850062cf49
CaptureTracking considers insertions into aggregates and vectors as captures. As such, extractions from aggregates and vectors are escape sources. A non-escaping identified local cannot alias with the result of an extractvalue/extractelement. Fixes https://github.com/llvm/llvm-project/issues/126670.
48 lines
1.2 KiB
LLVM
48 lines
1.2 KiB
LLVM
; RUN: opt -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 < %s | FileCheck %s
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declare { ptr, i1 } @get_struct()
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declare <2 x ptr> @get_vec()
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declare void @escape(ptr)
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; CHECK: NoAlias: i32* %a, i32* %extract
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define i32 @test_extractvalue() {
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%a = alloca i32
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%call = call { ptr, i1 } @get_struct()
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%extract = extractvalue { ptr, i1 } %call, 0
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store i32 0, ptr %extract
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%v = load i32, ptr %a
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ret i32 %v
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}
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; CHECK: NoAlias: i32* %a, i32* %extract
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define i32 @test_extractelement() {
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%a = alloca i32
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%call = call <2 x ptr> @get_vec()
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%extract = extractelement <2 x ptr> %call, i32 0
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store i32 0, ptr %extract
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%v = load i32, ptr %a
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ret i32 %v
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}
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; CHECK: MayAlias: i32* %a, i32* %extract
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define i32 @test_extractvalue_escape() {
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%a = alloca i32
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call void @escape(ptr %a)
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%call = call { ptr, i1 } @get_struct()
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%extract = extractvalue { ptr, i1 } %call, 0
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store i32 0, ptr %extract
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%v = load i32, ptr %a
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ret i32 %v
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}
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; CHECK: MayAlias: i32* %a, i32* %extract
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define i32 @test_extractelement_escape() {
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%a = alloca i32
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call void @escape(ptr %a)
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%call = call <2 x ptr> @get_vec()
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%extract = extractelement <2 x ptr> %call, i32 0
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store i32 0, ptr %extract
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%v = load i32, ptr %a
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ret i32 %v
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}
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