dereferenceable.ll
4.72 KB
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; RUN: opt -basicaa -print-all-alias-modref-info -aa-eval -analyze < %s 2>&1 | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
@G = global i32 0, align 4
define i64 @global_and_deref_arg_1(i64* dereferenceable(8) %arg) {
; CHECK: Function: global_and_deref_arg_1: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i32* @G, i64* %arg
bb:
store i64 1, i64* %arg, align 8
store i32 0, i32* @G, align 4
%tmp = load i64, i64* %arg, align 8
ret i64 %tmp
}
define i32 @global_and_deref_arg_2(i32* dereferenceable(8) %arg) {
; CHECK: Function: global_and_deref_arg_2: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i32* %arg, i32* @G
bb:
store i32 1, i32* %arg, align 8
store i32 0, i32* @G, align 4
%tmp = load i32, i32* %arg, align 8
ret i32 %tmp
}
define i32 @byval_and_deref_arg_1(i32* byval %obj, i64* dereferenceable(8) %arg) {
; CHECK: Function: byval_and_deref_arg_1: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i32* %obj, i64* %arg
bb:
store i32 1, i32* %obj, align 4
store i64 0, i64* %arg, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}
define i32 @byval_and_deref_arg_2(i32* byval %obj, i32* dereferenceable(8) %arg) {
; CHECK: Function: byval_and_deref_arg_2: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i32* %arg, i32* %obj
bb:
store i32 1, i32* %obj, align 4
store i32 0, i32* %arg, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}
declare dereferenceable(8) i32* @get_i32_deref8()
declare dereferenceable(8) i64* @get_i64_deref8()
declare void @unknown(i32*)
define i32 @local_and_deref_ret_1() {
; CHECK: Function: local_and_deref_ret_1: 2 pointers, 2 call sites
; CHECK-NEXT: NoAlias: i32* %obj, i64* %ret
bb:
%obj = alloca i32
call void @unknown(i32* %obj)
%ret = call dereferenceable(8) i64* @get_i64_deref8()
store i32 1, i32* %obj, align 4
store i64 0, i64* %ret, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}
define i32 @local_and_deref_ret_2() {
; CHECK: Function: local_and_deref_ret_2: 2 pointers, 2 call sites
; CHECK-NEXT: NoAlias: i32* %obj, i32* %ret
bb:
%obj = alloca i32
call void @unknown(i32* %obj)
%ret = call dereferenceable(8) i32* @get_i32_deref8()
store i32 1, i32* %obj, align 4
store i32 0, i32* %ret, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}
; Baseline tests, same as above but with 2 instead of 8 dereferenceable bytes.
define i64 @global_and_deref_arg_non_deref_1(i64* dereferenceable(2) %arg) {
; CHECK: Function: global_and_deref_arg_non_deref_1: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i32* @G, i64* %arg
bb:
store i64 1, i64* %arg, align 8
store i32 0, i32* @G, align 4
%tmp = load i64, i64* %arg, align 8
ret i64 %tmp
}
define i32 @global_and_deref_arg_non_deref_2(i32* dereferenceable(2) %arg) {
; CHECK: Function: global_and_deref_arg_non_deref_2: 2 pointers, 0 call sites
; Different result than above (see @global_and_deref_arg_2).
; CHECK-NEXT: MayAlias: i32* %arg, i32* @G
bb:
store i32 1, i32* %arg, align 8
store i32 0, i32* @G, align 4
%tmp = load i32, i32* %arg, align 8
ret i32 %tmp
}
define i32 @byval_and_deref_arg_non_deref_1(i32* byval %obj, i64* dereferenceable(2) %arg) {
; CHECK: Function: byval_and_deref_arg_non_deref_1: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i32* %obj, i64* %arg
bb:
store i32 1, i32* %obj, align 4
store i64 0, i64* %arg, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}
define i32 @byval_and_deref_arg_non_deref_2(i32* byval %obj, i32* dereferenceable(2) %arg) {
; CHECK: Function: byval_and_deref_arg_non_deref_2: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i32* %arg, i32* %obj
bb:
store i32 1, i32* %obj, align 4
store i32 0, i32* %arg, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}
declare dereferenceable(2) i32* @get_i32_deref2()
declare dereferenceable(2) i64* @get_i64_deref2()
define i32 @local_and_deref_ret_non_deref_1() {
; CHECK: Function: local_and_deref_ret_non_deref_1: 2 pointers, 2 call sites
; CHECK-NEXT: NoAlias: i32* %obj, i64* %ret
bb:
%obj = alloca i32
call void @unknown(i32* %obj)
%ret = call dereferenceable(2) i64* @get_i64_deref2()
store i32 1, i32* %obj, align 4
store i64 0, i64* %ret, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}
define i32 @local_and_deref_ret_non_deref_2() {
; CHECK: Function: local_and_deref_ret_non_deref_2: 2 pointers, 2 call sites
; Different result than above (see @local_and_deref_ret_2).
; CHECK-NEXT: MayAlias: i32* %obj, i32* %ret
bb:
%obj = alloca i32
call void @unknown(i32* %obj)
%ret = call dereferenceable(2) i32* @get_i32_deref2()
store i32 1, i32* %obj, align 4
store i32 0, i32* %ret, align 8
%tmp = load i32, i32* %obj, align 4
ret i32 %tmp
}