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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -gvn -gvn-max-block-speculations=1 -S | FileCheck -check-prefix=PRE %s
; RUN: opt < %s -gvn -gvn-max-block-speculations=0 -S | FileCheck -check-prefix=CHECK %s
define i32 @loadpre_opportunity(i32** %arg, i1 %arg1, i1 %arg2, i1 %arg3) {
; PRE-LABEL: @loadpre_opportunity(
; PRE-NEXT: bb:
; PRE-NEXT: [[I:%.*]] = load i32*, i32** [[ARG:%.*]], align 8
; PRE-NEXT: [[I6:%.*]] = call i32 @use(i32* [[I]])
; PRE-NEXT: br label [[BB11:%.*]]
; PRE: bb7:
; PRE-NEXT: [[I8:%.*]] = phi i32* [ [[I8_PRE:%.*]], [[BB17_BB7_CRIT_EDGE:%.*]] ], [ [[I81:%.*]], [[BB11]] ]
; PRE-NEXT: [[I10:%.*]] = call i32 @use(i32* [[I8]])
; PRE-NEXT: br label [[BB11]]
; PRE: bb11:
; PRE-NEXT: [[I81]] = phi i32* [ [[I]], [[BB:%.*]] ], [ [[I8]], [[BB7:%.*]] ]
; PRE-NEXT: [[I12:%.*]] = phi i32 [ [[I6]], [[BB]] ], [ [[I10]], [[BB7]] ]
; PRE-NEXT: br i1 [[ARG1:%.*]], label [[BB7]], label [[BB13:%.*]]
; PRE: bb13:
; PRE-NEXT: call void @somecall()
; PRE-NEXT: br i1 [[ARG2:%.*]], label [[BB14:%.*]], label [[BB17:%.*]]
; PRE: bb14:
; PRE-NEXT: br label [[BB15:%.*]]
; PRE: bb15:
; PRE-NEXT: br i1 [[ARG3:%.*]], label [[BB16:%.*]], label [[BB15]]
; PRE: bb16:
; PRE-NEXT: br label [[BB17]]
; PRE: bb17:
; PRE-NEXT: [[I18:%.*]] = call i1 @cond()
; PRE-NEXT: br i1 [[I18]], label [[BB17_BB7_CRIT_EDGE]], label [[BB19:%.*]]
; PRE: bb17.bb7_crit_edge:
; PRE-NEXT: [[I8_PRE]] = load i32*, i32** [[ARG]], align 8
; PRE-NEXT: br label [[BB7]]
; PRE: bb19:
; PRE-NEXT: ret i32 [[I12]]
;
; CHECK-LABEL: @loadpre_opportunity(
; CHECK-NEXT: bb:
; CHECK-NEXT: [[I:%.*]] = load i32*, i32** [[ARG:%.*]], align 8
; CHECK-NEXT: [[I6:%.*]] = call i32 @use(i32* [[I]])
; CHECK-NEXT: br label [[BB11:%.*]]
; CHECK: bb7:
; CHECK-NEXT: [[I8:%.*]] = load i32*, i32** [[ARG]], align 8
; CHECK-NEXT: [[I10:%.*]] = call i32 @use(i32* [[I8]])
; CHECK-NEXT: br label [[BB11]]
; CHECK: bb11:
; CHECK-NEXT: [[I12:%.*]] = phi i32 [ [[I6]], [[BB:%.*]] ], [ [[I10]], [[BB7:%.*]] ]
; CHECK-NEXT: br i1 [[ARG1:%.*]], label [[BB7]], label [[BB13:%.*]]
; CHECK: bb13:
; CHECK-NEXT: call void @somecall()
; CHECK-NEXT: br i1 [[ARG2:%.*]], label [[BB14:%.*]], label [[BB17:%.*]]
; CHECK: bb14:
; CHECK-NEXT: br label [[BB15:%.*]]
; CHECK: bb15:
; CHECK-NEXT: br i1 [[ARG3:%.*]], label [[BB16:%.*]], label [[BB15]]
; CHECK: bb16:
; CHECK-NEXT: br label [[BB17]]
; CHECK: bb17:
; CHECK-NEXT: [[I18:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[I18]], label [[BB7]], label [[BB19:%.*]]
; CHECK: bb19:
; CHECK-NEXT: ret i32 [[I12]]
;
bb:
%i = load i32*, i32** %arg, align 8
%i4 = getelementptr inbounds i32, i32* %i, i64 0
br label %bb5
bb5:
%i6 = call i32 @use(i32* %i4)
br label %bb11
bb7:
%i8 = load i32*, i32** %arg, align 8
%i9 = getelementptr inbounds i32, i32* %i8, i64 0
%i10 = call i32 @use(i32* %i9)
br label %bb11
bb11:
%i12 = phi i32 [ %i6, %bb5 ], [ %i10, %bb7 ]
br i1 %arg1, label %bb7, label %bb13
bb13:
call void @somecall()
br i1 %arg2, label %bb14, label %bb17
bb14:
br label %bb15
bb15:
br i1 %arg3, label %bb16, label %bb15
bb16:
br label %bb17
bb17:
%i18 = call i1 @cond()
br i1 %i18, label %bb7, label %bb19
bb19:
ret i32 %i12
}
declare void @somecall()
declare i32 @use(i32*) readnone
declare i1 @cond() readnone
|
