xref: /aosp_15_r20/external/llvm/test/Transforms/FunctionAttrs/readattrs.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -functionattrs -S | FileCheck %s
2*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -aa-pipeline=basic-aa -passes='cgscc(function-attrs)' -S | FileCheck %s
3*9880d681SAndroid Build Coastguard Worker@x = global i32 0
4*9880d681SAndroid Build Coastguard Worker
5*9880d681SAndroid Build Coastguard Workerdeclare void @test1_1(i8* %x1_1, i8* readonly %y1_1, ...)
6*9880d681SAndroid Build Coastguard Worker
7*9880d681SAndroid Build Coastguard Worker; CHECK: define void @test1_2(i8* %x1_2, i8* readonly %y1_2, i8* %z1_2)
8*9880d681SAndroid Build Coastguard Workerdefine void @test1_2(i8* %x1_2, i8* %y1_2, i8* %z1_2) {
9*9880d681SAndroid Build Coastguard Worker  call void (i8*, i8*, ...) @test1_1(i8* %x1_2, i8* %y1_2, i8* %z1_2)
10*9880d681SAndroid Build Coastguard Worker  store i32 0, i32* @x
11*9880d681SAndroid Build Coastguard Worker  ret void
12*9880d681SAndroid Build Coastguard Worker}
13*9880d681SAndroid Build Coastguard Worker
14*9880d681SAndroid Build Coastguard Worker; CHECK: define i8* @test2(i8* readnone %p)
15*9880d681SAndroid Build Coastguard Workerdefine i8* @test2(i8* %p) {
16*9880d681SAndroid Build Coastguard Worker  store i32 0, i32* @x
17*9880d681SAndroid Build Coastguard Worker  ret i8* %p
18*9880d681SAndroid Build Coastguard Worker}
19*9880d681SAndroid Build Coastguard Worker
20*9880d681SAndroid Build Coastguard Worker; CHECK: define i1 @test3(i8* readnone %p, i8* readnone %q)
21*9880d681SAndroid Build Coastguard Workerdefine i1 @test3(i8* %p, i8* %q) {
22*9880d681SAndroid Build Coastguard Worker  %A = icmp ult i8* %p, %q
23*9880d681SAndroid Build Coastguard Worker  ret i1 %A
24*9880d681SAndroid Build Coastguard Worker}
25*9880d681SAndroid Build Coastguard Worker
26*9880d681SAndroid Build Coastguard Workerdeclare void @test4_1(i8* nocapture) readonly
27*9880d681SAndroid Build Coastguard Worker
28*9880d681SAndroid Build Coastguard Worker; CHECK: define void @test4_2(i8* nocapture readonly %p)
29*9880d681SAndroid Build Coastguard Workerdefine void @test4_2(i8* %p) {
30*9880d681SAndroid Build Coastguard Worker  call void @test4_1(i8* %p)
31*9880d681SAndroid Build Coastguard Worker  ret void
32*9880d681SAndroid Build Coastguard Worker}
33*9880d681SAndroid Build Coastguard Worker
34*9880d681SAndroid Build Coastguard Worker; CHECK: define void @test5(i8** nocapture %p, i8* %q)
35*9880d681SAndroid Build Coastguard Worker; Missed optz'n: we could make %q readnone, but don't break test6!
36*9880d681SAndroid Build Coastguard Workerdefine void @test5(i8** %p, i8* %q) {
37*9880d681SAndroid Build Coastguard Worker  store i8* %q, i8** %p
38*9880d681SAndroid Build Coastguard Worker  ret void
39*9880d681SAndroid Build Coastguard Worker}
40*9880d681SAndroid Build Coastguard Worker
41*9880d681SAndroid Build Coastguard Workerdeclare void @test6_1()
42*9880d681SAndroid Build Coastguard Worker; CHECK: define void @test6_2(i8** nocapture %p, i8* %q)
43*9880d681SAndroid Build Coastguard Worker; This is not a missed optz'n.
