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revert r123146 which disabled code that wasn't the root cause

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of the bootstrap miscompare issue.

llvm-svn: 123299
This commit is contained in:
Chris Lattner 2011-01-12 01:52:23 +00:00
parent c7a5a12af5
commit e288204194
2 changed files with 4 additions and 8 deletions
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2
lib/Transforms/Scalar/MemCpyOptimizer.cpp
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@ -391,8 +391,6 @@ Instruction *MemCpyOpt::tryMergingIntoMemset(Instruction *StartInst,
Ranges.addStore(Offset, NextStore);
} else {
break;
MemSetInst *MSI = cast<MemSetInst>(BI);
if (MSI->isVolatile() || ByteVal != MSI->getValue() ||

10
test/Transforms/MemCpyOpt/form-memset.ll
View File

@ -173,24 +173,22 @@ entry:
%0 = bitcast i32* %add.ptr to i8*
tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 11, i32 1, i1 false)
ret void
;; DISABLED
; CHECK: @test3
; HECK-NOT: store
; CHECK-NOT: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
; CHECK-NOT: store
; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
}
; store followed by memset, different offset scenario
define void @test4(i32* nocapture %P) nounwind ssp {
entry:
;; DISABLED
store i32 0, i32* %P, align 4
%add.ptr = getelementptr inbounds i32* %P, i64 1
%0 = bitcast i32* %add.ptr to i8*
tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 11, i32 1, i1 false)
ret void
; CHECK: @test4
; HECK-NOT: store
; CHECK-NOT: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
; CHECK-NOT: store
; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
}
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind