1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
@.str = private unnamed_addr constant [27 x i8] c"abcdefghijklmnopqrstuvwxyz\00", align 1
@.str.1 = private unnamed_addr constant [2 x i8] c"\0D\0A", align 1
declare ptr @strchr(ptr, i32)
declare ptr @memchr(ptr, i32, i64)
define zeroext i1 @strchr_to_memchr_n_equals_len(i32 %c) {
; CHECK-LABEL: @strchr_to_memchr_n_equals_len(
; CHECK-NEXT: [[MEMCHR:%.*]] = tail call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 [[C:%.*]], i64 27)
; CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[MEMCHR]], null
; CHECK-NEXT: ret i1 [[CMP]]
;
%call = tail call ptr @strchr(ptr nonnull dereferenceable(27) @.str, i32 %c)
%cmp = icmp ne ptr %call, null
ret i1 %cmp
}
define zeroext i1 @memchr_n_equals_len(i32 %c) {
; CHECK-LABEL: @memchr_n_equals_len(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[C:%.*]] to i8
; CHECK-NEXT: [[TMP2:%.*]] = icmp ne i8 [[TMP1]], 10
; CHECK-NEXT: [[TMP3:%.*]] = icmp ne i8 [[TMP1]], 13
; CHECK-NEXT: [[CMP:%.*]] = and i1 [[TMP3]], [[TMP2]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%call = tail call ptr @memchr(ptr nonnull dereferenceable(3) @.str.1, i32 %c, i64 2)
%cmp = icmp eq ptr %call, null
ret i1 %cmp
}
define zeroext i1 @memchr_n_less_than_len(i32 %c) {
; CHECK-LABEL: @memchr_n_less_than_len(
; CHECK-NEXT: [[CALL:%.*]] = tail call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 [[C:%.*]], i64 15)
; CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[CALL]], null
; CHECK-NEXT: ret i1 [[CMP]]
;
%call = tail call ptr @memchr(ptr @.str, i32 %c, i64 15)
%cmp = icmp ne ptr %call, null
ret i1 %cmp
}
define zeroext i1 @memchr_n_more_than_len(i32 %c) {
; CHECK-LABEL: @memchr_n_more_than_len(
; CHECK-NEXT: [[CALL:%.*]] = tail call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 [[C:%.*]], i64 30)
; CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[CALL]], null
; CHECK-NEXT: ret i1 [[CMP]]
;
%call = tail call ptr @memchr(ptr @.str, i32 %c, i64 30)
%cmp = icmp ne ptr %call, null
ret i1 %cmp
}
; Negative test - no comparison with zero
define ptr @memchr_no_zero_cmp(i32 %c) {
; CHECK-LABEL: @memchr_no_zero_cmp(
; CHECK-NEXT: [[MEMCHR:%.*]] = tail call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 [[C:%.*]], i64 27)
; CHECK-NEXT: ret ptr [[MEMCHR]]
;
%call = tail call ptr @strchr(ptr nonnull dereferenceable(27) @.str, i32 %c)
ret ptr %call
}
define ptr @memchr_no_zero_cmp2(i32 %c) {
; CHECK-LABEL: @memchr_no_zero_cmp2(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[C:%.*]] to i8
; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i8 [[TMP1]], 10
; CHECK-NEXT: [[MEMCHR_SEL1:%.*]] = select i1 [[TMP2]], ptr getelementptr inbounds ([2 x i8], ptr @.str.1, i64 0, i64 1), ptr null
; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i8 [[TMP1]], 13
; CHECK-NEXT: [[MEMCHR_SEL2:%.*]] = select i1 [[TMP3]], ptr @.str.1, ptr [[MEMCHR_SEL1]]
; CHECK-NEXT: ret ptr [[MEMCHR_SEL2]]
;
%call = tail call ptr @strchr(ptr nonnull dereferenceable(3) @.str.1, i32 %c)
ret ptr %call
}
; Negative test - opt for size
define zeroext i1 @memchr_n_equals_len_minsize(i32 %c) minsize {
; CHECK-LABEL: @memchr_n_equals_len_minsize(
; CHECK-NEXT: [[MEMCHR:%.*]] = tail call ptr @memchr(ptr noundef nonnull dereferenceable(1) @.str, i32 [[C:%.*]], i64 27)
; CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[MEMCHR]], null
; CHECK-NEXT: ret i1 [[CMP]]
;
%call = tail call ptr @strchr(ptr nonnull dereferenceable(27) @.str, i32 %c)
%cmp = icmp ne ptr %call, null
ret i1 %cmp
}
define zeroext i1 @memchr_n_equals_len2_minsize(i32 %c) minsize {
; CHECK-LABEL: @memchr_n_equals_len2_minsize(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[C:%.*]] to i8
; CHECK-NEXT: [[TMP2:%.*]] = icmp ne i8 [[TMP1]], 10
; CHECK-NEXT: [[TMP3:%.*]] = icmp ne i8 [[TMP1]], 13
; CHECK-NEXT: [[CMP:%.*]] = and i1 [[TMP3]], [[TMP2]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%call = tail call ptr @memchr(ptr nonnull dereferenceable(3) @.str.1, i32 %c, i64 2)
%cmp = icmp eq ptr %call, null
ret i1 %cmp
}
|
