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Author SHA1 Message Date
Dan Gohman
22f6526081 Fix a minor inconsistency. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90165 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 23:33:37 +00:00
Jakob Stoklund Olesen
ce7a663140 New virtual registers created for spill intervals should inherit allocation hints from the original register. 
This helps us avoid silly copies when rematting values that are copied to a physical register:

leaq	_.str44(%rip), %rcx
movq	%rcx, %rsi
call	_strcmp

becomes:

leaq	_.str44(%rip), %rsi
call	_strcmp

The coalescer will not touch the movq because that would tie down the physical register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90163 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 22:55:54 +00:00
Bob Wilson
3858225afc Reprioritize tests for tail duplication to be aggressive about indirect 
branches even when optimizing for code size.  Unless we find evidence to the
contrary in the future, the special treatment for indirect branches does not
have a significant effect on code size, and performance still matters with -Os.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90147 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 18:56:45 +00:00
Bob Wilson
15217e63bc Remove isProfitableToDuplicateIndirectBranch target hook. It is profitable 
for all the processors where I have tried it, and even when it might not help
performance, the cost is quite low.  The opportunities for duplicating
indirect branches are limited by other factors so code size does not change
much due to tail duplicating indirect branches aggressively.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90144 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 18:35:03 +00:00
Bob Wilson
afa1df467b Fix some more ARM unified syntax warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90141 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 17:47:19 +00:00
Tobias Grosser
ab01069fcd Fix last DOTGraphTraits problems in CompilationGraph. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90136 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 13:34:51 +00:00
Tobias Grosser
b5eedf2c1c Remove forgotten ShortNames in Trie and CompilationGraph 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90135 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 13:14:13 +00:00
Tobias Grosser
56f4ef3232 Remove ShortNames from getNodeLabel in DOTGraphTraits 
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 
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 
* 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 
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
Mon P Wang
cd6e725f21 Added support to allow clients to custom widen. For X86, custom widen vectors for 
divide/remainder since these operations can trap by unroll them and adding undefs
for the resulting vector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90108 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-30 02:42:02 +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
Nick Lewycky
fac554a131 Teach ConstantFolding to do a better job when folding gep(bitcast). 
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
Benjamin Kramer
e6f329476c Revert r90089 for now, it's breaking selfhost. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90097 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 21:17:48 +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
Benjamin Kramer
4aac07e898 Fix two FIXMEs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90089 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 20:29:30 +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
Benjamin Kramer
18eaefd25e Remove dead returns. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90083 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 17:42:58 +00:00
Kovarththanan Rajaratnam
d614673bb8 This patch ensures that Path::GetMainExecutable is able to handle the 
case where realpath() fails. When this occurs we segfault trying to
create a std::string from a NULL pointer.

Fixes PR5635.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90082 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 17:19:48 +00:00
Chris Lattner
cd188e9665 add testcases for the foo_with_overflow op xforms added recently and 
fix bugs exposed by the tests.  Testcases from Alastair Lynn!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90056 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 02:57:29 +00:00
Chris Lattner
d4137f40da update and consolidate the load pre notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90050 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 02:19:52 +00:00
Chris Lattner
3f40e23392 Implement PR5634. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90046 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-29 00:51:17 +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
0c264b16b0 reenable load address insertion in load pre. This allows us to 
handle cases like this:
void test(int N, double* G) {
  long j;
  for (j = 1; j < N - 1; j++)
      G[j+1] = G[j] + G[j+1];
}

where G[1] isn't live into the loop.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90041 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-28 16:08:18 +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
ab9530ee5d implement a FIXME: limit the depth that DecomposeGEPExpression goes the same 
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: 
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
971fd57f7d disable value insertion for now, I need to figure out how 
to inform GVN about the newly inserted values.  This fixes 
PR5631.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90022 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 22:50:07 +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
Nick Lewycky
807d2fa1eb Oops! Fix bug introduced in my recent cleanup change. Thanks to Tobias Grosser 
for pointing this out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90015 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 19:57:53 +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
8aee8efc0c factor some logic out of instcombine into a new SimplifyAddInst method. 
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
1d159838a3 add a deadargelim note. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90009 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 17:12:30 +00:00
Chris Lattner
6d94926a52 This testcase is actually only partially redundant, and requires 
the FIXME I added yesterday to be implemented.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90008 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 16:53:57 +00:00
Chris Lattner
8976e5950f fix PR5436 by making the 'simple' case of SRoA not promote out of range 
array indexes.  The "complex" case of SRoA still handles them, and correctly.

