38 lines
1.2 KiB
LLVM
38 lines
1.2 KiB
LLVM
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; This testcase ensures that CFL AA answers queries soundly when callee tries
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; to return an unknown pointer
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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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@g = external global i32
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define i32* @return_unknown_callee(i32* %arg1, i32* %arg2) {
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ret i32* @g
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}
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; CHECK-LABEL: Function: test_return_unknown
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; CHECK: NoAlias: i32* %a, i32* %b
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; CHECK: MayAlias: i32* %c, i32* %x
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; CHECK: NoAlias: i32* %a, i32* %c
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; CHECK: NoAlias: i32* %b, i32* %c
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define void @test_return_unknown(i32* %x) {
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%a = alloca i32, align 4
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%b = alloca i32, align 4
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%c = call i32* @return_unknown_callee(i32* %a, i32* %b)
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ret void
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}
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@g2 = external global i32*
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define i32** @return_unknown_callee2() {
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ret i32** @g2
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}
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; CHECK-LABEL: Function: test_return_unknown2
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; CHECK: MayAlias: i32* %x, i32** %a
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; CHECK: MayAlias: i32* %b, i32* %x
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; CHECK: MayAlias: i32* %b, i32** %a
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define void @test_return_unknown2(i32* %x) {
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%a = call i32** @return_unknown_callee2()
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%b = load i32*, i32** %a
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ret void
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}
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