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2010-09-02remove some noise from tests.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112889 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-30Fix constant-over-index.ll test on windows.Michael J. Spencer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112483 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18refix PR1143 by making basicaa analyze zexts of indices aggresively,Chris Lattner
which I broke with a recent patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111452 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18fix a buggy testChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111354 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18fix PR7589: In brief:Chris Lattner
gep P, (zext x) != gep P, (sext x) DecomposeGEPExpression was getting this wrong, confusing basicaa. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111352 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-18filecheckize and detrivialize.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111350 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Implement a proper getModRefInfo for va_arg.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110458 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Implement AccessesArguments checking in the two-callsite formDan Gohman
of BasicAA::getModRefInfo. This allows BasicAA to say that two memset calls to non-aliasing memory locations don't interfere. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110393 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Fix memdep's code for reasoning about dependences between two calls. A RefDan Gohman
response from getModRefInfo is not useful here. Instead, check for identical calls only in the NoModRef case. Reapply r110270, and strengthen it to compensate for the memdep changes. When both calls are readonly, there is no dependence between them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110382 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Revert r110270 for now. It appears to uncover a memdep bug.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110293 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04The trouble with testing for "ModRef" and "NoModRef" is thatDan Gohman
one is a suffix of the other, and FileCheck accepts superstrings. Adjust the output to avoid this problem. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110280 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04The two-callsite form of AliasAnalysis::getModRefInfo is documentedDan Gohman
to return Ref if the left callsite only reads memory read or written by the right callsite; fix BasicAliasAnalysis to implement this. Add AliasAnalysisEvaluator support for testing the two-callsite form of getModRefInfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110270 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-07Remove interprocedural-basic-aa and associated code. The AliasAnalysisDan Gohman
interface needs implementations to be consistent, so any code which wants to support different semantics must use a different interface. It's not currently worthwhile to add a new interface for this new concept. Document that AliasAnalysis doesn't support cross-function queries. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107776 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-01Remove context sensitivity concerns from interprocedural-basic-aa, andDan Gohman
make it more aggressive in cases where both pointers are known to live in the same function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107420 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-29Add a few more interesting testcases.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107177 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-29Add an Intraprocedural form of BasicAliasAnalysis, which aims toDan Gohman
properly handles instructions and arguments defined in different functions, or across recursive function iterations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107109 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-28Fix Value::stripPointerCasts and BasicAA to avoid trouble onDan Gohman
code in unreachable blocks, which have have use-def cycles. This fixes PR7514. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107071 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-08Pointers to zero-sized objects don't point to overlapping objects.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100789 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-07add newlines at the end of files.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100705 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-04Reapply address space patch after fixing an issue in MemCopyOptimizer.Mon P Wang
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) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100304 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-02Revert r100191 since it breaks objc in clang Mon P Wang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100199 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-02Reapply address space patch after fixing an issue in MemCopyOptimizer.Mon P Wang
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) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100191 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots.Bob Wilson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99948 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30Added support for address spaces and added a isVolatile field to memcpy, ↵Mon P Wang
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99928 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-05Delete useless trailing semicolons.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92740 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-06gvn is optimizing this better now.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90696 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26@test9 is a testcase for r89958. Before 89958, we misanalyzed theChris Lattner
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89960 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26Implement PR1143 (at -m64) by making basicaa look through extensions. WeChris Lattner
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
2009-11-26teach GetLinearExpression to be a bit more aggressive.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89955 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26Teach basicaa that x|c == x+c when the c bits of x are clear. ThisChris Lattner
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
2009-11-26teach basicaa that A[i] != A[i+1].Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89951 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26rename testChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89950 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-26Change the other half of aliasGEP (which handles GEP differencing) to use ↵Chris Lattner
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
2009-11-26add a new random feature testChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89921 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-22remove a silly condition that doesn't make a lot of sense anymore.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89601 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03Make opt default to not adding a target data string and update tests that ↵Kenneth Uildriks
depend on target data to supply it within the test git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85900 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26Teach BasicAA how to analyze Select instructions, and make it moreDan Gohman
aggressive on PHI instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85158 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18fix testChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84405 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18tighten up test3, add test3a for the converse Chris Lattner
transform, which isn't happening yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84402 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18tighten test2, add a test that it doesn't get transformed in the invalid ↵Chris Lattner
edge case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84401 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18Merge tests into modref.ll. Also add a test for r84174 at Chris' behest!Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84400 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18Add a couple new testcases.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84385 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-17replace a useless test with a useful oneChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84383 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-14Make use of the result of the loads even though that means adding -instcombine.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84125 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-14Another BasicAA fix. If a value does not alias a GEP's base pointer, then itEvan Cheng
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84079 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-14Replace test with a simpler hand crafted one.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84069 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Teach basic AA about PHI nodes. If all operands of a phi NoAlias another ↵Evan Cheng
value than it's safe to declare the PHI NoAlias the value. Ditto for MustAlias. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84038 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13don't use dead loads as tests.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83985 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Teach BasicAA a little something about the atomic intrinsics: they can onlyNick Lewycky
modify through the pointer they're given. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83959 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11Eliminate more redundant llvm-as calls.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81540 91177308-0d34-0410-b5e6-96231b3b80d8
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