1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 ; These patterns are all just traditional clamp pattern.
5 ; But they are not canonical, the and/or/xor is more canonically represented
8 define i32 @t0_select_cond_and_v0(i32 %X) {
9 ; CHECK-LABEL: @t0_select_cond_and_v0(
10 ; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
11 ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
12 ; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
13 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
14 ; CHECK-NEXT: ret i32 [[R]]
16 %dont_need_to_clamp_positive = icmp sle i32 %X, 32767
17 %dont_need_to_clamp_negative = icmp sge i32 %X, -32768
18 %clamp_limit = select i1 %dont_need_to_clamp_positive, i32 -32768, i32 32767
19 %dont_need_to_clamp = and i1 %dont_need_to_clamp_positive, %dont_need_to_clamp_negative
20 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
23 define i32 @t1_select_cond_and_v1(i32 %X) {
24 ; CHECK-LABEL: @t1_select_cond_and_v1(
25 ; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
26 ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
27 ; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
28 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
29 ; CHECK-NEXT: ret i32 [[R]]
31 %dont_need_to_clamp_positive = icmp sle i32 %X, 32767
32 %dont_need_to_clamp_negative = icmp sge i32 %X, -32768
33 %clamp_limit = select i1 %dont_need_to_clamp_negative, i32 32767, i32 -32768
34 %dont_need_to_clamp = and i1 %dont_need_to_clamp_positive, %dont_need_to_clamp_negative
35 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
39 ;-------------------------------------------------------------------------------
41 define i32 @t2_select_cond_or_v0(i32 %X) {
42 ; CHECK-LABEL: @t2_select_cond_or_v0(
43 ; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
44 ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
45 ; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
46 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
47 ; CHECK-NEXT: ret i32 [[R]]
49 %need_to_clamp_positive = icmp sgt i32 %X, 32767
50 %need_to_clamp_negative = icmp slt i32 %X, -32768
51 %clamp_limit = select i1 %need_to_clamp_positive, i32 32767, i32 -32768
52 %need_to_clamp = or i1 %need_to_clamp_positive, %need_to_clamp_negative
53 %R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X
56 define i32 @t3_select_cond_or_v1(i32 %X) {
57 ; CHECK-LABEL: @t3_select_cond_or_v1(
58 ; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
59 ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -32768
60 ; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP2]], 32767
61 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP3]], i32 [[TMP2]], i32 32767
62 ; CHECK-NEXT: ret i32 [[R]]
64 %need_to_clamp_positive = icmp sgt i32 %X, 32767
65 %need_to_clamp_negative = icmp slt i32 %X, -32768
66 %clamp_limit = select i1 %need_to_clamp_negative, i32 -32768, i32 32767
67 %need_to_clamp = or i1 %need_to_clamp_positive, %need_to_clamp_negative
68 %R = select i1 %need_to_clamp, i32 %clamp_limit, i32 %X
72 ;-------------------------------------------------------------------------------
74 define i32 @t4_select_cond_xor_v0(i32 %X) {
75 ; CHECK-LABEL: @t4_select_cond_xor_v0(
76 ; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
77 ; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
78 ; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
79 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
80 ; CHECK-NEXT: ret i32 [[R]]
82 %need_to_clamp_positive = icmp sgt i32 %X, 32767
83 %dont_need_to_clamp_negative = icmp sgt i32 %X, -32768
84 %clamp_limit = select i1 %need_to_clamp_positive, i32 32767, i32 -32768
85 %dont_need_to_clamp = xor i1 %need_to_clamp_positive, %dont_need_to_clamp_negative
86 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
89 define i32 @t4_select_cond_xor_v1(i32 %X) {
90 ; CHECK-LABEL: @t4_select_cond_xor_v1(
91 ; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
92 ; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
93 ; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
94 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
95 ; CHECK-NEXT: ret i32 [[R]]
97 %need_to_clamp_positive = icmp sgt i32 %X, 32767
98 %dont_need_to_clamp_negative = icmp sgt i32 %X, -32768
99 %clamp_limit = select i1 %dont_need_to_clamp_negative, i32 32767, i32 -32768
100 %dont_need_to_clamp = xor i1 %need_to_clamp_positive, %dont_need_to_clamp_negative
101 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
105 define i32 @t5_select_cond_xor_v2(i32 %X) {
106 ; CHECK-LABEL: @t5_select_cond_xor_v2(
107 ; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
108 ; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
109 ; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
110 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
111 ; CHECK-NEXT: ret i32 [[R]]
113 %dont_need_to_clamp_positive = icmp sle i32 %X, 32767
114 %need_to_clamp_negative = icmp sle i32 %X, -32768
115 %clamp_limit = select i1 %need_to_clamp_negative, i32 -32768, i32 32767
116 %dont_need_to_clamp = xor i1 %dont_need_to_clamp_positive, %need_to_clamp_negative
117 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit
120 define i32 @t5_select_cond_xor_v3(i32 %X) {
121 ; CHECK-LABEL: @t5_select_cond_xor_v3(
122 ; CHECK-NEXT: [[DOTINV1:%.*]] = icmp sgt i32 [[X:%.*]], -32768
123 ; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[DOTINV1]], i32 [[X]], i32 -32768
124 ; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 32767
125 ; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP2]], i32 [[TMP1]], i32 32767
126 ; CHECK-NEXT: ret i32 [[R]]
128 %dont_need_to_clamp_positive = icmp sle i32 %X, 32767
129 %need_to_clamp_negative = icmp sle i32 %X, -32768
130 %clamp_limit = select i1 %dont_need_to_clamp_positive, i32 -32768, i32 32767
131 %dont_need_to_clamp = xor i1 %dont_need_to_clamp_positive, %need_to_clamp_negative
132 %R = select i1 %dont_need_to_clamp, i32 %X, i32 %clamp_limit