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c5f9051b0c
LoadInst isn't enough; we need to include intrinsics that perform loads too. All side-effecting intrinsics and such are already covered by the isSafe check, so we just need to care about things that read from memory. D41960, originally from D33179. llvm-svn: 322311
27 lines
808 B
LLVM
27 lines
808 B
LLVM
; RUN: opt < %s -basicaa -sink -S | FileCheck %s
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declare void @foo(i64 *)
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declare i8* @llvm.load.relative.i32(i8* %ptr, i32 %offset) argmemonly nounwind readonly
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define i64 @sinkload(i1 %cmp, i8* %ptr, i32 %off) {
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; CHECK-LABEL: @sinkload
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top:
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%a = alloca i64
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; CHECK: call void @foo(i64* %a)
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; CHECK-NEXT: %x = load i64, i64* %a
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; CHECK-NEXT: %y = call i8* @llvm.load.relative.i32(i8* %ptr, i32 %off)
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call void @foo(i64* %a)
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%x = load i64, i64* %a
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%y = call i8* @llvm.load.relative.i32(i8* %ptr, i32 %off)
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br i1 %cmp, label %A, label %B
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A:
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store i64 0, i64 *%a
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store i8 0, i8 *%ptr
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br label %B
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B:
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; CHECK-NOT: load i64, i64 *%a
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; CHECK-NOT: call i8* @llvm.load.relative(i8* %ptr, i32 off)
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%y2 = ptrtoint i8* %y to i64
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%retval = add i64 %y2, %x
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ret i64 %retval
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}
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