Chris Lattner
e568fa2d29
fix PR5673 by being more careful about pointers to functions.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90369 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-03 01:05:45 +00:00
Chris Lattner
7896c9f436
improve portability to avoid conflicting with std::next in c++'0x.
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Patch by Howard Hinnant!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90365 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-03 00:50:42 +00:00
Benjamin Kramer
0fea11a805
Silence compiler warnings.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90319 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 15:33:44 +00:00
Owen Anderson
9ff5a23186
Cleanup/remove some parts of the lifetime region handling code in memdep and GVN,
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per Chris' comments. Adjust testcases to match.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90304 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 07:35:19 +00:00
Mon P Wang
69a008075b
Fixed an assertion failure for tracking sext of a vector of integers
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90290 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-02 04:59:58 +00:00
Devang Patel
e3a18de4f6
Add utility routine to create subprogram definition entry from subprogram declaration entry.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90282 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01 23:09:02 +00:00
Chris Lattner
1e8de49fe7
rename some variables.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90258 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01 21:16:01 +00:00
Chris Lattner
1ffb70f21d
tidy
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90257 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01 21:15:15 +00:00
Chris Lattner
855d9da596
fix 255.vortex again, third time's the charm.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90217 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01 07:33:32 +00:00
Tobias Grosser
56f4ef3232
Remove ShortNames from getNodeLabel in DOTGraphTraits
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90134 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30 12:38:47 +00:00
Tobias Grosser
a10d598602
Instantiate DefaultDOTGraphTraits
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90133 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30 12:38:13 +00:00
Tobias Grosser
2833fac273
Small PostDominatorTree improvements
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* Do not SEGFAULT if tree entryNode() is NULL
* Print function names in dotty printer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90130 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30 12:06:37 +00:00
Nick Lewycky
f58e86d762
Revert r90107, fixing test/Transforms/GVN/2009-11-29-ReverseMap.ll and the
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llvm-gcc build.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90113 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30 07:05:51 +00:00
Chris Lattner
366429b400
reapply r90093 with an addition of keeping the forward
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and reverse nonlocal memdep maps in synch, this should
fix 255.vortex.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90107 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-30 02:26:29 +00:00
Nick Lewycky
fac554a131
Teach ConstantFolding to do a better job when folding gep(bitcast).
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This permits the devirtualization of llvm.org/PR3100#c9 when compiled by clang.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90099 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 21:40:55 +00:00
Chris Lattner
ae3d24880d
revert this patch for now, it causes failures of:
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LLVM::Transforms/GVN/2009-02-17-LoadPRECrash.ll
LLVM::Transforms/GVN/2009-06-17-InvalidPRE.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90096 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 21:14:59 +00:00
Chris Lattner
1903d97c2c
Fix a really nasty caching bug I introduced in memdep. An entry
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was being added to the Result vector, but not being put in the
cache. This means that if the cache was reused wholesale for a
later query that it would be missing this entry and we'd do an
incorrect load elimination.
Unfortunately, it's not really possible to write a useful
testcase for this, but this unbreaks 255.vortex.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90093 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 21:09:36 +00:00
Nick Lewycky
2eac9493fc
Detabify.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90085 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-29 18:10:39 +00:00
Nick Lewycky
d801c10de6
Teach memdep to look for memory use intrinsics during dependency queries. Fixes
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PR5574.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90045 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28 21:27:49 +00:00
Chris Lattner
dd696052f0
Enhance InsertPHITranslatedPointer to be able to return a list of newly
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inserted instructions. No functionality change until someone starts using it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90039 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28 15:39:14 +00:00
Chris Lattner
ab9530ee5d
implement a FIXME: limit the depth that DecomposeGEPExpression goes the same
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way that getUnderlyingObject does it.
This fixes the 'DecomposeGEPExpression and getUnderlyingObject disagree!'
assertion on sqlite3.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90038 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28 15:12:41 +00:00
Chris Lattner
af7a28939e
enable code to handle un-phi-translatable cases more aggressively:
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if we don't have an address expression available in a predecessor,
then model this as the value being clobbered at the end of the pred
block instead of being modeled as a complete phi translation failure.
This is important for PRE of loads because we want to see that the
load is available in all but this predecessor, and complete phi
translation failure results in not getting any information about
predecessors.
