xref: /llvm-project/llvm/test/Transforms/InstCombine/icmp-select-implies-common-op.ll (revision a105877646d68e48cdeeeadd9d1e075dc3c5d68d) 
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -passes=instcombine < %s | FileCheck %s
3
4define i1 @sgt_3_impliesF_eq_2(i8 %x, i8 %y) {
5; CHECK-LABEL: @sgt_3_impliesF_eq_2(
6; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i8 [[X:%.*]], 4
7; CHECK-NEXT:    [[CMP21:%.*]] = icmp eq i8 [[Y:%.*]], [[X]]
8; CHECK-NEXT:    [[CMP2:%.*]] = select i1 [[CMP]], i1 [[CMP21]], i1 false
9; CHECK-NEXT:    ret i1 [[CMP2]]
10;
11  %cmp = icmp sgt i8 %x, 3
12  %sel = select i1 %cmp, i8 2, i8 %y
13  %cmp2 = icmp eq i8 %sel, %x
14  ret i1 %cmp2
15}
16
17define i1 @sgt_3_impliesT_sgt_2(i8 %x, i8 %y) {
18; CHECK-LABEL: @sgt_3_impliesT_sgt_2(
19; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i8 [[X:%.*]], 4
20; CHECK-NEXT:    [[CMP21:%.*]] = icmp sgt i8 [[Y:%.*]], [[X]]
21; CHECK-NEXT:    [[CMP2:%.*]] = select i1 [[CMP]], i1 [[CMP21]], i1 false
22; CHECK-NEXT:    ret i1 [[CMP2]]
23;
24  %cmp = icmp sgt i8 %x, 3
25  %sel = select i1 %cmp, i8 2, i8 %y
26  %cmp2 = icmp sgt i8 %sel, %x
27  ret i1 %cmp2
28}
29
30define i1 @sgt_x_impliesF_eq_smin_todo(i8 %x, i8 %y, i8 %z) {
31; CHECK-LABEL: @sgt_x_impliesF_eq_smin_todo(
32; CHECK-NEXT:    [[CMP:%.*]] = icmp sle i8 [[X:%.*]], [[Z:%.*]]
33; CHECK-NEXT:    [[CMP21:%.*]] = icmp eq i8 [[Y:%.*]], [[X]]
34; CHECK-NEXT:    [[CMP2:%.*]] = select i1 [[CMP]], i1 [[CMP21]], i1 false
35; CHECK-NEXT:    ret i1 [[CMP2]]
36;
37  %cmp = icmp sgt i8 %x, %z
38  %sel = select i1 %cmp, i8 -128, i8 %y
39  %cmp2 = icmp eq i8 %sel, %x
40  ret i1 %cmp2
41}
42
43define i1 @slt_x_impliesT_ne_smin_todo(i8 %x, i8 %y, i8 %z) {
44; CHECK-LABEL: @slt_x_impliesT_ne_smin_todo(
45; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i8 [[X:%.*]], [[Z:%.*]]
46; CHECK-NEXT:    [[CMP21:%.*]] = icmp ne i8 [[Y:%.*]], [[X]]
47; CHECK-NEXT:    [[CMP2:%.*]] = select i1 [[CMP]], i1 true, i1 [[CMP21]]
48; CHECK-NEXT:    ret i1 [[CMP2]]
49;
50  %cmp = icmp slt i8 %x, %z
51  %sel = select i1 %cmp, i8 127, i8 %y
52  %cmp2 = icmp ne i8 %x, %sel
53  ret i1 %cmp2
54}
55
56define i1 @ult_x_impliesT_eq_umax_todo(i8 %x, i8 %y, i8 %z) {
57; CHECK-LABEL: @ult_x_impliesT_eq_umax_todo(
58; CHECK-NEXT:    [[CMP:%.*]] = icmp ugt i8 [[Z:%.*]], [[X:%.*]]
59; CHECK-NEXT:    [[CMP21:%.*]] = icmp ne i8 [[Y:%.*]], [[X]]
60; CHECK-NEXT:    [[CMP2:%.*]] = select i1 [[CMP]], i1 true, i1 [[CMP21]]
61; CHECK-NEXT:    ret i1 [[CMP2]]
62;
63  %cmp = icmp ugt i8 %z, %x
64  %sel = select i1 %cmp, i8 255, i8 %y
65  %cmp2 = icmp ne i8 %sel, %x
66  ret i1 %cmp2
67}
68
69define i1 @ult_1_impliesF_eq_1(i8 %x, i8 %y) {
70; CHECK-LABEL: @ult_1_impliesF_eq_1(
71; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i8 [[X:%.*]], 0
72; CHECK-NEXT:    [[CMP21:%.*]] = icmp eq i8 [[Y:%.*]], [[X]]
73; CHECK-NEXT:    [[CMP2:%.*]] = select i1 [[CMP]], i1 [[CMP21]], i1 false
74; CHECK-NEXT:    ret i1 [[CMP2]]
75;
76  %cmp = icmp ult i8 %x, 1
77  %sel = select i1 %cmp, i8 1, i8 %y
78  %cmp2 = icmp eq i8 %x, %sel
79  ret i1 %cmp2
80}
81
82define i1 @ugt_x_impliesF_eq_umin_todo(i8 %x, i8 %y, i8 %z) {
83; CHECK-LABEL: @ugt_x_impliesF_eq_umin_todo(
84; CHECK-NEXT:    [[CMP:%.*]] = icmp ugt i8 [[Z:%.*]], [[X:%.*]]
85; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[CMP]], i8 0, i8 [[Y:%.*]]
86; CHECK-NEXT:    [[CMP2:%.*]] = icmp eq i8 [[X]], [[SEL]]
87; CHECK-NEXT:    ret i1 [[CMP2]]
88;
89  %cmp = icmp ugt i8 %z, %x
90  %sel = select i1 %cmp, i8 0, i8 %y
91  %cmp2 = icmp eq i8 %x, %sel
92  ret i1 %cmp2
93}
94