4deda530c2
Add another rdar number.
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llvm-svn: 124125
2011-01-24 17:54:01 +00:00
44da55b7be
Teach BasicAA to return PartialAlias in cases where both pointers
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are pointing to the same object, one pointer is accessing the entire
object, and the other is access has a non-zero size. This prevents
TBAA from kicking in and saying NoAlias in such cases.
llvm-svn: 123775
2011-01-18 21:16:06 +00:00
16e42128c2
fix rdar://8813415 - a miscompilation of 164.gzip that loop-idiom
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exposed. It turns out to be a latent bug in basicaa, scary.
llvm-svn: 122772
2011-01-03 21:03:33 +00:00
12fa3c6a94
filecheckize
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llvm-svn: 122771
2011-01-03 21:01:26 +00:00
0a2c416894
Move Sub simplifications and additional Add simplifications out of
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instcombine and into InstructionSimplify.
llvm-svn: 121861
2010-12-15 14:07:39 +00:00
d513faf41f
remove fixme comment too.
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llvm-svn: 120493
2010-11-30 23:25:01 +00:00
370797a1fb
check in *all* files. This is now handled by my previous DSE commit.
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llvm-svn: 120492
2010-11-30 23:23:59 +00:00
22e0e1cecb
Delete unneeded ssp attributes.
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llvm-svn: 118836
2010-11-11 21:08:46 +00:00
02538ac4d3
Make BasicAliasAnalysis a normal AliasAnalysis implementation which
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does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.
Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.
Update tests to explicitly request -basicaa.
llvm-svn: 116720
2010-10-18 18:04:47 +00:00
ab3a128582
PR7959: Handle negative scales in GEPs correctly in BasicAA for non-64-bit
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targets.
llvm-svn: 114015
2010-09-15 20:08:03 +00:00
bb451461ec
remove some noise from tests.
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llvm-svn: 112889
2010-09-02 22:35:33 +00:00
7983340465
Fix constant-over-index.ll test on windows.
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llvm-svn: 112483
2010-08-30 15:08:02 +00:00
3decde9305
refix PR1143 by making basicaa analyze zexts of indices aggresively,
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which I broke with a recent patch.
llvm-svn: 111452
2010-08-18 23:09:49 +00:00
a25c05ed15
fix a buggy test
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llvm-svn: 111354
2010-08-18 04:55:12 +00:00
a33edcb56c
fix PR7589: In brief:
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gep P, (zext x) != gep P, (sext x)
DecomposeGEPExpression was getting this wrong, confusing
basicaa.
llvm-svn: 111352
2010-08-18 04:28:19 +00:00
c8e38eb60b
filecheckize and detrivialize.
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llvm-svn: 111350
2010-08-18 04:25:43 +00:00
e68958fcdf
Implement a proper getModRefInfo for va_arg.
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llvm-svn: 110458
2010-08-06 18:24:38 +00:00
884dd752c3
Implement AccessesArguments checking in the two-callsite form
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of BasicAA::getModRefInfo. This allows BasicAA to say that two
memset calls to non-aliasing memory locations don't interfere.
llvm-svn: 110393
2010-08-05 23:34:50 +00:00
26ef7c7ab7
Fix memdep's code for reasoning about dependences between two calls. A Ref
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response from getModRefInfo is not useful here. Instead, check for identical
calls only in the NoModRef case.
Reapply r110270, and strengthen it to compensate for the memdep changes.
When both calls are readonly, there is no dependence between them.
llvm-svn: 110382
2010-08-05 22:09:15 +00:00
554b012f67
Revert r110270 for now. It appears to uncover a memdep bug.
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llvm-svn: 110293
2010-08-05 00:43:10 +00:00
109561845b
The trouble with testing for "ModRef" and "NoModRef" is that
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one is a suffix of the other, and FileCheck accepts superstrings.
Adjust the output to avoid this problem.
llvm-svn: 110280
2010-08-04 23:37:55 +00:00
bd33dab633
The two-callsite form of AliasAnalysis::getModRefInfo is documented
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to return Ref if the left callsite only reads memory read or written
by the right callsite; fix BasicAliasAnalysis to implement this.
Add AliasAnalysisEvaluator support for testing the two-callsite
form of getModRefInfo.
llvm-svn: 110270
2010-08-04 22:56:29 +00:00
00ef93258a
Remove interprocedural-basic-aa and associated code. The AliasAnalysis
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interface needs implementations to be consistent, so any code which
wants to support different semantics must use a different interface.
It's not currently worthwhile to add a new interface for this new
concept.
Document that AliasAnalysis doesn't support cross-function queries.
llvm-svn: 107776
2010-07-07 14:27:09 +00:00
84f90a387d
Remove context sensitivity concerns from interprocedural-basic-aa, and
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make it more aggressive in cases where both pointers are known to live
in the same function.
llvm-svn: 107420
2010-07-01 20:08:40 +00:00
9bbd007f15
Add a few more interesting testcases.
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llvm-svn: 107177
2010-06-29 18:17:11 +00:00
0824affeff
Add an Intraprocedural form of BasicAliasAnalysis, which aims to
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properly handles instructions and arguments defined in different
functions, or across recursive function iterations.
llvm-svn: 107109
2010-06-29 00:50:39 +00:00
7c34ece501
Fix Value::stripPointerCasts and BasicAA to avoid trouble on
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code in unreachable blocks, which have have use-def cycles.
This fixes PR7514.
llvm-svn: 107071
2010-06-28 21:16:52 +00:00
cb45bd9cb3
Pointers to zero-sized objects don't point to overlapping objects.
