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37 lines
1.4 KiB
LLVM
37 lines
1.4 KiB
LLVM
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; This testcase ensures that CFL AA answers queries soundly when callee tries
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; to return the dereference of one of its parameters
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; RUN: opt < %s -disable-basicaa -cfl-anders-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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define i32* @return_deref_arg_callee(i32** %arg1) {
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%deref = load i32*, i32** %arg1
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ret i32* %deref
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}
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; CHECK-LABEL: Function: test_return_deref_arg
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; CHECK: NoAlias: i32* %a, i32* %b
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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: MayAlias: i32* %a, i32* %lp
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; CHECK: NoAlias: i32* %b, i32* %lp
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; CHECK: NoAlias: i32* %lp, i32** %p
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; CHECK: MayAlias: i32* %c, i32* %lp
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; Temporarily disable modref checks
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; NoModRef: Ptr: i32* %a <-> %c = call i32* @return_deref_arg_callee(i32** %p)
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; NoModRef: Ptr: i32* %b <-> %c = call i32* @return_deref_arg_callee(i32** %p)
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; Just Ref: Ptr: i32** %p <-> %c = call i32* @return_deref_arg_callee(i32** %p)
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; NoModRef: Ptr: i32* %c <-> %c = call i32* @return_deref_arg_callee(i32** %p)
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; NoModRef: Ptr: i32* %lp <-> %c = call i32* @return_deref_arg_callee(i32** %p)
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define void @test_return_deref_arg() {
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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 8
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store i32* %a, i32** %p
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%c = call i32* @return_deref_arg_callee(i32** %p)
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%lp = load i32*, i32** %p
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ret void
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}
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