Skip to content

Commit 03634b0

Browse files
spaitsspaits
committed
Port test from #138373 
1 parent 911b97e commit 03634b0

File tree

1 file changed

+176
-0
lines changed

1 file changed

+176
-0
lines changed

‎llvm/test/Transforms/InstCombine/or-select-zero-icmp.ll‎

Lines changed: 176 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,176 @@
1+
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2+
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
3+
4+
; Basic functional test
5+
define i32 @basic(i32 %a, i32 %b) {
6+
; CHECK-LABEL: define i32 @basic(
7+
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
8+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A]], 0
9+
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[B]], i32 [[A]]
10+
; CHECK-NEXT: ret i32 [[RES]]
11+
;
12+
%cmp = icmp eq i32 %a, 0
13+
%sel = select i1 %cmp, i32 %b, i32 0
14+
%or = or i32 %sel, %a
15+
ret i32 %or
16+
}
17+
18+
; Operand order swap test
19+
define i32 @swap_operand_order(i32 %x, i32 %y) {
20+
; CHECK-LABEL: define i32 @swap_operand_order(
21+
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
22+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
23+
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[Y]], i32 [[X]]
24+
; CHECK-NEXT: ret i32 [[RES]]
25+
;
26+
%cmp = icmp eq i32 %x, 0
27+
%sel = select i1 %cmp, i32 %y, i32 0
28+
%or = or i32 %x, %sel
29+
ret i32 %or
30+
}
31+
32+
; Negative test: Non-zero false value in select
33+
define i32 @negative_non_zero_false_val(i32 %a, i32 %b) {
34+
; CHECK-LABEL: define i32 @negative_non_zero_false_val(
35+
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
36+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A]], 0
37+
; CHECK-NEXT: [[TMP1:%.*]] = or i32 [[A]], 1
38+
; CHECK-NEXT: [[OR:%.*]] = select i1 [[CMP]], i32 [[B]], i32 [[TMP1]]
39+
; CHECK-NEXT: ret i32 [[OR]]
40+
;
41+
%cmp = icmp eq i32 %a, 0
42+
%sel = select i1 %cmp, i32 %b, i32 1
43+
%or = or i32 %sel, %a
44+
ret i32 %or
45+
}
46+
47+
; Negative test: Incorrect comparison predicate (NE)
48+
define i32 @negative_wrong_predicate(i32 %a, i32 %b) {
49+
; CHECK-LABEL: define i32 @negative_wrong_predicate(
50+
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
51+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A]], 0
52+
; CHECK-NEXT: [[TMP1:%.*]] = or i32 [[B]], [[A]]
53+
; CHECK-NEXT: [[OR:%.*]] = select i1 [[CMP]], i32 0, i32 [[TMP1]]
54+
; CHECK-NEXT: ret i32 [[OR]]
55+
;
56+
%cmp = icmp ne i32 %a, 0
57+
%sel = select i1 %cmp, i32 %b, i32 0
58+
%or = or i32 %sel, %a
59+
ret i32 %or
60+
}
61+
62+
; Comparison direction swap test (0 == X)
63+
define i32 @cmp_swapped(i32 %x, i32 %y) {
64+
; CHECK-LABEL: define i32 @cmp_swapped(
65+
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
66+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
67+
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[Y]], i32 [[X]]
68+
; CHECK-NEXT: ret i32 [[RES]]
69+
;
70+
%cmp = icmp eq i32 0, %x
71+
%sel = select i1 %cmp, i32 %y, i32 0
72+
%or = or i32 %x, %sel
73+
ret i32 %or
74+
}
75+
76+
; Complex expression test
77+
define i32 @complex_expression(i32 %a, i32 %b) {
78+
; CHECK-LABEL: define i32 @complex_expression(
79+
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
80+
; CHECK-NEXT: [[X:%.*]] = add i32 [[A]], 1
81+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
82+
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[B]], i32 [[X]]
83+
; CHECK-NEXT: ret i32 [[RES]]
84+
;
85+
%x = add i32 %a, 1
86+
