attr-escape.ll
3.02 KB
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; This testcase ensures that CFL AA handles escaped values no more conservative than it should
; RUN: opt < %s -disable-basic-aa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
; CHECK-LABEL: Function: test_local
; CHECK: NoAlias: i32* %a, i32* %b
; CHECK: MayAlias: i32* %a, i32* %aAlias
; CHECK: NoAlias: i32* %aAlias, i32* %b
define void @test_local() {
%a = alloca i32, align 4
%b = alloca i32, align 4
%aint = ptrtoint i32* %a to i64
%aAlias = inttoptr i64 %aint to i32*
ret void
}
; CHECK-LABEL: Function: test_global_param
; CHECK: NoAlias: i32* %a, i32** %x
; CHECK: MayAlias: i32* %a, i32* %xload
; CHECK: MayAlias: i32* %a, i32* %gload
; CHECK: MayAlias: i32* %gload, i32* %xload
; CHECK: MayAlias: i32** %x, i32** @ext_global
; CHECK: NoAlias: i32* %a, i32** @ext_global
@ext_global = external global i32*
define void @test_global_param(i32** %x) {
%a = alloca i32, align 4
%aint = ptrtoint i32* %a to i64
%xload = load i32*, i32** %x
%gload = load i32*, i32** @ext_global
ret void
}
declare void @external_func(i32**)
; CHECK-LABEL: Function: test_external_call
; CHECK: NoAlias: i32* %b, i32* %x
; CHECK: NoAlias: i32* %b, i32** %a
; CHECK: MayAlias: i32* %c, i32* %x
; CHECK: MayAlias: i32* %c, i32** %a
; CHECK: NoAlias: i32* %b, i32* %c
define void @test_external_call(i32* %x) {
%a = alloca i32*, align 8
%b = alloca i32, align 4
call void @external_func(i32** %a)
%c = load i32*, i32** %a
ret void
}
declare void @external_func_readonly(i32**) readonly
; CHECK-LABEL: Function: test_external_call_func_readonly
; CHECK: MayAlias: i32* %c, i32* %x
; CHECK: NoAlias: i32* %c, i32** %a
define void @test_external_call_func_readonly(i32* %x) {
%a = alloca i32*, align 8
%b = alloca i32, align 4
store i32* %x, i32** %a, align 4
call void @external_func_readonly(i32** %a)
%c = load i32*, i32** %a
ret void
}
; CHECK-LABEL: Function: test_external_call_callsite_readonly
; CHECK: MayAlias: i32* %c, i32* %x
; CHECK: NoAlias: i32* %c, i32** %a
define void @test_external_call_callsite_readonly(i32* %x) {
%a = alloca i32*, align 8
%b = alloca i32, align 4
store i32* %x, i32** %a, align 4
call void @external_func(i32** %a) readonly
%c = load i32*, i32** %a
ret void
}
declare i32* @external_func_normal_return(i32*)
; CHECK-LABEL: Function: test_external_call_normal_return
; CHECK: MayAlias: i32* %c, i32* %x
; CHECK: MayAlias: i32* %a, i32* %c
define void @test_external_call_normal_return(i32* %x) {
%a = alloca i32, align 8
%b = alloca i32, align 4
%c = call i32* @external_func_normal_return(i32* %a)
ret void
}
declare noalias i32* @external_func_noalias_return(i32*)
; CHECK-LABEL: Function: test_external_call_noalias_return
; CHECK: NoAlias: i32* %c, i32* %x
; CHECK: NoAlias: i32* %a, i32* %c
define void @test_external_call_noalias_return(i32* %x) {
%a = alloca i32, align 8
%b = alloca i32, align 4
%c = call i32* @external_func_noalias_return(i32* %a)
ret void
}