-28 22:20:02 +00:00
Bill Wendling
0b35200185 There is a way to specify targets that should succeed. It's the "XTARGET" 
keyword.

llvm-svn: 65692
 2009-02-28 12:11:01 +00:00
Evan Cheng
9c3ce7905e Last commit accidentially deleted this code. 
llvm-svn: 65679
 2009-02-28 06:02:14 +00:00
Stuart Hastings
2df75807ab Unable to say "TARGET: *-*-darwin*"; falling back to "XFAIL: linux,ia64,alpha,sparc". 
llvm-svn: 65667
 2009-02-28 00:56:37 +00:00
Stuart Hastings
ccf3b20973 Testcase to insure C strings go to the cstring 
section. Darwin-specific.

llvm-svn: 65655
 2009-02-27 22:35:12 +00:00
Rafael Espindola
880e63bf01 Refactor TLS code and add some tests. The tests and expected results are: 
pic |  declaration | linkage  | visibility |

!pic |  declaration | external | default    | tls1.ll     tls2.ll     | local exec
 pic |  declaration | external | default    | tls1-pic.ll tls2-pic.ll | general dynamic
!pic | !declaration | external | default    | tls3.ll     tls4.ll     | initial exec
 pic | !declaration | external | default    | tls3-pic.ll tls4-pic.ll | general dynamic

!pic |  declaration | external | hidden     | tls7.ll     tls8.ll     | local exec
 pic |  declaration | external | hidden     | X                       | local dynamic
!pic | !declaration | external | hidden     | tls9.ll     tls10.ll    | local exec
 pic | !declaration | external | hidden     | X                       | local dynamic

!pic |  declaration | internal | default    | tls5.ll     tls6.ll     | local exec
 pic |  declaration | internal | default    | X                       | local dynamic

The ones marked with an X have not been implemented since local dynamic is not implemented.

llvm-svn: 65632
 2009-02-27 13:37:18 +00:00
Evan Cheng
257e065df6 Make sure this test passes on linux-ppc. 
llvm-svn: 65600
 2009-02-27 00:51:50 +00:00
Dan Gohman
9385e139d0 Update another test for the LoopInfo::print changes. 
llvm-svn: 65598
 2009-02-27 00:20:19 +00:00
Dan Gohman
06c6037d9f Update this test for the LoopInfo::print changes. 
llvm-svn: 65597
 2009-02-27 00:17:49 +00:00
Evan Cheng
0ca6e3dba5 MachineLICM CSE should match destination register classes; avoid hoisting implicit_def's. 
llvm-svn: 65592
 2009-02-27 00:02:22 +00:00
Chris Lattner
1f9a1fc2dd make sure that make fully evaluates variables when determining how compile_c and 
friends should work.  This fixes 2006-11-30-Pubnames.cpp and friends on darwin
with the new -mmacosx-version-min change.

llvm-svn: 65564
 2009-02-26 19:19:26 +00:00
Zhou Sheng
670d50e102 Ignore dbg info intrinsics when folding conditional branch to 
conditional branch predecessors.

llvm-svn: 65509
 2009-02-26 06:56:37 +00:00
Evan Cheng
4014a9a5b8 ADDS{D|S}rr_Int and MULS{D|S}rr_Int are not commutable. The users of these intrinsics expect the high bits will not be modified. 
llvm-svn: 65499
 2009-02-26 03:12:02 +00:00
Evan Cheng
86fc9440db The last commit was overly conservative. It's ok to reuse value that's already marked livein. 
llvm-svn: 65498
 2009-02-26 03:02:21 +00:00
Julien Lerouge
980b081d2a Fix a typo that prevents hello.mm from running (and runs hello.m twice). 
llvm-svn: 65493
 2009-02-26 00:16:33 +00:00
Evan Cheng
ec34226c2b Revert BuildVectorSDNode related patches: 65426, 65427, and 65296. 
llvm-svn: 65482
 2009-02-25 22:49:59 +00:00
Chris Lattner
1443cb8f77 Fix PR3667 
llvm-svn: 65464
 2009-02-25 18:20:01 +00:00
Duncan Sands
4111c9d34c Check that records with a known constant size are not 
copied field by LLVM field if the record has a variable
sized field in it.  The problem is that the LLVM field
will not completely cover the variable sized gcc field.

