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224 Commits

Author SHA1 Message Date
Benjamin Kramer
eee88bc5d2 Silence compiler warnings. 
llvm-svn: 90319
 2009-12-02 15:33:44 +00:00
Owen Anderson
b9878ee6b6 Cleanup/remove some parts of the lifetime region handling code in memdep and GVN, 
per Chris' comments.  Adjust testcases to match.

llvm-svn: 90304
 2009-12-02 07:35:19 +00:00
Chris Lattner
e914c0eaa0 rename some variables. 
llvm-svn: 90258
 2009-12-01 21:16:01 +00:00
Chris Lattner
506b858c45 tidy 
llvm-svn: 90257
 2009-12-01 21:15:15 +00:00
Chris Lattner
9c2053b242 fix 255.vortex again, third time's the charm. 
llvm-svn: 90217
 2009-12-01 07:33:32 +00:00
Nick Lewycky
2d32947099 Revert r90107, fixing test/Transforms/GVN/2009-11-29-ReverseMap.ll and the 
llvm-gcc build.

llvm-svn: 90113
 2009-11-30 07:05:51 +00:00
Chris Lattner
4d252d20e8 reapply r90093 with an addition of keeping the forward 
and reverse nonlocal memdep maps in synch, this should
fix 255.vortex.

llvm-svn: 90107
 2009-11-30 02:26:29 +00:00
Chris Lattner
0311ade94c 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

llvm-svn: 90096
 2009-11-29 21:14:59 +00:00
Chris Lattner
52e7715b0b 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.

llvm-svn: 90093
 2009-11-29 21:09:36 +00:00
Nick Lewycky
0a1f25b927 Detabify. 
llvm-svn: 90085
 2009-11-29 18:10:39 +00:00
Nick Lewycky
218a3393f4 Teach memdep to look for memory use intrinsics during dependency queries. Fixes 
PR5574.

llvm-svn: 90045
 2009-11-28 21:27:49 +00:00
Chris Lattner
44da5bd837 Enhance InsertPHITranslatedPointer to be able to return a list of newly 
inserted instructions.  No functionality change until someone starts using it.

llvm-svn: 90039
 2009-11-28 15:39:14 +00:00
Chris Lattner
d5bd369a0f 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.

llvm-svn: 90037
 2009-11-28 14:54:10 +00:00
Chris Lattner
2be52e72ae Rework InsertPHITranslatedPointer to handle the recursive case, this 
fixes PR5630 and sets the stage for the next phase of goodness (testcase
pending).

llvm-svn: 90019
 2009-11-27 22:05:15 +00:00
Chris Lattner
4ee17e1482 recursively phi translate bitcast operands too, for consistency. 
llvm-svn: 90016
 2009-11-27 20:25:30 +00:00
Chris Lattner
2f0354ecf0 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.

llvm-svn: 90013
 2009-11-27 19:11:31 +00:00
Chris Lattner
6d294de548 add comment. 
llvm-svn: 90002
 2009-11-27 08:40:14 +00:00
Chris Lattner
ac323297e0 reduce nesting, no functionality change. 
llvm-svn: 90001
 2009-11-27 08:37:22 +00:00
Chris Lattner
25be93dfed 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? :)

llvm-svn: 89997
 2009-11-27 08:25:10 +00:00
Chris Lattner
a9a76ccf56 Fix phi translation in load PRE to agree with the phi 
translation done by memdep, and reenable gep translation 
again.

llvm-svn: 89992
 2009-11-27 06:31:14 +00:00
Chris Lattner
b018bda665 redisable this, my bootstrap worked because it wasn't an optimized build, whoops. 
llvm-svn: 89991
 2009-11-27 05:53:01 +00:00
Chris Lattner
fb8a718fc3 try again. 
llvm-svn: 89990
 2009-11-27 05:19:56 +00:00
Chris Lattner
14444f5c1a this is causing buildbot failures, disable for now. 
llvm-svn: 89985
 2009-11-27 01:52:22 +00:00
Chris Lattner
5030c6ab21 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

llvm-svn: 89981
 2009-11-27 00:34:38 +00:00
Chris Lattner
4c88e814b8 teach memdep to do trivial PHI translation of GEPs. More to 
come.

llvm-svn: 89979
 2009-11-27 00:07:37 +00:00
Chris Lattner
9bd2136ca3 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

llvm-svn: 89978
 2009-11-26 23:41:07 +00:00
Chris Lattner
c49f5ac7d8 factor some code out into some helper functions. 
llvm-svn: 89975
 2009-11-26 23:18:49 +00:00
Nick Lewycky
663e0a06b0 Remove dead code. While there, also turn a few 'T* ' into 'T *' to match the 
rest of the file.

