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
142
143
144
145
146
147
148
149
150
|
# REQUIRES: asserts
# RUN: llc -mtriple=x86_64-- -run-pass=greedy %s -debug-only=regalloc -huge-size-for-split=0 -o /dev/null 2>&1 | FileCheck %s
# Check no global region split is needed because the live range to split is trivially rematerializable.
# CHECK-NOT: Compact region bundles
--- |
; ModuleID = '<stdin>'
source_filename = "2.cc"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@m = local_unnamed_addr global i32 0, align 4
@.str = private unnamed_addr constant [4 x i8] c"abc\00", align 1
@.str.1 = private unnamed_addr constant [4 x i8] c"def\00", align 1
@.str.2 = private unnamed_addr constant [4 x i8] c"ghi\00", align 1
; Function Attrs: uwtable
define void @_Z3fooi(i32 %value) local_unnamed_addr #0 {
entry:
br label %do.body
do.body: ; preds = %do.cond, %entry
tail call void asm sideeffect "", "~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #2, !srcloc !3
switch i32 %value, label %do.cond [
i32 0, label %sw.bb
i32 1, label %sw.bb1
i32 2, label %sw.bb2
]
sw.bb: ; preds = %do.body
tail call void @_Z3gooPKc(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
br label %sw.bb1
sw.bb1: ; preds = %sw.bb, %do.body
tail call void @_Z3gooPKc(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
br label %sw.bb2
sw.bb2: ; preds = %sw.bb1, %do.body
tail call void @_Z3gooPKc(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
br label %do.cond
do.cond: ; preds = %sw.bb2, %do.body
%0 = load i32, i32* @m, align 4, !tbaa !4
%cmp = icmp eq i32 %0, 5
br i1 %cmp, label %do.end, label %do.body
do.end: ; preds = %do.cond
ret void
}
declare void @_Z3gooPKc(i8*) local_unnamed_addr #1
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #2
attributes #0 = { uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind }
!llvm.module.flags = !{!0, !1}
!llvm.ident = !{!2}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 7, !"PIC Level", i32 2}
!2 = !{!"clang version 7.0.0 (trunk 335057)"}
!3 = !{i32 80}
!4 = !{!5, !5, i64 0}
!5 = !{!"int", !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
...
---
name: _Z3fooi
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr32 }
- { id: 1, class: gr32 }
- { id: 2, class: gr32 }
- { id: 3, class: gr64 }
- { id: 4, class: gr64 }
- { id: 5, class: gr64 }
- { id: 6, class: gr64 }
- { id: 7, class: gr32 }
- { id: 8, class: gr32 }
liveins:
- { reg: '$edi', virtual-reg: '%0' }
frameInfo:
hasCalls: true
body: |
bb.0.entry:
liveins: $edi
%0:gr32 = COPY $edi
%5:gr64 = LEA64r $rip, 1, $noreg, @.str.2, $noreg
%6:gr64 = MOV64rm $rip, 1, $noreg, target-flags(x86-gotpcrel) @m, $noreg :: (load (s64) from got)
%4:gr64 = LEA64r $rip, 1, $noreg, @.str.1, $noreg
%3:gr64 = LEA64r $rip, 1, $noreg, @.str, $noreg
bb.1.do.body:
successors: %bb.6(0x20000000), %bb.2(0x60000000)
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15, 12, implicit-def dead early-clobber $eflags, !3
CMP32ri8 %0, 2, implicit-def $eflags
JCC_1 %bb.6, 4, implicit killed $eflags
JMP_1 %bb.2
bb.2.do.body:
successors: %bb.5(0x2aaaaaab), %bb.3(0x55555555)
CMP32ri8 %0, 1, implicit-def $eflags
JCC_1 %bb.5, 4, implicit killed $eflags
JMP_1 %bb.3
bb.3.do.body:
successors: %bb.4, %bb.7
TEST32rr %0, %0, implicit-def $eflags
JCC_1 %bb.7, 5, implicit killed $eflags
JMP_1 %bb.4
bb.4.sw.bb:
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
$rdi = COPY %3
CALL64pcrel32 target-flags(x86-plt) @_Z3gooPKc, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
bb.5.sw.bb1:
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
$rdi = COPY %4
CALL64pcrel32 target-flags(x86-plt) @_Z3gooPKc, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
bb.6.sw.bb2:
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
$rdi = COPY %5
CALL64pcrel32 target-flags(x86-plt) @_Z3gooPKc, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
bb.7.do.cond:
successors: %bb.8(0x04000000), %bb.1(0x7c000000)
CMP32mi8 %6, 1, $noreg, 0, $noreg, 5, implicit-def $eflags :: (dereferenceable load (s32) from @m, !tbaa !4)
JCC_1 %bb.1, 5, implicit killed $eflags
JMP_1 %bb.8
bb.8.do.end:
RET 0
...
|