This doesn't do anything until I renable code insertion since PRE
now sees that it is available in all but one predecessors, but can't
insert the addressing in the predecessor that is missing it to
eliminate the redundancy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90037 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-28 14:54:10 +00:00
Chris Lattner
6f7b210b25
Rework InsertPHITranslatedPointer to handle the recursive case, this
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fixes PR5630 and sets the stage for the next phase of goodness (testcase
pending).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90019 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 22:05:15 +00:00
Chris Lattner
5141421e38
recursively phi translate bitcast operands too, for consistency.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90016 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 20:25:30 +00:00
Chris Lattner
11c6bab704
add support for recursive phi translation and phi
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translation of add with immediate. This allows us
to optimize this function:
void test(int N, double* G) {
long j;
G[1] = 1;
for (j = 1; j < N - 1; j++)
G[j+1] = G[j] + G[j+1];
}
to only do one load every iteration of the loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90013 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 19:11:31 +00:00
Chris Lattner
8aee8efc0c
factor some logic out of instcombine into a new SimplifyAddInst method.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90011 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 17:42:22 +00:00
Chris Lattner
9763487bd5
add comment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90002 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 08:40:14 +00:00
Chris Lattner
e95035aea4
reduce nesting, no functionality change.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90001 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 08:37:22 +00:00
Chris Lattner
a650f770d4
limit the recursion depth of GetLinearExpression. This
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fixes a crash analyzing consumer-lame, which had an "%X = add %X, 1"
in unreachable code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90000 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 08:32:52 +00:00
Chris Lattner
616613d7a4
teach GVN's load PRE to insert computations of the address in predecessors
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where it is not available. It's unclear how to get this inserted
computation into GVN's scalar availability sets, Owen, help? :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89997 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 08:25:10 +00:00
Chris Lattner
62deff066c
Fix phi translation in load PRE to agree with the phi
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translation done by memdep, and reenable gep translation
again.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89992 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 06:31:14 +00:00
Chris Lattner
b99be5beac
redisable this, my bootstrap worked because it wasn't an optimized build, whoops.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89991 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 05:53:01 +00:00
Chris Lattner
cca130bb66
try again.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89990 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 05:19:56 +00:00
Chris Lattner
518c988ae9
this is causing buildbot failures, disable for now.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89985 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 01:52:22 +00:00
Chris Lattner
e19e4baf3b
teach phi translation of GEPs to simplify geps like 'gep x, 0'.
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This allows us to compile the example from PR5313 into:
LBB1_2: ## %bb
incl %ecx
movb %al, (%rsi)
movslq %ecx, %rax
movb (%rdi,%rax), %al
testb %al, %al
jne LBB1_2
instead of:
LBB1_2: ## %bb
movslq %eax, %rcx
incl %eax
movb (%rdi,%rcx), %cl
movb %cl, (%rsi)
movslq %eax, %rcx
cmpb $0, (%rdi,%rcx)
jne LBB1_2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89981 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 00:34:38 +00:00
Chris Lattner
c514c1f521
factor some instcombine simplifications for getelementptr out to a new
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SimplifyGEPInst method in InstructionSimplify.h. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89980 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 00:29:05 +00:00
Chris Lattner
304076268a
teach memdep to do trivial PHI translation of GEPs. More to
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come.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89979 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-27 00:07:37 +00:00
Chris Lattner
cc3d0eb483
Teach memdep to phi translate bitcasts. This allows us to compile
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the example in GCC PR16799 to:
LBB1_2: ## %bb1
movl %eax, %eax
subq %rax, %rdi
movq %rdi, (%rcx)
movl (%rdi), %eax
testl %eax, %eax
je LBB1_2
instead of:
LBB1_2: ## %bb1
movl (%rdi), %ecx
subq %rcx, %rdi
movq %rdi, (%rax)
cmpl $0, (%rdi)
je LBB1_2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89978 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 23:41:07 +00:00
Chris Lattner
dc59311c5c
factor some code out into some helper functions.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89975 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 23:18:49 +00:00
Chris Lattner
1ce0eaa25f
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89959 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 18:53:33 +00:00
Chris Lattner
b18004c13c
fix two transposed lines duncan caught and add an explanatory comment.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89958 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 18:35:46 +00:00
Chris Lattner
8fe8ac725b
this todo is resolved.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89957 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 17:14:10 +00:00
Chris Lattner
e405c64f6b
move DecomposeGEPExpression out into ValueTracking.cpp
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89956 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 17:12:50 +00:00
Chris Lattner
fa3966881f
teach GetLinearExpression to be a bit more aggressive.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89955 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 17:00:01 +00:00
Chris Lattner
5369250b73
resolve a fixme. I haven't figured out how to write a testcase
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to exercise this though.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89954 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 16:52:32 +00:00
Chris Lattner
5d5261c819
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89952 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 16:26:43 +00:00
Chris Lattner
f6ac4d9dad
teach basicaa that A[i] != A[i+1].
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89951 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 16:18:10 +00:00
Chris Lattner
d84eb911a9
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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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89922 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 02:17:34 +00:00
Chris Lattner
23e2a5b2ff
Generalize DecomposeGEPExpression to exactly handle what Value::getUnderlyingObject does (when TD is around). This allows us to avoid calling DecomposeGEPExpression unless the ultimate alias check we care about passes, speedup up BasicAA a bit.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89920 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 02:14:59 +00:00
Chris Lattner
4e91ee7a2a
Implement a new DecomposeGEPExpression method, which decomposes a GEP into a list of scaled offsets. Use this to eliminate some previous ad-hoc code which was subtly broken (it assumed all Constant*'s were non-zero, but strange constant express could be zero).
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89915 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26 02:13:03 +00:00