blob: a11475fdb57cc46bdd6662169878418f5b345a54 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
; RUN: opt -S -inline < %s | FileCheck %s
; RUN: opt -S -O3 < %s | FileCheck %s
; This test checks if value returned from the launder is considered aliasing
; with its argument. Due to bug caused by handling launder in capture tracking
; sometimes it would be considered noalias.
%struct.A = type <{ i32 (...)**, i32, [4 x i8] }>
; CHECK: define i32 @bar(%struct.A* noalias
define i32 @bar(%struct.A* noalias) {
; CHECK-NOT: noalias
%2 = bitcast %struct.A* %0 to i8*
%3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %2)
%4 = getelementptr inbounds i8, i8* %3, i64 8
%5 = bitcast i8* %4 to i32*
store i32 42, i32* %5, align 8
%6 = getelementptr inbounds %struct.A, %struct.A* %0, i64 0, i32 1
%7 = load i32, i32* %6, align 8
ret i32 %7
}
; CHECK-LABEL: define i32 @foo(%struct.A* noalias
define i32 @foo(%struct.A* noalias) {
; CHECK-NOT: call i32 @bar(
; CHECK-NOT: noalias
%2 = tail call i32 @bar(%struct.A* %0)
ret i32 %2
}
declare i8* @llvm.launder.invariant.group.p0i8(i8*)
|
