1 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 ; CHECK: sdiv i32 %x, 8
5 define i32 @sdiv1(i32 %x) {
11 ; CHECK: %y = srem i32 %x, 3
12 ; CHECK: %z = sub i32 %x, %y
14 define i32 @sdiv3(i32 %x) {
22 define i32 @sdiv4(i32 %x) {
23 %y = sdiv exact i32 %x, 3
29 ; CHECK: %y = srem i32 %x, 3
30 ; CHECK: %z = sub i32 %y, %x
32 define i32 @sdiv5(i32 %x) {
39 ; CHECK: %z = sub i32 0, %x
41 define i32 @sdiv6(i32 %x) {
42 %y = sdiv exact i32 %x, 3
49 define i32 @udiv1(i32 %x, i32 %w) {
50 %y = udiv exact i32 %x, %w
56 ; CHECK: %B = icmp eq i64 %X, 0
58 define i1 @ashr_icmp(i64 %X) nounwind {
59 %A = ashr exact i64 %X, 2 ; X/4
60 %B = icmp eq i64 %A, 0
65 ; CHECK: icmp ne i64 %X, 0
66 define i1 @udiv_icmp1(i64 %X) nounwind {
67 %A = udiv exact i64 %X, 5 ; X/5
68 %B = icmp ne i64 %A, 0
73 ; CHECK: icmp eq i64 %X, 0
74 define i1 @sdiv_icmp1(i64 %X) nounwind {
75 %A = sdiv exact i64 %X, 5 ; X/5 == 0 --> x == 0
76 %B = icmp eq i64 %A, 0
81 ; CHECK: icmp eq i64 %X, 5
82 define i1 @sdiv_icmp2(i64 %X) nounwind {
83 %A = sdiv exact i64 %X, 5 ; X/5 == 1 --> x == 5
84 %B = icmp eq i64 %A, 1
89 ; CHECK: icmp eq i64 %X, -5
90 define i1 @sdiv_icmp3(i64 %X) nounwind {
91 %A = sdiv exact i64 %X, 5 ; X/5 == -1 --> x == -5
92 %B = icmp eq i64 %A, -1
97 ; CHECK: icmp eq i64 %X, 0
98 define i1 @sdiv_icmp4(i64 %X) nounwind {
99 %A = sdiv exact i64 %X, -5 ; X/-5 == 0 --> x == 0
100 %B = icmp eq i64 %A, 0
105 ; CHECK: icmp eq i64 %X, -5
106 define i1 @sdiv_icmp5(i64 %X) nounwind {
107 %A = sdiv exact i64 %X, -5 ; X/-5 == 1 --> x == -5
108 %B = icmp eq i64 %A, 1
113 ; CHECK: icmp eq i64 %X, 5
114 define i1 @sdiv_icmp6(i64 %X) nounwind {
115 %A = sdiv exact i64 %X, -5 ; X/-5 == 1 --> x == 5
116 %B = icmp eq i64 %A, -1