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
106
107
108
109
110
111
112
113
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -mergeicmps -mtriple=x86_64-unknown-unknown -S | FileCheck %s --check-prefix=X86
%"struct.std::pair" = type { i32, i32, i32, i32 }
declare void @foo(...) nounwind readnone
; We can split %entry and create a memcmp(16 bytes).
define zeroext i1 @opeq1(
; X86-LABEL: @opeq1(
;
; Make sure this call is moved to the beginning of the entry block.
; X86: entry:
; X86-NEXT: call void (...) @foo()
; X86-NEXT: [[THIRD_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[A:%.*]], i64 0, i32 0
; X86-NEXT: [[THIRD1_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[B:%.*]], i64 0, i32 0
; X86-NEXT: [[CSTR:%.*]] = bitcast i32* [[THIRD_I]] to i8*
; X86-NEXT: [[CSTR1:%.*]] = bitcast i32* [[THIRD1_I]] to i8*
; X86-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 16)
; X86-NEXT: [[TMP0:%.*]] = icmp eq i32 [[MEMCMP]], 0
; X86-NEXT: br label [[OPEQ1_EXIT:%.*]]
;
%"struct.std::pair"* nocapture readonly dereferenceable(16) %a,
%"struct.std::pair"* nocapture readonly dereferenceable(16) %b) local_unnamed_addr #0 {
entry:
%first.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 0
%0 = load i32, i32* %first.i, align 4
%first1.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 0
%1 = load i32, i32* %first1.i, align 4
; Does other work.
call void (...) @foo()
%cmp.i = icmp eq i32 %0, %1
br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
land.rhs.i:
%second.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 1
%2 = load i32, i32* %second.i, align 4
%second2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 1
%3 = load i32, i32* %second2.i, align 4
%cmp2.i = icmp eq i32 %2, %3
br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit
land.rhs.i.2:
%third.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 2
%4 = load i32, i32* %third.i, align 4
%third2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 2
%5 = load i32, i32* %third2.i, align 4
%cmp3.i = icmp eq i32 %4, %5
br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit
land.rhs.i.3:
%fourth.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 3
%6 = load i32, i32* %fourth.i, align 4
%fourth2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 3
%7 = load i32, i32* %fourth2.i, align 4
%cmp4.i = icmp eq i32 %6, %7
br label %opeq1.exit
opeq1.exit:
%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ]
ret i1 %8
}
; We will not be able to merge anything, make sure the call is not moved out.
define zeroext i1 @opeq1_discontiguous(
; X86-LABEL: @opeq1_discontiguous(
;
; Make sure this call is moved in the entry block.
; X86: entry:
; X86: [[FIRST_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[A:%.*]], i64 0, i32 1
; X86: [[FIRST1_I:%.*]] = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* [[B:%.*]], i64 0, i32 0
; X86: call void (...) @foo()
%"struct.std::pair"* nocapture readonly dereferenceable(16) %a,
%"struct.std::pair"* nocapture readonly dereferenceable(16) %b) local_unnamed_addr #0 {
entry:
%first.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 1
%0 = load i32, i32* %first.i, align 4
%first1.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 0
%1 = load i32, i32* %first1.i, align 4
; Does other work.
call void (...) @foo()
%cmp.i = icmp eq i32 %0, %1
br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
land.rhs.i:
%second.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 2
%2 = load i32, i32* %second.i, align 4
%second2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 1
%3 = load i32, i32* %second2.i, align 4
%cmp2.i = icmp eq i32 %2, %3
br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit
land.rhs.i.2:
%third.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 2
%4 = load i32, i32* %third.i, align 4
%third2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 3
%5 = load i32, i32* %third2.i, align 4
%cmp3.i = icmp eq i32 %4, %5
br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit
land.rhs.i.3:
%fourth.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %a, i64 0, i32 1
%6 = load i32, i32* %fourth.i, align 4
%fourth2.i = getelementptr inbounds %"struct.std::pair", %"struct.std::pair"* %b, i64 0, i32 3
%7 = load i32, i32* %fourth2.i, align 4
%cmp4.i = icmp eq i32 %6, %7
br label %opeq1.exit
opeq1.exit:
%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ]
ret i1 %8
}
|