%cmp = icmp eq i32 %x, 0
87+
%sel = select i1 %cmp, i32 %b, i32 0
88+
%or = or i32 %sel, %x
89+
ret i32 %or
90+
}
91+
92+
; zext test
93+
define i32 @zext_cond(i8 %a, i32 %b) {
94+
; CHECK-LABEL: define i32 @zext_cond(
95+
; CHECK-SAME: i8 [[A:%.*]], i32 [[B:%.*]]) {
96+
; CHECK-NEXT: [[Z:%.*]] = zext i8 [[A]] to i32
97+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A]], 0
98+
; CHECK-NEXT: [[OR:%.*]] = select i1 [[CMP]], i32 [[B]], i32 [[Z]]
99+
; CHECK-NEXT: ret i32 [[OR]]
100+
;
101+
%z = zext i8 %a to i32
102+
%cmp = icmp eq i8 %a, 0
103+
%sel = select i1 %cmp, i32 %b, i32 0
104+
%or = or i32 %sel, %z
105+
ret i32 %or
106+
}
107+
108+
; sext test
109+
define i32 @sext_cond(i8 %a, i32 %b) {
110+
; CHECK-LABEL: define i32 @sext_cond(
111+
; CHECK-SAME: i8 [[A:%.*]], i32 [[B:%.*]]) {
112+
; CHECK-NEXT: [[S:%.*]] = sext i8 [[A]] to i32
113+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A]], 0
114+
; CHECK-NEXT: [[OR:%.*]] = select i1 [[CMP]], i32 [[B]], i32 [[S]]
115+
; CHECK-NEXT: ret i32 [[OR]]
116+
;
117+
%s = sext i8 %a to i32
118+
%cmp = icmp eq i8 %a, 0
119+
%sel = select i1 %cmp, i32 %b, i32 0
120+
%or = or i32 %sel, %s
121+
ret i32 %or
122+
}
123+
124+
; Vector type test
125+
define <2 x i32> @vector_type(<2 x i32> %a, <2 x i32> %b) {
126+
; CHECK-LABEL: define <2 x i32> @vector_type(
127+
; CHECK-SAME: <2 x i32> [[A:%.*]], <2 x i32> [[B:%.*]]) {
128+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq <2 x i32> [[A]], zeroinitializer
129+
; CHECK-NEXT: [[RES:%.*]] = select <2 x i1> [[CMP]], <2 x i32> [[B]], <2 x i32> [[A]]
130+
; CHECK-NEXT: ret <2 x i32> [[RES]]
131+
;
132+
%cmp = icmp eq <2 x i32> %a, zeroinitializer
133+
%sel = select <2 x i1> %cmp, <2 x i32> %b, <2 x i32> zeroinitializer
134+
%or = or <2 x i32> %sel, %a
135+
ret <2 x i32> %or
136+
}
137+
138+
; Pointer type test (should not trigger optimization)
139+
define ptr @pointer_type(ptr %p, ptr %q) {
140+
; CHECK-LABEL: define ptr @pointer_type(
141+
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]]) {
142+
; CHECK-NEXT: [[A:%.*]] = ptrtoint ptr [[P]] to i64
143+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[P]], null
144+
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], ptr [[Q]], ptr null
145+
; CHECK-NEXT: [[SEL_INT:%.*]] = ptrtoint ptr [[SEL]] to i64
146+
; CHECK-NEXT: [[OR:%.*]] = or i64 [[A]], [[SEL_INT]]
147+
; CHECK-NEXT: [[RET:%.*]] = inttoptr i64 [[OR]] to ptr
148+
; CHECK-NEXT: ret ptr [[RET]]
149+
;
150+
%a = ptrtoint ptr %p to i64
151+
%cmp = icmp eq i64 %a, 0
152+
%sel = select i1 %cmp, ptr %q, ptr null
153+
%sel_int = ptrtoint ptr %sel to i64
154+
%or_val = or i64 %a, %sel_int
155+
%ret = inttoptr i64 %or_val to ptr
156+
ret ptr %ret
157+
}
158+
159+
; Multi-use test (should not trigger optimization)
160+
define i32 @multi_use_test(i32 %x, i32 %m) {
161+
; CHECK-LABEL: define i32 @multi_use_test(
162+
; CHECK-SAME: i32 [[X:%.*]], i32 [[M:%.*]]) {
163+
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
164+
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[M]], i32 0
165+
; CHECK-NEXT: [[OR:%.*]] = or i32 [[SEL]], [[X]]
166+
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[SEL]], [[X]]
167+
; CHECK-NEXT: [[O2:%.*]] = sub i32 [[OR]], [[ADD]]
168+
; CHECK-NEXT: ret i32 [[O2]]
169+
;
170+
%cmp = icmp eq i32 %x, 0
171+
%sel = select i1 %cmp, i32 %m, i32 0
172+
%or = or i32 %sel, %x
173+
%add = add i32 %sel, %x
174+
%res = sub i32 %or, %add
175+
ret i32 %res
176+
}

0 commit comments

Comments
 (0)