95 lines
3.0 KiB
LLVM
95 lines
3.0 KiB
LLVM
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; This testcase ensures that CFL AA handles escaped values no more conservative than it should
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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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; CHECK-LABEL: Function: test_local
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; CHECK: NoAlias: i32* %a, i32* %b
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; CHECK: MayAlias: i32* %a, i32* %aAlias
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; CHECK: NoAlias: i32* %aAlias, i32* %b
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define void @test_local() {
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%a = alloca i32, align 4
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%b = alloca i32, align 4
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%aint = ptrtoint i32* %a to i64
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%aAlias = inttoptr i64 %aint to i32*
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ret void
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}
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; CHECK-LABEL: Function: test_global_param
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; CHECK: NoAlias: i32* %a, i32** %x
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; CHECK: MayAlias: i32* %a, i32* %xload
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; CHECK: MayAlias: i32* %a, i32* %gload
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; CHECK: MayAlias: i32* %gload, i32* %xload
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; CHECK: MayAlias: i32** %x, i32** @ext_global
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; CHECK: NoAlias: i32* %a, i32** @ext_global
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@ext_global = external global i32*
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define void @test_global_param(i32** %x) {
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%a = alloca i32, align 4
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%aint = ptrtoint i32* %a to i64
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%xload = load i32*, i32** %x
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%gload = load i32*, i32** @ext_global
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ret void
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}
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declare void @external_func(i32**)
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; CHECK-LABEL: Function: test_external_call
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; CHECK: NoAlias: i32* %b, i32* %x
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; CHECK: NoAlias: i32* %b, i32** %a
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; CHECK: MayAlias: i32* %c, i32* %x
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; CHECK: MayAlias: i32* %c, i32** %a
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; CHECK: NoAlias: i32* %b, i32* %c
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define void @test_external_call(i32* %x) {
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%a = alloca i32*, align 8
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%b = alloca i32, align 4
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call void @external_func(i32** %a)
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%c = load i32*, i32** %a
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ret void
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}
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declare void @external_func_readonly(i32**) readonly
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; CHECK-LABEL: Function: test_external_call_func_readonly
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; CHECK: MayAlias: i32* %c, i32* %x
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; CHECK: NoAlias: i32* %c, i32** %a
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define void @test_external_call_func_readonly(i32* %x) {
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%a = alloca i32*, align 8
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%b = alloca i32, align 4
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store i32* %x, i32** %a, align 4
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call void @external_func_readonly(i32** %a)
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%c = load i32*, i32** %a
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ret void
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}
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; CHECK-LABEL: Function: test_external_call_callsite_readonly
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; CHECK: MayAlias: i32* %c, i32* %x
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; CHECK: NoAlias: i32* %c, i32** %a
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define void @test_external_call_callsite_readonly(i32* %x) {
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%a = alloca i32*, align 8
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%b = alloca i32, align 4
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store i32* %x, i32** %a, align 4
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call void @external_func(i32** %a) readonly
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%c = load i32*, i32** %a
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ret void
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}
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declare i32* @external_func_normal_return(i32*)
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; CHECK-LABEL: Function: test_external_call_normal_return
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; CHECK: MayAlias: i32* %c, i32* %x
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; CHECK: MayAlias: i32* %a, i32* %c
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define void @test_external_call_normal_return(i32* %x) {
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%a = alloca i32, align 8
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%b = alloca i32, align 4
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%c = call i32* @external_func_normal_return(i32* %a)
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ret void
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}
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declare noalias i32* @external_func_noalias_return(i32*)
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; CHECK-LABEL: Function: test_external_call_noalias_return
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; CHECK: NoAlias: i32* %c, i32* %x
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; CHECK: NoAlias: i32* %a, i32* %c
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define void @test_external_call_noalias_return(i32* %x) {
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%a = alloca i32, align 8
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%b = alloca i32, align 4
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%c = call i32* @external_func_noalias_return(i32* %a)
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ret void
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}
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