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855d9da596
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170 Commits

Author SHA1 Message Date
Chris Lattner
855d9da596 fix 255.vortex again, third time's the charm. 
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
Nick Lewycky
f58e86d762 Revert r90107, fixing test/Transforms/GVN/2009-11-29-ReverseMap.ll and the 
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 
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
Chris Lattner
ae3d24880d revert this patch for now, it causes failures of: 
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 
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. 
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 
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 
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
af7a28939e enable code to handle un-phi-translatable cases more aggressively: 
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 
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. 
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 
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
9763487bd5 add comment. 
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. 
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
616613d7a4 teach GVN's load PRE to insert computations of the address in predecessors 
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 
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. 
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. 
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. 
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'. 
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
304076268a teach memdep to do trivial PHI translation of GEPs. More to 
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 
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. 
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
Nick Lewycky
f27f115ef5 Remove dead code. While there, also turn a few 'T* ' into 'T *' to match the 
rest of the file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89577 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-22 02:38:11 +00:00
Owen Anderson
b62f792e78 Treat lifetime begin/end markers as allocations/frees respectively for the 
purposes for GVN/DSE.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85383 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 07:05:35 +00:00
Owen Anderson
a85a66423d Be more careful about invariance reasoning on "store" queries. Stores still need 
to depend on Ref and ModRef calls within the invariant region.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85380 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 06:30:52 +00:00
Owen Anderson
4bc737c5ef Add trivial support for the invariance intrinsics to memdep. This logic is 
purely local for now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85378 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-28 06:18:42 +00:00
Victor Hernandez
f006b183e2 Rename MallocFreeHelper as MemoryBuiltins 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85286 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-27 20:05:49 +00:00
Victor Hernandez
f2becca90b Rename MallocHelper as MallocFreeHelper, since it now also identifies calls to free() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85181 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 23:58:56 +00:00
Victor Hernandez
046e78ce55 Remove FreeInst. 
Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85176 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 23:43:48 +00:00
Victor Hernandez
66284e063a Auto-upgrade free instructions to calls to the builtin free function. 
Update all analysis passes and transforms to treat free calls just like FreeInst.
Remove RaiseAllocations and all its tests since FreeInst no longer needs to be raised.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84987 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-24 04:23:03 +00:00
Victor Hernandez
7b929dad59 Remove AllocationInst. Since MallocInst went away, AllocaInst is the only subclass of AllocationInst, so it no longer is necessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84969 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-23 21:09:37 +00:00
Victor Hernandez
5c78736f85 Memory dependence analysis was incorrectly stopping to scan for stores to a pointer at bitcast uses of a malloc call. 
It should continue scanning until the malloc call, and this patch fixes that.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83931 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-13 01:42:53 +00:00
Chris Lattner
66364346e0 Revert r82404, it is causing a bootstrap miscompile. This is very very 
scary, as it indicates a lurking bug. yay.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82411 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-20 22:44:26 +00:00
Chris Lattner
386251341f improve memdep to eliminate bitcasts (and aliases, and noop geps) 
early for the stated reasons: this allows it to find more 
equivalences and depend less on code layout.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82404 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-20 21:00:18 +00:00
Victor Hernandez
46e8312fb7 Enhance analysis passes so that they apply the same analysis to malloc calls as to MallocInst. 
Reviewed by Eli Friedman.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82281 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-18 21:34:51 +00:00
Dan Gohman
f581213bfb Make TargetData optional in MemoryDependenceAnalysis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77727 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-31 20:53:12 +00:00
Dan Gohman
cc726599ae Remove an unnecessary header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77725 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-31 20:47:45 +00:00
Chris Lattner
a2f55dd388 factor the 'optimized sort' code out into a static helper function 
and use it from one more place.  Patch by Jakub Staszak!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75478 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-13 17:20:05 +00:00
Chris Lattner
6fbc1969e9 Move the re-sort of invalidated NonLocalPointerDeps cache earlier 
so that all code paths get it.  PR4256 was about a case where the
phi translation loop would find all preds in the Visited cache, so
it could get by without re-sorting the NonLocalPointerDeps cache.
Fix this by resorting it earlier, there is no reason not to do this.

This patch inspired by Jakub Staszak's patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75476 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-13 17:14:23 +00:00
Chris Lattner
ab9cf1282b make memdep use the getModRefInfo method for stores instead of the 
low-level alias() method, allowing it to reason more aggressively
about pointers into constant memory.  PR4189


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72403 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-25 21:28:56 +00:00
Chris Lattner
6a0dcc1077 now that you can put a PointerIntPair in a SmallPtrSet, remove some 
hackish workarounds from memdep


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67971 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 00:24:04 +00:00
Dale Johannesen
497cb6fd4c Debug intriniscs should be skipped when looking 
for a dependency, not terminate the search.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66709 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-11 21:13:01 +00:00
Owen Anderson
f6cec85a4b Ignore debug intrinsics when computing dependences. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66399 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-09 05:12:38 +00:00
Zhou Sheng
7157228a58 Remove this as dbginfo intrinsics has been defined as 
IntrNoMem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66256 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-06 06:05:01 +00:00
Zhou Sheng
9b89f0de12 Ignore the debug info intrinsics when looking for dependency through basic block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66119 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-05 01:45:43 +00:00
Chris Lattner
95900f2dda fix two more cases where we could let the NLPDI cache get unsorted. 
With this, sqlite3 now passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62839 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-23 07:12:16 +00:00
Chris Lattner
4433a09b9f Unconditionally reset 'cache' to zero, even if we don't need to resort it. 
This avoids using a dangling pointer.

Reset NumSortedEntries after restoring Cache to avoid extraneous sorts.
This fixes the reduced sqlite3 testcase, but apparently not the whole app.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62838 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-23 06:48:41 +00:00
Chris Lattner
b54bfc2636 a minor tweak to my previous patch, handle the invalidation case 
when there are multiple iterations of the loop.  This fixes PR3375.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62822 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-23 00:27:03 +00:00
Chris Lattner
12a7db3830 Fix PR3358, a really nasty bug where recursive phi translated 
analyses could be run without the caches properly sorted.  This
can fix all sorts of weirdness.  Many thanks to Bill for coming
up with the 'issorted' verification idea.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62757 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-22 07:04:01 +00:00