1 ; RUN: opt -S -early-cse < %s | FileCheck %s
2 ; RUN: opt -S -gvn < %s | FileCheck %s
3 ; RUN: opt -S -newgvn < %s | FileCheck %s
4 ; RUN: opt -S -O3 < %s | FileCheck %s
6 ; These tests checks if passes with CSE functionality can do CSE on
7 ; launder.invariant.group, that is prohibited if there is a memory clobber
8 ; between barriers call.
10 ; CHECK-LABEL: define i8 @optimizable()
11 define i8 @optimizable() {
14 store i8 42, i8* %ptr, !invariant.group !0
15 ; CHECK: call i8* @llvm.launder.invariant.group.p0i8
16 %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
17 ; FIXME: This one could be CSE
18 ; CHECK: call i8* @llvm.launder.invariant.group
19 %ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
20 ; CHECK: call void @clobber(i8* {{.*}}%ptr)
21 call void @clobber(i8* %ptr)
23 ; CHECK: call void @use(i8* {{.*}}%ptr2)
24 call void @use(i8* %ptr2)
25 ; CHECK: call void @use(i8* {{.*}}%ptr3)
26 call void @use(i8* %ptr3)
27 ; CHECK: load i8, i8* %ptr3, {{.*}}!invariant.group
28 %v = load i8, i8* %ptr3, !invariant.group !0
33 ; CHECK-LABEL: define i8 @unoptimizable()
34 define i8 @unoptimizable() {
37 store i8 42, i8* %ptr, !invariant.group !0
38 ; CHECK: call i8* @llvm.launder.invariant.group.p0i8
39 %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
40 call void @clobber(i8* %ptr)
41 ; CHECK: call i8* @llvm.launder.invariant.group.p0i8
42 %ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
43 ; CHECK: call void @clobber(i8* {{.*}}%ptr)
44 call void @clobber(i8* %ptr)
45 ; CHECK: call void @use(i8* {{.*}}%ptr2)
46 call void @use(i8* %ptr2)
47 ; CHECK: call void @use(i8* {{.*}}%ptr3)
48 call void @use(i8* %ptr3)
49 ; CHECK: load i8, i8* %ptr3, {{.*}}!invariant.group
50 %v = load i8, i8* %ptr3, !invariant.group !0
55 ; CHECK-LABEL: define i8 @unoptimizable2()
56 define i8 @unoptimizable2() {
58 store i8 42, i8* %ptr, !invariant.group !0
59 ; CHECK: call i8* @llvm.launder.invariant.group
60 %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
62 ; CHECK: call i8* @llvm.launder.invariant.group
63 %ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr)
64 ; CHECK: call void @clobber(i8* {{.*}}%ptr)
65 call void @clobber(i8* %ptr)
66 ; CHECK: call void @use(i8* {{.*}}%ptr2)
67 call void @use(i8* %ptr2)
68 ; CHECK: call void @use(i8* {{.*}}%ptr3)
69 call void @use(i8* %ptr3)
70 ; CHECK: load i8, i8* %ptr3, {{.*}}!invariant.group
71 %v = load i8, i8* %ptr3, !invariant.group !0
75 ; This test check if optimizer is not proving equality based on mustalias
76 ; CHECK-LABEL: define void @dontProveEquality(i8* %a)
77 define void @dontProveEquality(i8* %a) {
78 %b = call i8* @llvm.launder.invariant.group.p0i8(i8* %a)
79 %r = icmp eq i8* %b, %a
80 ; CHECK: call void @useBool(i1 %r)
81 call void @useBool(i1 %r)
83 %b2 = call i8* @llvm.strip.invariant.group.p0i8(i8* %a)
84 %r2 = icmp eq i8* %b2, %a
85 ; CHECK: call void @useBool(i1 %r2)
86 call void @useBool(i1 %r2)
91 declare void @use(i8* readonly)
92 declare void @useBool(i1)
94 declare void @clobber(i8*)
95 ; CHECK: Function Attrs: inaccessiblememonly nounwind speculatable{{$}}
96 ; CHECK-NEXT: declare i8* @llvm.launder.invariant.group.p0i8(i8*)
97 declare i8* @llvm.launder.invariant.group.p0i8(i8*)
99 ; CHECK: Function Attrs: nounwind readnone speculatable{{$}}
100 ; CHECK-NEXT: declare i8* @llvm.strip.invariant.group.p0i8(i8*)
101 declare i8* @llvm.strip.invariant.group.p0i8(i8*)