33 lines
1.1 KiB
LLVM
33 lines
1.1 KiB
LLVM
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; This testcase ensures that CFL AA answers queries soundly when callee tries
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; to escape the memory pointed to by its parameters
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; RUN: opt < %s -disable-basic-aa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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declare void @opaque(i32*)
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define void @escape_arg_deref(i32** %arg) {
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%arg_deref = load i32*, i32** %arg
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call void @opaque(i32* %arg_deref)
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ret void
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}
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; CHECK-LABEL: Function: test_arg_deref_escape
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; CHECK: NoAlias: i32* %a, i32** %x
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; CHECK: NoAlias: i32* %b, i32** %x
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; CHECK: NoAlias: i32* %a, i32* %b
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; CHECK: NoAlias: i32** %p, i32** %x
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; CHECK: NoAlias: i32* %a, i32** %p
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; CHECK: NoAlias: i32* %b, i32** %p
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; CHECK: MayAlias: i32* %a, i32* %c
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; CHECK: NoAlias: i32* %b, i32* %c
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; CHECK: NoAlias: i32* %c, i32** %p
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define void @test_arg_deref_escape(i32** %x) {
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%a = alloca i32, align 4
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%b = alloca i32, align 4
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%p = alloca i32*, align 4
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store i32* %a, i32** %p
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call void @escape_arg_deref(i32** %p)
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%c = load i32*, i32** %x
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ret void
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}
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