1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; Test memset 0 with variable length
3;
4; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
5
6define void @fun0(i8* %Addr, i64 %Len) {
7; CHECK-LABEL: fun0:
8; CHECK:       # %bb.0:
9; CHECK-NEXT:    aghi %r3, -1
10; CHECK-NEXT:    cgibe %r3, -1, 0(%r14)
11; CHECK-NEXT:  .LBB0_1:
12; CHECK-NEXT:    srlg %r0, %r3, 8
13; CHECK-NEXT:    cgije %r0, 0, .LBB0_3
14; CHECK-NEXT:  .LBB0_2: # =>This Inner Loop Header: Depth=1
15; CHECK-NEXT:    xc 0(256,%r2), 0(%r2)
16; CHECK-NEXT:    la %r2, 256(%r2)
17; CHECK-NEXT:    brctg %r0, .LBB0_2
18; CHECK-NEXT:  .LBB0_3:
19; CHECK-NEXT:    exrl %r3, .Ltmp0
20; CHECK-NEXT:    br %r14
21  tail call void @llvm.memset.p0i8.i64(i8* %Addr, i8 0, i64 %Len, i1 false)
22  ret void
23}
24
25define void @fun1(i8* %Addr, i32 %Len) {
26; CHECK-LABEL: fun1:
27; CHECK:       # %bb.0:
28; CHECK-NEXT:    llgfr %r1, %r3
29; CHECK-NEXT:    aghi %r1, -1
30; CHECK-NEXT:    cgibe %r1, -1, 0(%r14)
31; CHECK-NEXT:  .LBB1_1:
32; CHECK-NEXT:    srlg %r0, %r1, 8
33; CHECK-NEXT:    cgije %r0, 0, .LBB1_3
34; CHECK-NEXT:  .LBB1_2: # =>This Inner Loop Header: Depth=1
35; CHECK-NEXT:    xc 0(256,%r2), 0(%r2)
36; CHECK-NEXT:    la %r2, 256(%r2)
37; CHECK-NEXT:    brctg %r0, .LBB1_2
38; CHECK-NEXT:  .LBB1_3:
39; CHECK-NEXT:    exrl %r1, .Ltmp0
40; CHECK-NEXT:    br %r14
41  tail call void @llvm.memset.p0i8.i32(i8* %Addr, i8 0, i32 %Len, i1 false)
42  ret void
43}
44
45; Test that identical target instructions get reused.
46define void @fun2(i8* %Addr, i32 %Len) {
47; CHECK-LABEL: fun2:
48; CHECK:       # %bb.0:
49; CHECK-NEXT:    llgfr %r1, %r3
50; CHECK-NEXT:    aghi %r1, -1
51; CHECK-NEXT:    srlg %r0, %r1, 8
52; CHECK-NEXT:    cgije %r1, -1, .LBB2_5
53; CHECK-NEXT:  # %bb.1:
54; CHECK-NEXT:    lgr %r3, %r2
55; CHECK-NEXT:    cgije %r0, 0, .LBB2_4
56; CHECK-NEXT:  # %bb.2:
57; CHECK-NEXT:    lgr %r3, %r2
58; CHECK-NEXT:    lgr %r4, %r0
59; CHECK-NEXT:  .LBB2_3: # =>This Inner Loop Header: Depth=1
60; CHECK-NEXT:    xc 0(256,%r3), 0(%r3)
61; CHECK-NEXT:    la %r3, 256(%r3)
62; CHECK-NEXT:    brctg %r4, .LBB2_3
63; CHECK-NEXT:  .LBB2_4:
64; CHECK-NEXT:    exrl %r1, .Ltmp1
65; CHECK-NEXT:  .LBB2_5:
66; CHECK-NEXT:    cgije %r1, -1, .LBB2_10
67; CHECK-NEXT:  # %bb.6:
68; CHECK-NEXT:    lgr %r3, %r2
69; CHECK-NEXT:    cgije %r0, 0, .LBB2_9
70; CHECK-NEXT:  # %bb.7:
71; CHECK-NEXT:    lgr %r3, %r2
72; CHECK-NEXT:    lgr %r4, %r0
73; CHECK-NEXT:  .LBB2_8: # =>This Inner Loop Header: Depth=1
74; CHECK-NEXT:    xc 0(256,%r3), 0(%r3)
75; CHECK-NEXT:    la %r3, 256(%r3)
76; CHECK-NEXT:    brctg %r4, .LBB2_8
77; CHECK-NEXT:  .LBB2_9:
78; CHECK-NEXT:    exrl %r1, .Ltmp1
79; CHECK-NEXT:  .LBB2_10:
80; CHECK-NEXT:    cgibe %r1, -1, 0(%r14)
81; CHECK-NEXT:  .LBB2_11:
82; CHECK-NEXT:    cgije %r0, 0, .LBB2_13
83; CHECK-NEXT:  .LBB2_12: # =>This Inner Loop Header: Depth=1
84; CHECK-NEXT:    xc 0(256,%r2), 0(%r2)
85; CHECK-NEXT:    la %r2, 256(%r2)
86; CHECK-NEXT:    brctg %r0, .LBB2_12
87; CHECK-NEXT:  .LBB2_13:
88; CHECK-NEXT:    exrl %r1, .Ltmp0
89; CHECK-NEXT:    br %r14
90  tail call void @llvm.memset.p0i8.i32(i8* %Addr, i8 0, i32 %Len, i1 false)
91  tail call void @llvm.memset.p0i8.i32(i8* %Addr, i8 0, i32 %Len, i1 false)
92  tail call void @llvm.memset.p0i8.i32(i8* %Addr, i8 0, i32 %Len, i1 false)
93  ret void
94}
95
96; Test that a memset to nullptr compiles.
97define void @fun3(i64 %Len) {
98; CHECK-LABEL: fun3:
99; CHECK:       # %bb.0:
100; CHECK-NEXT:    aghi %r2, -1
101; CHECK-NEXT:    cgibe %r2, -1, 0(%r14)
102; CHECK-NEXT:  .LBB3_1:
103; CHECK-NEXT:    srlg %r0, %r2, 8
104; CHECK-NEXT:    lghi %r1, 0
105; CHECK-NEXT:    cgije %r0, 0, .LBB3_3
106; CHECK-NEXT:  .LBB3_2: # =>This Inner Loop Header: Depth=1
107; CHECK-NEXT:    xc 0(256,%r1), 0(%r1)
108; CHECK-NEXT:    la %r1, 256(%r1)
109; CHECK-NEXT:    brctg %r0, .LBB3_2
110; CHECK-NEXT:  .LBB3_3:
111; CHECK-NEXT:    exrl %r2, .Ltmp2
112; CHECK-NEXT:    br %r14
113  call void @llvm.memset.p0i8.i64(i8* null, i8 0, i64 %Len, i1 false)
114  ret void
115}
116
117; CHECK:       .Ltmp2:
118; CHECK-NEXT: 	 xc 0(1,%r1), 0(%r1)
119; CHECK-NEXT:  .Ltmp0:
120; CHECK-NEXT:    xc 0(1,%r2), 0(%r2)
121; CHECK-NEXT:  .Ltmp1:
122; CHECK-NEXT:    xc 0(1,%r3), 0(%r3)
123
124declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg)
125declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1 immarg)
126