44*9880d681SAndroid Build Coastguard Workerdefine void @test6_2(i8** %p, i8* %q) {
45*9880d681SAndroid Build Coastguard Worker  store i8* %q, i8** %p
46*9880d681SAndroid Build Coastguard Worker  call void @test6_1()
47*9880d681SAndroid Build Coastguard Worker  ret void
48*9880d681SAndroid Build Coastguard Worker}
49*9880d681SAndroid Build Coastguard Worker
50*9880d681SAndroid Build Coastguard Worker; CHECK: define void @test7_1(i32* inalloca nocapture %a)
51*9880d681SAndroid Build Coastguard Worker; inalloca parameters are always considered written
52*9880d681SAndroid Build Coastguard Workerdefine void @test7_1(i32* inalloca %a) {
53*9880d681SAndroid Build Coastguard Worker  ret void
54*9880d681SAndroid Build Coastguard Worker}
55*9880d681SAndroid Build Coastguard Worker
56*9880d681SAndroid Build Coastguard Worker; CHECK: define i32* @test8_1(i32* readnone %p)
57*9880d681SAndroid Build Coastguard Workerdefine i32* @test8_1(i32* %p) {
58*9880d681SAndroid Build Coastguard Workerentry:
59*9880d681SAndroid Build Coastguard Worker  ret i32* %p
60*9880d681SAndroid Build Coastguard Worker}
61*9880d681SAndroid Build Coastguard Worker
62*9880d681SAndroid Build Coastguard Worker; CHECK: define void @test8_2(i32* %p)
63*9880d681SAndroid Build Coastguard Workerdefine void @test8_2(i32* %p) {
64*9880d681SAndroid Build Coastguard Workerentry:
65*9880d681SAndroid Build Coastguard Worker  %call = call i32* @test8_1(i32* %p)
66*9880d681SAndroid Build Coastguard Worker  store i32 10, i32* %call, align 4
67*9880d681SAndroid Build Coastguard Worker  ret void
68*9880d681SAndroid Build Coastguard Worker}
69*9880d681SAndroid Build Coastguard Worker
70*9880d681SAndroid Build Coastguard Worker; CHECK: declare void @llvm.masked.scatter
71*9880d681SAndroid Build Coastguard Workerdeclare void @llvm.masked.scatter.v4i32(<4 x i32>%val, <4 x i32*>, i32, <4 x i1>)
72*9880d681SAndroid Build Coastguard Worker
73*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: readnone
74*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: readonly
75*9880d681SAndroid Build Coastguard Worker; CHECK: define void @test9
76*9880d681SAndroid Build Coastguard Workerdefine void @test9(<4 x i32*> %ptrs, <4 x i32>%val) {
77*9880d681SAndroid Build Coastguard Worker  call void @llvm.masked.scatter.v4i32(<4 x i32>%val, <4 x i32*> %ptrs, i32 4, <4 x i1><i1 true, i1 false, i1 true, i1 false>)
78*9880d681SAndroid Build Coastguard Worker  ret void
79*9880d681SAndroid Build Coastguard Worker}
80*9880d681SAndroid Build Coastguard Worker
81*9880d681SAndroid Build Coastguard Worker; CHECK: declare <4 x i32> @llvm.masked.gather
82*9880d681SAndroid Build Coastguard Workerdeclare <4 x i32> @llvm.masked.gather.v4i32(<4 x i32*>, i32, <4 x i1>, <4 x i32>)
83*9880d681SAndroid Build Coastguard Worker; CHECK: readonly
84*9880d681SAndroid Build Coastguard Worker; CHECK: define <4 x i32> @test10
85*9880d681SAndroid Build Coastguard Workerdefine <4 x i32> @test10(<4 x i32*> %ptrs) {
86*9880d681SAndroid Build Coastguard Worker  %res = call <4 x i32> @llvm.masked.gather.v4i32(<4 x i32*> %ptrs, i32 4, <4 x i1><i1 true, i1 false, i1 true, i1 false>, <4 x i32>undef)
87*9880d681SAndroid Build Coastguard Worker  ret <4 x i32> %res
88*9880d681SAndroid Build Coastguard Worker}
89*9880d681SAndroid Build Coastguard Worker
90*9880d681SAndroid Build Coastguard Worker; CHECK: declare <4 x i32> @test11_1
91*9880d681SAndroid Build Coastguard Workerdeclare <4 x i32> @test11_1(<4 x i32*>) argmemonly nounwind readonly
92*9880d681SAndroid Build Coastguard Worker; CHECK: readonly
93*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: readnone
94*9880d681SAndroid Build Coastguard Worker; CHECK: define <4 x i32> @test11_2
95*9880d681SAndroid Build Coastguard Workerdefine <4 x i32> @test11_2(<4 x i32*> %ptrs) {
96*9880d681SAndroid Build Coastguard Worker  %res = call <4 x i32> @test11_1(<4 x i32*> %ptrs)
97*9880d681SAndroid Build Coastguard Worker  ret <4 x i32> %res
98*9880d681SAndroid Build Coastguard Worker}
99*9880d681SAndroid Build Coastguard Worker
100*9880d681SAndroid Build Coastguard Workerdeclare <4 x i32> @test12_1(<4 x i32*>) argmemonly nounwind
101*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: readnone
102*9880d681SAndroid Build Coastguard Worker; CHECK: define <4 x i32> @test12_2
103*9880d681SAndroid Build Coastguard Workerdefine <4 x i32> @test12_2(<4 x i32*> %ptrs) {
104*9880d681SAndroid Build Coastguard Worker  %res = call <4 x i32> @test12_1(<4 x i32*> %ptrs)
105*9880d681SAndroid Build Coastguard Worker  ret <4 x i32> %res
106*9880d681SAndroid Build Coastguard Worker}
107*9880d681SAndroid Build Coastguard Worker
108*9880d681SAndroid Build Coastguard Worker; CHECK: define i32 @volatile_load(
109*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: readonly
110*9880d681SAndroid Build Coastguard Worker; CHECK: ret
111*9880d681SAndroid Build Coastguard Workerdefine i32 @volatile_load(i32* %p) {
112*9880d681SAndroid Build Coastguard Worker  %load = load volatile i32, i32* %p
113*9880d681SAndroid Build Coastguard Worker  ret i32 %load
114*9880d681SAndroid Build Coastguard Worker}
115