This fixes a weirdness where we'd correctly avoid transforming A[0][42] if
the 42 was too large, but we'd only do it if it was one gep, not two separate
ones.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90007 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 16:37:41 +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
a650f770d4 limit the recursion depth of GetLinearExpression. This 
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 
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
20ce7c0ded this (and probably several others) are now done. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89982 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-27 00:35:04 +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
c514c1f521 factor some instcombine simplifications for getelementptr out to a new 
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 
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
Nick Lewycky
dbee4b3be5 Fix typo spotted by Gabor Greif. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89976 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 23:19:05 +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
2353122a3c Clean up file, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89974 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 22:54:26 +00:00
Chris Lattner
5bda3792b4 Add a hack for PR5601, a crash on obsolete syntax that we plan to 
remove in LLVM 3.0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89973 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 22:48:23 +00:00
Chris Lattner
998e25a143 fix crash on Transforms/InstCombine/intrinsics.ll introduced by r89970 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89972 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 22:08:06 +00:00
Chris Lattner
21f83a2f95 Fix PR5471 by removing an instcombine xform. Some pieces of the code 
generates store to undef and some generates store to null as the idiom
for undefined behavior.  Since simplifycfg zaps both, don't remove the
undefined behavior in instcombine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89971 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 22:04:42 +00:00
Chris Lattner
2bbac75e5a implement a bunch of xforms for overflow intrinsics, based on a patch 
by Alastair Lynn.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89970 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 21:42:47 +00:00
Bob Wilson
2d521e51ac Rename new TailDuplicationPass to avoid name conflict with the old one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89968 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 21:38:41 +00:00
Chris Lattner
1ce0eaa25f Implement PR1143 (at -m64) by making basicaa look through extensions. We 
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. 
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. 
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 
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. 
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 
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 
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]. 
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. 
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. 
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). 
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
Chris Lattner
539c9b99c2 Use GEPOperator more pervasively to simplify code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89914 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 02:11:08 +00:00
Chris Lattner
9c6a0dcf0e update some notes slightly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89913 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 01:51:18 +00:00
Chris Lattner
11fe72661d remove some redundant braces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89912 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 01:50:12 +00:00
Evan Cheng
40ea0e22b2 When all defs of a vr are implicit_def, delete all of the defs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89905 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 00:32:36 +00:00
Bob Wilson
15acadde5f Split tail duplication into a separate pass. This is needed to avoid 
running tail duplication when doing branch folding for if-conversion, and
we also want to be able to run tail duplication earlier to fix some
reg alloc problems.  Move the CanFallThrough function from BranchFolding
to MachineBasicBlock so that it can be shared by TailDuplication.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89904 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-26 00:32:21 +00:00
Viktor Kutuzov
308f6630a3 Rollback changes r89516: Added two SubtargetFeatures::AddFeatures methods, which accept a comma-separated string or already parsed command line parameters as input, and some code re-factoring to use these new methods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89893 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 22:44:18 +00:00
Evan Cheng
e7c9195706 ProcessImplicitDefs should watch out for invalidated iterator and extra implicit operands on copies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89880 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 21:13:39 +00:00
Bob Wilson
de9b1dae37 Tail duplicate indirect branches for PowerPC, too. 
With the testcase for pr3120, the "threaded interpreter" runtime decreases
from 1788 to 1413 with this change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89877 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 19:57:14 +00:00
Benjamin Kramer
