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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=newgvn -S | FileCheck %s
; REQUIRES: asserts
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-grtev4-linux-gnu"
define hidden void @barrier() align 2 {
; CHECK-LABEL: @barrier(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CALLG:%.*]] = tail call i64 @g()
; CHECK-NEXT: [[SEL:%.*]] = select i1 undef, i64 0, i64 [[CALLG]]
; CHECK-NEXT: [[LOADED:%.*]] = load i64, i64* null, align 8
; CHECK-NEXT: [[ADD:%.*]] = add i64 [[LOADED]], 1
; CHECK-NEXT: [[SHR17:%.*]] = lshr i64 [[ADD]], 1
; CHECK-NEXT: [[SUB:%.*]] = add nsw i64 [[SHR17]], -1
; CHECK-NEXT: br label [[FIRST:%.*]]
; CHECK: first:
; CHECK-NEXT: [[PHI_ONE:%.*]] = phi i64 [ [[SEL]], [[ENTRY:%.*]] ], [ 0, [[FIRST]] ], [ 0, [[THIRD:%.*]] ]
; CHECK-NEXT: [[CMP_PHI1_SUB:%.*]] = icmp eq i64 [[PHI_ONE]], [[SUB]]
; CHECK-NEXT: br i1 [[CMP_PHI1_SUB]], label [[SECOND:%.*]], label [[FIRST]]
; CHECK: second:
; CHECK-NEXT: br label [[THIRD]]
; CHECK: third:
; CHECK-NEXT: br i1 false, label [[SECOND]], label [[FIRST]]
;
entry:
%callg = tail call i64 @g()
%sel = select i1 undef, i64 0, i64 %callg
%loaded = load i64, i64* null, align 8
%add = add i64 %loaded, 1
%shr17 = lshr i64 %add, 1
%sub = add nsw i64 %shr17, -1
br label %first
first:
%phi_one = phi i64 [ %sel, %entry ], [ 0, %first ], [ 0, %third ]
%cmp_phi1_sub = icmp eq i64 %phi_one, %sub
br i1 %cmp_phi1_sub, label %second, label %first
second:
%phi_two = phi i64 [ %inc, %third ], [ %phi_one, %first ]
br label %third
third:
%inc = add i64 %phi_two, 1
%cmp_inc_sub = icmp eq i64 %inc, %sub
br i1 %cmp_inc_sub, label %second, label %first
}
define hidden void @barrier2() align 2 {
; CHECK-LABEL: @barrier2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i64, i64* null, align 8
; CHECK-NEXT: [[CALL9:%.*]] = tail call i64 @g()
; CHECK-NEXT: [[REM:%.*]] = select i1 undef, i64 0, i64 [[CALL9]]
; CHECK-NEXT: [[ADD:%.*]] = add i64 [[TMP0]], 1
; CHECK-NEXT: [[SHR17:%.*]] = lshr i64 [[ADD]], 1
; CHECK-NEXT: [[SUB:%.*]] = add nsw i64 [[SHR17]], -1
; CHECK-NEXT: br label [[MAINLOOP:%.*]]
; CHECK: second.exit:
; CHECK-NEXT: br label [[FIRST_EXIT:%.*]]
; CHECK: first.exit:
; CHECK-NEXT: br label [[MAINLOOP]]
; CHECK: mainloop:
; CHECK-NEXT: [[FIRSTPHI:%.*]] = phi i64 [ [[REM]], [[ENTRY:%.*]] ], [ 0, [[FIRST_EXIT]] ]
; CHECK-NEXT: [[FIRSTCMP:%.*]] = icmp eq i64 [[FIRSTPHI]], [[SUB]]
; CHECK-NEXT: br i1 [[FIRSTCMP]], label [[SECOND_PREHEADER:%.*]], label [[FIRST_EXIT]]
; CHECK: second.preheader:
; CHECK-NEXT: br label [[INNERLOOP:%.*]]
; CHECK: innerloop:
; CHECK-NEXT: br label [[CLEANUP:%.*]]
; CHECK: cleanup:
; CHECK-NEXT: br i1 false, label [[INNERLOOP]], label [[SECOND_EXIT:%.*]]
;
entry:
%0 = load i64, i64* null, align 8
%call9 = tail call i64 @g()
%rem = select i1 undef, i64 0, i64 %call9
%add = add i64 %0, 1
%shr17 = lshr i64 %add, 1
%sub = add nsw i64 %shr17, -1
br label %mainloop
second.exit: ; preds = %cleanup
br label %first.exit
first.exit: ; preds = %mainloop, %second.exit
br label %mainloop
mainloop: ; preds = %first.exit, %entry
%firstphi = phi i64 [ %rem, %entry ], [ 0, %first.exit ]
%firstcmp = icmp eq i64 %firstphi, %sub
br i1 %firstcmp, label %second.preheader, label %first.exit
second.preheader: ; preds = %mainloop
br label %innerloop
innerloop: ; preds = %cleanup, %second.preheader
%secondphi = phi i64 [ %inc, %cleanup ], [ %firstphi, %second.preheader ]
br label %cleanup
cleanup: ; preds = %innerloop
%inc = add i64 %secondphi, 1
%secondcmp = icmp eq i64 %inc, %sub
br i1 %secondcmp, label %innerloop, label %second.exit
}
declare hidden i64 @g() local_unnamed_addr align 2
define void @barrier3(i64 %arg) {
; CHECK-LABEL: @barrier3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FIRSTLOOP:%.*]]
; CHECK: firstloop:
; CHECK-NEXT: [[PHI1:%.*]] = phi i64 [ [[ARG:%.*]], [[ENTRY:%.*]] ], [ 0, [[FIRSTLOOP]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i64 [[PHI1]], -1
; CHECK-NEXT: br i1 [[CMP1]], label [[SECONDLOOP:%.*]], label [[FIRSTLOOP]]
; CHECK: secondloop:
; CHECK-NEXT: call void @llvm.assume(i1 false)
; CHECK-NEXT: br label [[SECONDLOOP]]
;
entry:
br label %firstloop
firstloop:
%phi1 = phi i64 [ %arg, %entry ], [ 0, %firstloop ]
%cmp1 = icmp eq i64 %phi1, -1
br i1 %cmp1, label %secondloop, label %firstloop
secondloop:
%phi2 = phi i64 [ %inc, %secondloop ], [ %phi1, %firstloop ]
%inc = add i64 %phi2, 1
%cmp2 = icmp eq i64 %inc, -1
call void @llvm.assume(i1 %cmp2)
br label %secondloop
}
declare void @llvm.assume(i1)
|