llvm-svn: 89577
 2009-11-22 02:38:11 +00:00
Owen Anderson
2b2bd28973 Treat lifetime begin/end markers as allocations/frees respectively for the 
purposes for GVN/DSE.

llvm-svn: 85383
 2009-10-28 07:05:35 +00:00
Owen Anderson
fc16e5a98f Be more careful about invariance reasoning on "store" queries. Stores still need 
to depend on Ref and ModRef calls within the invariant region.

llvm-svn: 85380
 2009-10-28 06:30:52 +00:00
Owen Anderson
d0e86d57c1 Add trivial support for the invariance intrinsics to memdep. This logic is 
purely local for now.

llvm-svn: 85378
 2009-10-28 06:18:42 +00:00
Victor Hernandez
f390e04a47 Rename MallocFreeHelper as MemoryBuiltins 
llvm-svn: 85286
 2009-10-27 20:05:49 +00:00
Victor Hernandez
762195bd01 Rename MallocHelper as MallocFreeHelper, since it now also identifies calls to free() 
llvm-svn: 85181
 2009-10-26 23:58:56 +00:00
Victor Hernandez
de5ad42aa1 Remove FreeInst. 
Remove LowerAllocations pass.
Update some more passes to treate free calls just like they were treating FreeInst.

llvm-svn: 85176
 2009-10-26 23:43:48 +00:00
Victor Hernandez
e297149e26 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.

llvm-svn: 84987
 2009-10-24 04:23:03 +00:00
Victor Hernandez
8acf2956b8 Remove AllocationInst. Since MallocInst went away, AllocaInst is the only subclass of AllocationInst, so it no longer is necessary. 
llvm-svn: 84969
 2009-10-23 21:09:37 +00:00
Victor Hernandez
70e8505eb1 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.

llvm-svn: 83931
 2009-10-13 01:42:53 +00:00
Chris Lattner
7e6d56ebc5 Revert r82404, it is causing a bootstrap miscompile. This is very very 
scary, as it indicates a lurking bug. yay.

llvm-svn: 82411
 2009-09-20 22:44:26 +00:00
Chris Lattner
eea16a168a 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.

llvm-svn: 82404
 2009-09-20 21:00:18 +00:00
Victor Hernandez
537d8d99be Enhance analysis passes so that they apply the same analysis to malloc calls as to MallocInst. 
Reviewed by Eli Friedman.

llvm-svn: 82281
 2009-09-18 21:34:51 +00:00
Dan Gohman
1ee6057b21 Make TargetData optional in MemoryDependenceAnalysis. 
llvm-svn: 77727
 2009-07-31 20:53:12 +00:00
Dan Gohman
f3ee7eaac3 Remove an unnecessary header. 
llvm-svn: 77725
 2009-07-31 20:47:45 +00:00
Chris Lattner
370aadabfc factor the 'optimized sort' code out into a static helper function 
and use it from one more place.  Patch by Jakub Staszak!

llvm-svn: 75478
 2009-07-13 17:20:05 +00:00
Chris Lattner
2f0c1c44d5 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.

llvm-svn: 75476
 2009-07-13 17:14:23 +00:00
Chris Lattner
02274a7171 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

llvm-svn: 72403
 2009-05-25 21:28:56 +00:00
Chris Lattner
8eda11bd9d now that you can put a PointerIntPair in a SmallPtrSet, remove some 
hackish workarounds from memdep

llvm-svn: 67971
 2009-03-29 00:24:04 +00:00
Dale Johannesen
f61c8e81bd Debug intriniscs should be skipped when looking 
for a dependency, not terminate the search.

llvm-svn: 66709
 2009-03-11 21:13:01 +00:00
Owen Anderson
f9a9cf96a1 Ignore debug intrinsics when computing dependences. 
llvm-svn: 66399
 2009-03-09 05:12:38 +00:00
Zhou Sheng
c8e5085cd3 Remove this as dbginfo intrinsics has been defined as 
IntrNoMem.

llvm-svn: 66256
 2009-03-06 06:05:01 +00:00
Zhou Sheng
abe4192442 Ignore the debug info intrinsics when looking for dependency through basic block. 
llvm-svn: 66119
 2009-03-05 01:45:43 +00:00