36 lines
1.2 KiB
LLVM
36 lines
1.2 KiB
LLVM
; This testcase ensures that CFL AA answers queries soundly when callee tries
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; to mutate the memory pointed to by its parameters
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; RUN: opt < %s -disable-basicaa -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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define void @store_arg_callee(i32** %arg1, i32* %arg2) {
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store i32* %arg2, i32** %arg1
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ret void
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}
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; CHECK-LABEL: Function: test_store_arg
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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* %lp
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; CHECK: MayAlias: i32* %b, i32* %lp
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; CHECK: MayAlias: i32* %b, i32* %lq
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; CHECK: MayAlias: i32* %lp, i32* %lq
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; We could've proven the following facts if the analysis were inclusion-based:
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; NoAlias: i32* %a, i32* %b
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; NoAlias: i32* %a, i32* %lq
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define void @test_store_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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%q = alloca i32*, align 8
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store i32* %a, i32** %p
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store i32* %b, i32** %q
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call void @store_arg_callee(i32** %p, i32* %b)
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%lp = load i32*, i32** %p
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%lq = load i32*, i32** %q
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ret void
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} |