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86 Commits

Author SHA1 Message Date
Chris Lattner
3ae2dd2ba5 add newlines at the end of files. 
llvm-svn: 100705
 2010-04-07 22:53:17 +00:00
Mon P Wang
c576ee9040 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: 100304
 2010-04-04 03:10:48 +00:00
Mon P Wang
999c1b927b Revert r100191 since it breaks objc in clang 
llvm-svn: 100199
 2010-04-02 18:43:02 +00:00
Mon P Wang
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
Bob Wilson
6f7fd28824 Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots. 
llvm-svn: 99948
 2010-03-30 22:27:04 +00:00
Mon P Wang
7460571381 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)
A update of langref will occur in a subsequent checkin.

llvm-svn: 99928
 2010-03-30 20:55:56 +00:00
Dan Gohman
fb4193625a Delete useless trailing semicolons. 
llvm-svn: 92740
 2010-01-05 17:55:26 +00:00
Chris Lattner
850a3cd905 gvn is optimizing this better now. 
llvm-svn: 90696
 2009-12-06 04:16:05 +00:00
Chris Lattner
5fe97e7aca @test9 is a testcase for r89958. Before 89958, we misanalyzed the 
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
Chris Lattner
1bf7ff704a 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.

llvm-svn: 89959
 2009-11-26 18:53:33 +00:00
Chris Lattner
631c5b2cb9 teach GetLinearExpression to be a bit more aggressive. 
llvm-svn: 89955
 2009-11-26 17:00:01 +00:00
Chris Lattner
29bc8a91d3 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

llvm-svn: 89952
 2009-11-26 16:26:43 +00:00
Chris Lattner
12dacdd359 teach basicaa that A[i] != A[i+1]. 
llvm-svn: 89951
 2009-11-26 16:18:10 +00:00
Chris Lattner
453751031a rename test 
llvm-svn: 89950
 2009-11-26 16:08:41 +00:00
Chris Lattner
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. 
llvm-svn: 89922
 2009-11-26 02:17:34 +00:00
Chris Lattner
0d23076adf add a new random feature test 
llvm-svn: 89921
 2009-11-26 02:16:28 +00:00
Chris Lattner
db1e9f1290 remove a silly condition that doesn't make a lot of sense anymore. 
llvm-svn: 89601
 2009-11-22 16:15:59 +00:00
Kenneth Uildriks
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 
llvm-svn: 85900
 2009-11-03 15:29:06 +00:00
Dan Gohman
3b7ba5f35b Teach BasicAA how to analyze Select instructions, and make it more 
aggressive on PHI instructions.

llvm-svn: 85158
 2009-10-26 21:55:43 +00:00
Chris Lattner
1353518b6c fix test 
llvm-svn: 84405
 2009-10-18 05:03:00 +00:00
Chris Lattner
d2b3a4f7b8 tighten up test3, add test3a for the converse 
transform, which isn't happening yet.

llvm-svn: 84402
 2009-10-18 04:55:26 +00:00
Chris Lattner
457ecd5dab tighten test2, add a test that it doesn't get transformed in the invalid edge case. 
llvm-svn: 84401
 2009-10-18 04:50:18 +00:00
Nick Lewycky
ecb832fd93 Merge tests into modref.ll. Also add a test for r84174 at Chris' behest! 
llvm-svn: 84400
 2009-10-18 04:41:36 +00:00
Nick Lewycky
91ea404e98 Add a couple new testcases. 
llvm-svn: 84385
 2009-10-18 00:42:07 +00:00
Chris Lattner
ec411e9199 replace a useless test with a useful one 
llvm-svn: 84383
 2009-10-17 23:59:51 +00:00
Nick Lewycky
f01ba005a7 Make use of the result of the loads even though that means adding -instcombine. 
llvm-svn: 84125
 2009-10-14 19:02:13 +00:00
Evan Cheng
c1eed9d120 Another BasicAA fix. If a value does not alias a GEP's base pointer, then it 
cannot alias the GEP. GEP pointer alias rule states this clearly:
A pointer value formed from a getelementptr instruction is associated with the
addresses associated with the first operand of the getelementptr.

llvm-svn: 84079
 2009-10-14 06:41:49 +00:00
Evan Cheng
c745bf2d87 Replace test with a simpler hand crafted one. 
llvm-svn: 84069
 2009-10-14 01:45:10 +00:00
Evan Cheng
c10e88db22 Teach basic AA about PHI nodes. If all operands of a phi NoAlias another value than it's safe to declare the PHI NoAlias the value. Ditto for MustAlias. 
llvm-svn: 84038
 2009-10-13 22:02:20 +00:00
Chris Lattner
faa0320f27 don't use dead loads as tests. 
llvm-svn: 83985
 2009-10-13 17:39:29 +00:00
Nick Lewycky
e2782c7614 Teach BasicAA a little something about the atomic intrinsics: they can only 
modify through the pointer they're given.

