source: icGREP/icgrep-devel/llvm-3.8.0.src/test/CodeGen/AArch64/mul_pow2.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 2.0 KB
Line 
1; RUN: llc < %s -march=aarch64 | FileCheck %s
2
3; Convert mul x, pow2 to shift.
4; Convert mul x, pow2 +/- 1 to shift + add/sub.
5
6define i32 @test2(i32 %x) {
7; CHECK-LABEL: test2
8; CHECK: lsl w0, w0, #1
9
10  %mul = shl nsw i32 %x, 1
11  ret i32 %mul
12}
13
14define i32 @test3(i32 %x) {
15; CHECK-LABEL: test3
16; CHECK: add w0, w0, w0, lsl #1
17
18  %mul = mul nsw i32 %x, 3
19  ret i32 %mul
20}
21
22define i32 @test4(i32 %x) {
23; CHECK-LABEL: test4
24; CHECK: lsl w0, w0, #2
25
26  %mul = shl nsw i32 %x, 2
27  ret i32 %mul
28}
29
30define i32 @test5(i32 %x) {
31; CHECK-LABEL: test5
32; CHECK: add w0, w0, w0, lsl #2
33
34
35  %mul = mul nsw i32 %x, 5
36  ret i32 %mul
37}
38
39define i32 @test7(i32 %x) {
40; CHECK-LABEL: test7
41; CHECK: lsl {{w[0-9]+}}, w0, #3
42; CHECK: sub w0, {{w[0-9]+}}, w0
43
44  %mul = mul nsw i32 %x, 7
45  ret i32 %mul
46}
47
48define i32 @test8(i32 %x) {
49; CHECK-LABEL: test8
50; CHECK: lsl w0, w0, #3
51
52  %mul = shl nsw i32 %x, 3
53  ret i32 %mul
54}
55
56define i32 @test9(i32 %x) {
57; CHECK-LABEL: test9
58; CHECK: add w0, w0, w0, lsl #3
59
60  %mul = mul nsw i32 %x, 9
61  ret i32 %mul
62}
63
64; Convert mul x, -pow2 to shift.
65; Convert mul x, -(pow2 +/- 1) to shift + add/sub.
66
67define i32 @ntest2(i32 %x) {
68; CHECK-LABEL: ntest2
69; CHECK: neg w0, w0, lsl #1
70
71  %mul = mul nsw i32 %x, -2
72  ret i32 %mul
73}
74
75define i32 @ntest3(i32 %x) {
76; CHECK-LABEL: ntest3
77; CHECK: sub w0, w0, w0, lsl #2
78
79  %mul = mul nsw i32 %x, -3
80  ret i32 %mul
81}
82
83define i32 @ntest4(i32 %x) {
84; CHECK-LABEL: ntest4
85; CHECK:neg w0, w0, lsl #2
86
87  %mul = mul nsw i32 %x, -4
88  ret i32 %mul
89}
90
91define i32 @ntest5(i32 %x) {
92; CHECK-LABEL: ntest5
93; CHECK: add {{w[0-9]+}}, w0, w0, lsl #2
94; CHECK: neg w0, {{w[0-9]+}}
95  %mul = mul nsw i32 %x, -5
96  ret i32 %mul
97}
98
99define i32 @ntest7(i32 %x) {
100; CHECK-LABEL: ntest7
101; CHECK: sub w0, w0, w0, lsl #3
102
103  %mul = mul nsw i32 %x, -7
104  ret i32 %mul
105}
106
107define i32 @ntest8(i32 %x) {
108; CHECK-LABEL: ntest8
109; CHECK: neg w0, w0, lsl #3
110
111  %mul = mul nsw i32 %x, -8
112  ret i32 %mul
113}
114
115define i32 @ntest9(i32 %x) {
116; CHECK-LABEL: ntest9
117; CHECK: add {{w[0-9]+}}, w0, w0, lsl #3
118; CHECK: neg w0, {{w[0-9]+}}
119
120  %mul = mul nsw i32 %x, -9
121  ret i32 %mul
122}
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