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llvm-svn: 100789
2010-04-08 18:11:50 +00:00
3ae2dd2ba5
add newlines at the end of files.
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llvm-svn: 100705
2010-04-07 22:53:17 +00:00
c576ee9040
Reapply address space patch after fixing an issue in MemCopyOptimizer.
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Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
llvm-svn: 100304
2010-04-04 03:10:48 +00:00
999c1b927b
Revert r100191 since it breaks objc in clang
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llvm-svn: 100199
2010-04-02 18:43:02 +00:00
a972ab8564
Reapply address space patch after fixing an issue in MemCopyOptimizer.
...
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
llvm-svn: 100191
2010-04-02 18:04:15 +00:00
6f7fd28824
Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots.
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llvm-svn: 99948
2010-03-30 22:27:04 +00:00
7460571381
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
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e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
A update of langref will occur in a subsequent checkin.
llvm-svn: 99928
2010-03-30 20:55:56 +00:00
fb4193625a
Delete useless trailing semicolons.
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llvm-svn: 92740
2010-01-05 17:55:26 +00:00
850a3cd905
gvn is optimizing this better now.
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llvm-svn: 90696
2009-12-06 04:16:05 +00:00
5fe97e7aca
@test9 is a testcase for r89958. Before 89958, we misanalyzed the
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first expression as P+4+4*i which we considered to possibly alias
P+4*j. Now we correctly analyze the former one as P+1+4*i.
@test10 is a sanity test that verfies that we know that P+4+4*i != P+4*i.
llvm-svn: 89960
2009-11-26 19:25:46 +00:00
1bf7ff704a
Implement PR1143 (at -m64) by making basicaa look through extensions. We
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previously already handled it at -m32 because there were no i32->i64
extensions for addressing.
llvm-svn: 89959
2009-11-26 18:53:33 +00:00
631c5b2cb9
teach GetLinearExpression to be a bit more aggressive.
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llvm-svn: 89955
2009-11-26 17:00:01 +00:00
29bc8a91d3
Teach basicaa that x|c == x+c when the c bits of x are clear. This
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allows us to compile the example in readme.txt into:
LBB1_1: ## %bb
movl 4(%rdx,%rax), %ecx
movl %ecx, %esi
imull (%rdx,%rax), %esi
imull %esi, %ecx
movl %esi, 8(%rdx,%rax)
imull %ecx, %esi
movl %ecx, 12(%rdx,%rax)
movl %esi, 16(%rdx,%rax)
imull %ecx, %esi
movl %esi, 20(%rdx,%rax)
addq $16, %rax
cmpq $4000, %rax
jne LBB1_1
instead of:
LBB1_1:
movl (%rdx,%rax), %ecx
imull 4(%rdx,%rax), %ecx
movl %ecx, 8(%rdx,%rax)
imull 4(%rdx,%rax), %ecx
movl %ecx, 12(%rdx,%rax)
imull 8(%rdx,%rax), %ecx
movl %ecx, 16(%rdx,%rax)
imull 12(%rdx,%rax), %ecx
movl %ecx, 20(%rdx,%rax)
addq $16, %rax
cmpq $4000, %rax
jne LBB1_1
GCC (4.2) doesn't seem to be able to eliminate the loads in this
testcase either, it generates:
L2:
movl (%rdx), %eax
imull 4(%rdx), %eax
movl %eax, 8(%rdx)
imull 4(%rdx), %eax
movl %eax, 12(%rdx)
imull 8(%rdx), %eax
movl %eax, 16(%rdx)
imull 12(%rdx), %eax
movl %eax, 20(%rdx)
addl $4, %ecx
addq $16, %rdx
cmpl $1002, %ecx
jne L2
llvm-svn: 89952
2009-11-26 16:26:43 +00:00
12dacdd359
teach basicaa that A[i] != A[i+1].
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llvm-svn: 89951
2009-11-26 16:18:10 +00:00
453751031a
rename test
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llvm-svn: 89950
2009-11-26 16:08:41 +00:00
7a5b56aca9
Change the other half of aliasGEP (which handles GEP differencing) to use DecomposeGEPExpression. This dramatically simplifies and shrinks the code by eliminating the horrible CheckGEPInstructions method, fixes a miscompilation ( @test3 ) and makes the code more aggressive. In particular, we now handle the @test4 case, which is reduced from the SmallPtrSet constructor. Missing this caused us to emit a variable length memset instead of a fixed size one.
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llvm-svn: 89922
2009-11-26 02:17:34 +00:00
0d23076adf
add a new random feature test
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llvm-svn: 89921
2009-11-26 02:16:28 +00:00
db1e9f1290
remove a silly condition that doesn't make a lot of sense anymore.
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llvm-svn: 89601
2009-11-22 16:15:59 +00:00
90fedc6ef9
Make opt default to not adding a target data string and update tests that depend on target data to supply it within the test
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llvm-svn: 85900
2009-11-03 15:29:06 +00:00
3b7ba5f35b
Teach BasicAA how to analyze Select instructions, and make it more
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aggressive on PHI instructions.
llvm-svn: 85158
2009-10-26 21:55:43 +00:00
1353518b6c
fix test
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llvm-svn: 84405
2009-10-18 05:03:00 +00:00
d2b3a4f7b8
tighten up test3, add test3a for the converse
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transform, which isn't happening yet.
llvm-svn: 84402
2009-10-18 04:55:26 +00:00
457ecd5dab
tighten test2, add a test that it doesn't get transformed in the invalid edge case.
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llvm-svn: 84401
2009-10-18 04:50:18 +00:00
Dan Gohman