llvm-svn: 65463
 2009-02-25 18:10:49 +00:00
Zhou Sheng
241d74737b Don't block basic block with only SwitchInst to fold into predecessors. 
llvm-svn: 65456
 2009-02-25 15:34:27 +00:00
Dan Gohman
dd9c79d45b Rename ScalarEvolution's getIterationCount to getBackedgeTakenCount, 
to more accurately describe what it does. Expand its doxygen comment
to describe what the backedge-taken count is and how it differs
from the actual iteration count of the loop. Adjust names and
comments in associated code accordingly.

llvm-svn: 65382
 2009-02-24 18:55:53 +00:00
Bill Wendling
0d8316c5e0 - Use the "Fast" flag instead of "OptimizeForSize" to determine whether to emit 
a DBG_LABEL or not. We want to fall back to the original way of emitting debug
  info when we're in -O0/-fast mode.
- Add plumbing in to pass the "Fast" flag to places that need it.
- XFAIL DebugInfo/deaddebuglabel.ll. This is finding 11 labels instead of 8. I
  need to investigate still.

llvm-svn: 65367
 2009-02-24 02:35:30 +00:00
Dan Gohman
486728ef53 Add a testcase for the problem fixed in r65289. 
llvm-svn: 65365
 2009-02-24 02:17:42 +00:00
Dan Gohman
1197d46ccf Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simple 
ashr instcombine to help expose this code. And apply the fix to
SelectionDAG's copy of this code too.

llvm-svn: 65364
 2009-02-24 02:00:40 +00:00
Bill Wendling
0d306fc85f Un-XFAIL this test. 
llvm-svn: 65355
 2009-02-24 00:37:28 +00:00
Devang Patel
702836b2dd 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

llvm-svn: 65353
 2009-02-24 00:05:16 +00:00
Dan Gohman
1d93a1d2cb 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.

llvm-svn: 65347
 2009-02-23 23:20:35 +00:00
Dan Gohman
3766eeea36 Fast-isel can't do TLS yet, so it should fall back to SDISel 
if it sees TLS addresses.

llvm-svn: 65341
 2009-02-23 22:03:08 +00:00
Dan Gohman
c1229a3a86 Use the -stack-alignment option instead of using a target triple 
for avoiding dynamic stack realignment.

llvm-svn: 65319
 2009-02-23 16:34:46 +00:00
Zhou Sheng
39e360095e Add test case for checkin @r65314. 
llvm-svn: 65315
 2009-02-23 10:15:04 +00:00
Evan Cheng
dd139e795c Only v1i16 (i.e. _m64) is returned via RAX / RDX. 
llvm-svn: 65313
 2009-02-23 09:03:22 +00:00
Nate Begeman
7d9e99560f Make this test use darwin targe triple, to avoid stack traffic on linux. 
llvm-svn: 65312
 2009-02-23 09:03:06 +00:00
Nate Begeman
e0093d2501 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

llvm-svn: 65311
 2009-02-23 08:49:38 +00:00
Scott Michel
3f8637305f 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.

llvm-svn: 65296
 2009-02-22 23:36:09 +00:00
Richard Pennington
72dc7c621e bug 3610: Test case. 
llvm-svn: 65287
 2009-02-22 15:54:44 +00:00
Evan Cheng
41687ff389 If a use operand is marked isKill, don't forget to add kill to its live interval as well. 
llvm-svn: 65279
 2009-02-22 08:35:56 +00:00
Evan Cheng
4385f393f7 Be bug compatible with gcc by returning MMX values in RAX. 
llvm-svn: 65274
 2009-02-22 08:05:12 +00:00
Nick Lewycky
2c8f0fd57f Don't sign extend the char when expanding char -> int during 
load(bitcast(char[4] to i32*)) evaluation.

llvm-svn: 65246
 2009-02-21 20:50:42 +00:00
Anton Korobeynikov
5df82e3e25 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 :)

llvm-svn: 65230
 2009-02-21 11:53:32 +00:00
Evan Cheng
d4dc06f55a 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. 
llvm-svn: 65218
 2009-02-21 03:14:25 +00:00