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another (more) aggressive attempt to bring llvm-gcc-i386-linux-selfhost 

back to life.

llvm-svn: 123146
This commit is contained in:
Chris Lattner 2011-01-10 00:47:34 +00:00
parent eef1455020
commit 4662bd4b13
2 changed files with 8 additions and 4 deletions
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2
llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
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@ -391,6 +391,8 @@ Instruction *MemCpyOpt::tryMergingIntoMemset(Instruction *StartInst,
Ranges.addStore(Offset, NextStore); Ranges.addStore(Offset, NextStore);
} else { } else {
break;
MemSetInst *MSI = cast<MemSetInst>(BI); MemSetInst *MSI = cast<MemSetInst>(BI);
if (MSI->isVolatile() || ByteVal != MSI->getValue() || if (MSI->isVolatile() || ByteVal != MSI->getValue() ||

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

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