56 lines
1.3 KiB
LLVM
56 lines
1.3 KiB
LLVM
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; RUN: opt < %s -basic-aa -dse -S | FileCheck %s
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declare noalias i8* @malloc(i64) "malloc-like"
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declare void @foo()
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declare void @bar(i8*)
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define void @test() {
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%obj = call i8* @malloc(i64 8)
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store i8 0, i8* %obj
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; don't remove store. %obj should be treated like it will be read by the @foo.
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; CHECK: store i8 0, i8* %obj
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call void @foo() ["deopt" (i8* %obj)]
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ret void
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}
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define void @test1() {
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%obj = call i8* @malloc(i64 8)
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store i8 0, i8* %obj
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; CHECK: store i8 0, i8* %obj
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call void @bar(i8* nocapture %obj)
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ret void
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}
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define void @test2() {
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%obj = call i8* @malloc(i64 8)
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store i8 0, i8* %obj
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; CHECK-NOT: store i8 0, i8* %obj
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call void @foo()
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ret void
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}
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define void @test3() {
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; CHECK-LABEL: @test3(
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%s = alloca i64
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; Verify that this first store is not considered killed by the second one
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; since it could be observed from the deopt continuation.
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; CHECK: store i64 1, i64* %s
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store i64 1, i64* %s
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call void @foo() [ "deopt"(i64* %s) ]
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store i64 0, i64* %s
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ret void
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}
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declare noalias i8* @calloc(i64, i64)
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define void @test4() {
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; CHECK-LABEL: @test4
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%local_obj = call i8* @calloc(i64 1, i64 4)
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call void @foo() ["deopt" (i8* %local_obj)]
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store i8 0, i8* %local_obj, align 4
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; CHECK-NOT: store i8 0, i8* %local_obj, align 4
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call void @bar(i8* nocapture %local_obj)
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ret void
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}
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