1c3451fc99 Avoid some possibly unsafe uses of StringRef::data(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89873 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 18:26:09 +00:00
Devang Patel
65dbc909f5 Use StringRef (again) in DebugInfo interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89866 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 17:36:49 +00:00
Bob Wilson
4a66e5bfc2 Based on the testcase for pr3120, running on my MacPro with Xeon processors, 
it is definitely profitable to tail duplicate indirect branches for x86.
This is likely to be true to various degrees for all modern x86 processors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89865 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 17:27:53 +00:00
Bruno Cardoso Lopes
d71cebf575 Support PIC loading of constant pool entries 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89863 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 12:17:58 +00:00
Daniel Dunbar
5f9b9efa17 Sketch structure for X86 disassembler. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89850 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 06:53:08 +00:00
Edward O'Callaghan
e49a8e4db9 API change Path::isSpecialFile to Path::isRegularFile, improve semantics in regards to comments from 89765 post review. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89848 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 06:32:19 +00:00
Douglas Gregor
b3587cfb3b Perform explicit instantiations in the proper namespace, since Clang diagnoses this ill-formity. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89846 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 06:04:18 +00:00
Edward O'Callaghan
25798439da Reverting patch in revision 89758, initial attempt at fixing PR5373 has proven to be bogus. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89844 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 05:38:41 +00:00
Bruno Cardoso Lopes
37fd537544 Use endianess dependent offsets for load/store of doubles when 
using two swc/lwc instead of sdc/ldc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89826 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 01:05:25 +00:00
Dale Johannesen
0106a0aafe Fix compiler warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89824 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 00:58:21 +00:00
Bruno Cardoso Lopes
5f222b18e3 Only include in the callee saved regs the sub registers to avoid 
unnecessary save/restore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89823 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 00:47:43 +00:00
Bruno Cardoso Lopes
302525b234 Add proper emission of load/store double to stack slots for mips1 targets! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89821 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 00:36:00 +00:00
Devang Patel
7dbc610309 Revert r89803. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89819 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-25 00:31:13 +00:00
Bob Wilson
f8c4cfb7cc Refactor target hook for tail duplication as requested by Chris. 
Make tail duplication of indirect branches much more aggressive (for targets
that indicate that it is profitable), based on further experience with
this transformation.  I compiled 3 large applications with and without
this more aggressive tail duplication and measured minimal changes in code
size.  ("size" on Darwin seems to round the text size up to the nearest
page boundary, so I can only say that any code size increase was less than
one 4k page.) Radar 7421267.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89814 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 23:35:49 +00:00
Dale Johannesen
f7801b493e Do not store R31 into the caller's link area on PPC. 
This violates the ABI (that area is "reserved"), and
while it is safe if all code is generated with current
compilers, there is some very old code around that uses
that slot for something else, and breaks if it is stored
into.  Adjust testcases looking for current behavior.
I've verified that the stack frame size is right in all
testcases, whether it changed or not.  7311323.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89811 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 22:59:02 +00:00
Devang Patel
eac79170d2 Enable debug info for ppc-darwin. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89803 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 21:38:54 +00:00
Devang Patel
e9a059714e Use StringRef instead of std::string in DIEString. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89793 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 19:42:17 +00:00
Devang Patel
f5a7a2c84a Remove DebugLabelFolder pass. It is not used by dwarf writer anymore. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89790 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 19:37:07 +00:00
Devang Patel
f3a0376a56 Swith to pubtypes section before emitting pub types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89787 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 19:18:41 +00:00
Daniel Dunbar
98e46d81c4 Remove bogus error handling code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89786 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 19:03:33 +00:00
Edward O'Callaghan
d41e944501 Provide Path::isSpecialFile interface for PR5568. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89765 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 15:19:10 +00:00
Edward O'Callaghan
de8d3b73c8 Fix for PR5373, Credit to Jakub Staszak. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89758 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-24 11:51:52 +00:00