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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
# RUN: not --crash llc -run-pass=none -verify-machineinstrs %s -o /dev/null 2>&1 \
# RUN: | FileCheck %s
# REQUIRES: powerpc-registered-target
# Test for a case we observed after the initial implementation of D129997
# landed, in which case we observed a crash while building the ppc64le Linux
# kernel. In that case, we had one block with two exits, both to the same
# successor. Removing one of the exits corrupted the successor/predecessor
# lists.
# CHECK: *** Bad machine code: INLINEASM_BR indirect target missing from successor list ***
# CHECK-NEXT: - function: ceph_con_v2_try_read
# CHECK-NEXT: - basic block: %bb.3 if.else.i.i
# CHECK-NEXT: - instruction: INLINEASM_BR &"" [sideeffect] [attdialect], $0:[imm], %bb.5
# CHECK-NEXT: - operand 3: %bb.5
# CHECK: *** Bad machine code: INLINEASM_BR indirect target predecessor list missing parent ***
# CHECK-NEXT: - function: ceph_con_v2_try_read
# CHECK-NEXT: - basic block: %bb.3 if.else.i.i
# CHECK-NEXT: - instruction: INLINEASM_BR &"" [sideeffect] [attdialect], $0:[imm], %bb.5
# CHECK-NEXT: - operand 3: %bb.5
--- |
target datalayout = "e-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512"
target triple = "powerpc64le-unknown-linux-gnu"
; Function Attrs: argmemonly nocallback nofree nosync nounwind willreturn
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0
define void @ceph_con_v2_try_read(i32 %__trans_tmp_3.sroa.0.0.copyload, i1 %tobool.not.i.i) {
entry:
%skip.i.i = alloca i32, i32 0, align 4
%cond = icmp eq i32 %__trans_tmp_3.sroa.0.0.copyload, 0
br label %for.cond
for.cond: ; preds = %for.cond, %process_message_header.exit.i, %if.end.i, %entry
br i1 %cond, label %sw.bb, label %for.cond
sw.bb: ; preds = %for.cond
%call.i.i2 = call i32 null(ptr %skip.i.i)
br i1 %tobool.not.i.i, label %if.else.i.i, label %process_message_header.exit.i
if.else.i.i: ; preds = %sw.bb
callbr void asm sideeffect "", "!i"()
to label %if.end.i [label %if.end.i]
process_message_header.exit.i: ; preds = %sw.bb
call void @llvm.lifetime.end.p0(i64 0, ptr %skip.i.i)
br label %for.cond
if.end.i: ; preds = %if.else.i.i, %if.else.i.i
call void @llvm.lifetime.end.p0(i64 0, ptr %skip.i.i)
br label %for.cond
}
attributes #0 = { argmemonly nocallback nofree nosync nounwind willreturn }
...
---
name: ceph_con_v2_try_read
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
callsEHReturn: false
callsUnwindInit: false
hasEHContTarget: false
hasEHScopes: false
hasEHFunclets: false
failsVerification: false
tracksDebugUserValues: false
registers:
- { id: 0, class: crbitrc, preferred-register: '' }
- { id: 1, class: g8rc, preferred-register: '' }
- { id: 2, class: g8rc, preferred-register: '' }
- { id: 3, class: crbitrc, preferred-register: '' }
- { id: 4, class: gprc, preferred-register: '' }
- { id: 5, class: crrc, preferred-register: '' }
- { id: 6, class: g8rc, preferred-register: '' }
- { id: 7, class: g8rc, preferred-register: '' }
- { id: 8, class: g8rc, preferred-register: '' }
- { id: 9, class: g8rc, preferred-register: '' }
- { id: 10, class: g8rc, preferred-register: '' }
liveins:
- { reg: '$x3', virtual-reg: '%1' }
- { reg: '$x4', virtual-reg: '%2' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: false
hasCalls: true
stackProtector: ''
functionContext: ''
maxCallFrameSize: 4294967295
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
localFrameSize: 0
savePoint: []
restorePoint: []
fixedStack: []
stack:
- { id: 0, name: skip.i.i, type: default, offset: 0, size: 1, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.1(0x80000000)
liveins: $x3, $x4
%2:g8rc = COPY $x4
%1:g8rc = COPY $x3
%10:g8rc = ANDI8_rec %2, 1, implicit-def $cr0
%3:crbitrc = COPY $cr0gt
%4:gprc = COPY %1.sub_32
%5:crrc = CMPWI killed %4, 0
%0:crbitrc = COPY %5.sub_eq
bb.1.for.cond:
successors: %bb.2(0x30000000), %bb.1(0x50000000)
BCn %0, %bb.1
B %bb.2
bb.2.sw.bb:
successors: %bb.3(0x40000000), %bb.4(0x40000000)
ADJCALLSTACKDOWN 32, 0, implicit-def dead $r1, implicit $r1
%6:g8rc = COPY $x2
STD %6, 24, $x1 :: (store (s64) into stack + 24)
%7:g8rc = ADDI8 %stack.0.skip.i.i, 0
%8:g8rc = LI8 0
$x3 = COPY %7
$x12 = COPY %8
MTCTR8 %8, implicit-def $ctr8
BCTRL8_LDinto_toc 24, $x1, csr_ppc64_altivec, implicit-def dead $lr8, implicit-def dead $x2, implicit $ctr8, implicit $rm, implicit $x3, implicit $x12, implicit $x2, implicit-def $r1, implicit-def $x3
ADJCALLSTACKUP 32, 0, implicit-def dead $r1, implicit $r1
%9:g8rc = COPY $x3
BCn %3, %bb.4
B %bb.3
; Oops, should have %bb.5 in the successor list!
bb.3.if.else.i.i:
successors: %bb.1(0x80000000)
INLINEASM_BR &"", 1 /* sideeffect attdialect */, 13 /* imm */, %bb.5
LIFETIME_END %stack.0.skip.i.i
B %bb.1
bb.4.process_message_header.exit.i:
successors: %bb.1(0x80000000)
LIFETIME_END %stack.0.skip.i.i
B %bb.1
; Oops, should have %bb.3 in the predecessor list!
bb.5.if.end.i (machine-block-address-taken, inlineasm-br-indirect-target):
successors: %bb.1(0x80000000)
LIFETIME_END %stack.0.skip.i.i
B %bb.1
...
|
