1 ; RUN: llc -mtriple=aarch64 -mcpu=cortex-a53 < %s | FileCheck %s
3 ; Tests to check that zero stores which are generated as STP xzr, xzr aren't
4 ; scheduled incorrectly due to incorrect alias information
6 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
7 %struct.tree_common = type { i8*, i8*, i32 }
9 ; Original test case which exhibited the bug
10 define void @test1(%struct.tree_common* %t, i32 %code, i8* %type) {
12 ; CHECK-DAG: stp x2, xzr, [x0, #8]
13 ; CHECK-DAG: str w1, [x0, #16]
14 ; CHECK-DAG: str xzr, [x0]
16 %0 = bitcast %struct.tree_common* %t to i8*
17 tail call void @llvm.memset.p0i8.i64(i8* align 8 %0, i8 0, i64 24, i1 false)
18 %code1 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %t, i64 0, i32 2
19 store i32 %code, i32* %code1, align 8
20 %type2 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %t, i64 0, i32 1
21 store i8* %type, i8** %type2, align 8
25 ; Store to each struct element instead of using memset
26 define void @test2(%struct.tree_common* %t, i32 %code, i8* %type) {
28 ; CHECK-DAG: str w1, [x0, #16]
29 ; CHECK-DAG: stp xzr, x2, [x0]
31 %0 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %t, i64 0, i32 0
32 %1 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %t, i64 0, i32 1
33 %2 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %t, i64 0, i32 2
34 store i8* zeroinitializer, i8** %0, align 8
35 store i8* zeroinitializer, i8** %1, align 8
36 store i32 zeroinitializer, i32* %2, align 8
37 store i32 %code, i32* %2, align 8
38 store i8* %type, i8** %1, align 8
42 ; Vector store instead of memset
43 define void @test3(%struct.tree_common* %t, i32 %code, i8* %type) {
45 ; CHECK-DAG: stp x2, xzr, [x0, #8]
46 ; CHECK-DAG: str w1, [x0, #16]
47 ; CHECK-DAG: str xzr, [x0]
49 %0 = bitcast %struct.tree_common* %t to <3 x i64>*
50 store <3 x i64> zeroinitializer, <3 x i64>* %0, align 8
51 %code1 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %t, i64 0, i32 2
52 store i32 %code, i32* %code1, align 8
53 %type2 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %t, i64 0, i32 1
54 store i8* %type, i8** %type2, align 8
58 ; Vector store, then store to vector elements
59 define void @test4(<3 x i64>* %p, i64 %x, i64 %y) {
61 ; CHECK-DAG: stp x2, x1, [x0, #8]
62 ; CHECK-DAG: str xzr, [x0]
64 store <3 x i64> zeroinitializer, <3 x i64>* %p, align 8
65 %0 = bitcast <3 x i64>* %p to i64*
66 %1 = getelementptr inbounds i64, i64* %0, i64 2
67 store i64 %x, i64* %1, align 8
68 %2 = getelementptr inbounds i64, i64* %0, i64 1
69 store i64 %y, i64* %2, align 8