llvm-svn: 83959
 2009-10-13 07:48:38 +00:00
Dan Gohman
0f3ef7be50 Eliminate more redundant llvm-as calls. 
llvm-svn: 81540
 2009-09-11 18:17:12 +00:00
Dan Gohman
1880092722 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.

llvm-svn: 81537
 2009-09-11 18:01:28 +00:00
Dan Gohman
c8054d90fb Eliminate more uses of llvm-as and llvm-dis. 
llvm-svn: 81293
 2009-09-09 00:09:15 +00:00
Dan Gohman
4f2527cd6d Convert a few more opt | llvm-dis to opt -S. 
llvm-svn: 81261
 2009-09-08 22:41:33 +00:00
Dan Gohman
72a13d2476 Use opt -S instead of piping bitcode output through llvm-dis. 
llvm-svn: 81257
 2009-09-08 22:34:10 +00:00
Dan Gohman
9737a63ed8 Change these tests to feed the assembly files to opt directly, instead 
of using llvm-as, now that opt supports this.

llvm-svn: 81226
 2009-09-08 16:50:01 +00:00
Chris Lattner
2d3e0a35bd rename test so that name reflects what it is testing for. 
llvm-svn: 80519
 2009-08-30 21:36:39 +00:00
Chris Lattner
c7d5796af8 convert to filecheck format. 
llvm-svn: 80518
 2009-08-30 21:36:06 +00:00
Dan Gohman
776e4c8d35 Teach BasicAliasAnalysis to understand constant gep indices that fall 
beyond their associated static array type.

I believe that this fixes a legitimate bug, because BasicAliasAnalysis
already has code to check for this condition that works for non-constant
indices, however it was missing the case of constant indices. With this
change, it checks for both.

This fixes PR4267, and miscompiles of SPEC 188.ammp and 464.h264.href.

llvm-svn: 72451
 2009-05-27 01:48:27 +00:00
Chris Lattner
d35d43dde8 change this to test for an alias result more directly. 
llvm-svn: 67046
 2009-03-16 18:28:27 +00:00
Nick Lewycky
8e0f9ac051 Add a replacement for 2009-02-12-GEPNoalias.ll that works without -debug. 
llvm-svn: 67011
 2009-03-14 19:40:09 +00:00
Chris Lattner
a18c768e6d remove a buggy test, it is not ok to use -debug in RUN line. 
llvm-svn: 66918
 2009-03-13 18:19:34 +00:00
Nick Lewycky
c60bd012bc BasicAA was making the assumption that a local allocation which hadn't escaped 
couldn't ever be the return of call instruction. However, it's quite possible
that said local allocation is itself the return of a function call. That's
what malloc and calloc are for, actually.

llvm-svn: 64442
 2009-02-13 07:06:27 +00:00
Owen Anderson
1caf7fef8e Finish making AliasAnalysis aware of the fact that most atomic intrinsics only dereference their arguments, and enhance 
BasicAA to make use of this fact when computing ModRef info.

llvm-svn: 63718
 2009-02-04 05:16:46 +00:00
Nick Lewycky
2abb108f1b Resubmit support for the 'nocapture' attribute. 
The problematic part of this patch is that we were out of attribute bits,
requiring some fancy bit hacking to make it fit (by shrinking alignment)
without breaking existing users or the file format.

This change will require users to rebuild llvm-gcc to match llvm.

llvm-svn: 61239
 2008-12-19 06:39:12 +00:00
Bill Wendling
e38c7400c9 Remove empty test. 
llvm-svn: 61095
 2008-12-16 19:07:17 +00:00
Bill Wendling
a397baea88 Temporarily revert r61019, r61030, and r61040. These were breaking LLVM Release 
builds.

llvm-svn: 61094
 2008-12-16 19:06:48 +00:00
Chris Lattner
e3401db1f3 Teach basicaa to use the nocapture attribute when possible. When the 
intrinsics are properly marked nocapture, the fixme should be addressed.

llvm-svn: 61040
 2008-12-15 18:59:22 +00:00
Chris Lattner
2e84a548d6 Allow basicaa to walk through geps with identical indices in 
parallel, allowing it to decide that P/Q must alias if A/B
must alias in things like:
 P = gep A, 0, i, 1
 Q = gep B, 0, i, 1

This allows GVN to delete 62 more instructions out of 403.gcc.

llvm-svn: 60820
 2008-12-10 01:04:47 +00:00