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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
; RUN: llc < %s -O1 -mtriple thumbv7-apple-ios6 | FileCheck %s
; Just make sure no one tries to make the assumption that the normal edge of an
; invoke is never a critical edge. Previously, this code would assert.
%struct.__CFString = type opaque
declare void @bar(ptr, ptr)
define noalias ptr @foo(ptr nocapture %inRefURL) noreturn ssp personality ptr @__gxx_personality_sj0 {
entry:
%call = tail call ptr @bar3()
%call2 = invoke ptr @bar2()
to label %for.cond unwind label %lpad
for.cond: ; preds = %entry, %for.cond
invoke void @bar(ptr undef, ptr null)
to label %for.cond unwind label %lpad5
lpad: ; preds = %entry
%0 = landingpad { ptr, i32 }
cleanup
%1 = extractvalue { ptr, i32 } %0, 0
%2 = extractvalue { ptr, i32 } %0, 1
br label %ehcleanup
lpad5: ; preds = %for.cond
%3 = landingpad { ptr, i32 }
cleanup
%4 = extractvalue { ptr, i32 } %3, 0
%5 = extractvalue { ptr, i32 } %3, 1
invoke void @release(ptr %call2)
to label %ehcleanup unwind label %terminate.lpad.i.i16
terminate.lpad.i.i16: ; preds = %lpad5
%6 = landingpad { ptr, i32 }
catch ptr null
tail call void @terminatev() noreturn nounwind
unreachable
ehcleanup: ; preds = %lpad5, %lpad
%exn.slot.0 = phi ptr [ %1, %lpad ], [ %4, %lpad5 ]
%ehselector.slot.0 = phi i32 [ %2, %lpad ], [ %5, %lpad5 ]
invoke void @release(ptr %call)
to label %_ZN5SmartIPK10__CFStringED1Ev.exit unwind label %terminate.lpad.i.i
terminate.lpad.i.i: ; preds = %ehcleanup
%7 = landingpad { ptr, i32 }
catch ptr null
tail call void @terminatev() noreturn nounwind
unreachable
_ZN5SmartIPK10__CFStringED1Ev.exit: ; preds = %ehcleanup
%lpad.val = insertvalue { ptr, i32 } undef, ptr %exn.slot.0, 0
%lpad.val12 = insertvalue { ptr, i32 } %lpad.val, i32 %ehselector.slot.0, 1
resume { ptr, i32 } %lpad.val12
}
declare ptr @bar3()
declare ptr @bar2()
declare i32 @__gxx_personality_sj0(...)
declare void @release(ptr)
declare void @terminatev()
; Make sure that the instruction DemoteRegToStack inserts to reload
; %call.i.i.i14.i.i follows the instruction that saves the value to the stack in
; basic block %entry.do.body.i.i.i_crit_edge.
; Previously, DemoteRegToStack would insert a load instruction into the entry
; block to reload %call.i.i.i14.i.i before the phi instruction (%0) in block
; %do.body.i.i.i.
; CHECK-LABEL: __Z4foo1c:
; CHECK: bl __Znwm
; CHECK: {{.*}}@ %do.body.i.i.i.preheader
; CHECK: str r0, [sp, [[OFFSET:#[0-9]+]]]
; CHECK: {{.*}}@ %do.body.i.i.i
; CHECK: ldr [[R0:r[0-9]+]], [sp, [[OFFSET]]]
; CHECK: cbz [[R0]]
%"class.std::__1::basic_string" = type { %"class.std::__1::__compressed_pair" }
%"class.std::__1::__compressed_pair" = type { %"class.std::__1::__libcpp_compressed_pair_imp" }
%"class.std::__1::__libcpp_compressed_pair_imp" = type { %"struct.std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__rep" }
%"struct.std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__rep" = type { %union.anon }
%union.anon = type { %"struct.std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__long" }
%"struct.std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__long" = type { i32, i32, ptr }
@.str = private unnamed_addr constant [12 x i8] c"some_string\00", align 1
define void @_Z4foo1c(i8 signext %a) personality ptr @__gxx_personality_sj0 {
entry:
%s1 = alloca %"class.std::__1::basic_string", align 4
call void @_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEPKcm(ptr %s1, ptr @.str, i32 11)
%call.i.i.i14.i.i = invoke noalias ptr @_Znwm(i32 1024)
to label %do.body.i.i.i unwind label %lpad.body
do.body.i.i.i: ; preds = %entry, %_ZNSt3__116allocator_traitsINS_9allocatorIcEEE9constructIccEEvRS2_PT_RKT0_.exit.i.i.i
%lsr.iv = phi i32 [ %lsr.iv.next, %_ZNSt3__116allocator_traitsINS_9allocatorIcEEE9constructIccEEvRS2_PT_RKT0_.exit.i.i.i ], [ -1024, %entry ]
%0 = phi ptr [ %incdec.ptr.i.i.i, %_ZNSt3__116allocator_traitsINS_9allocatorIcEEE9constructIccEEvRS2_PT_RKT0_.exit.i.i.i ], [ %call.i.i.i14.i.i, %entry ]
%new.isnull.i.i.i.i = icmp eq ptr %0, null
br i1 %new.isnull.i.i.i.i, label %_ZNSt3__116allocator_traitsINS_9allocatorIcEEE9constructIccEEvRS2_PT_RKT0_.exit.i.i.i, label %new.notnull.i.i.i.i
new.notnull.i.i.i.i: ; preds = %do.body.i.i.i
store i8 %a, ptr %0, align 1
br label %_ZNSt3__116allocator_traitsINS_9allocatorIcEEE9constructIccEEvRS2_PT_RKT0_.exit.i.i.i
_ZNSt3__116allocator_traitsINS_9allocatorIcEEE9constructIccEEvRS2_PT_RKT0_.exit.i.i.i: ; preds = %new.notnull.i.i.i.i, %do.body.i.i.i
%1 = phi ptr [ null, %do.body.i.i.i ], [ %0, %new.notnull.i.i.i.i ]
%incdec.ptr.i.i.i = getelementptr inbounds i8, ptr %1, i32 1
%lsr.iv.next = add i32 %lsr.iv, 1
%cmp.i16.i.i = icmp eq i32 %lsr.iv.next, 0
br i1 %cmp.i16.i.i, label %invoke.cont, label %do.body.i.i.i
invoke.cont: ; preds = %_ZNSt3__116allocator_traitsINS_9allocatorIcEEE9constructIccEEvRS2_PT_RKT0_.exit.i.i.i
invoke void @_Z4foo2Pci(ptr %call.i.i.i14.i.i, i32 1024)
to label %invoke.cont5 unwind label %lpad2
invoke.cont5: ; preds = %invoke.cont
%cmp.i.i.i15 = icmp eq ptr %call.i.i.i14.i.i, null
br i1 %cmp.i.i.i15, label %invoke.cont6, label %_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i19
_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i19: ; preds = %invoke.cont5
call void @_ZdlPv(ptr %call.i.i.i14.i.i)
br label %invoke.cont6
invoke.cont6: ; preds = %_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i19, %invoke.cont5
%call10 = call ptr @_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED1Ev(ptr %s1)
ret void
lpad.body: ; preds = %entry
%2 = landingpad { ptr, i32 }
cleanup
%3 = extractvalue { ptr, i32 } %2, 0
%4 = extractvalue { ptr, i32 } %2, 1
br label %ehcleanup
lpad2: ; preds = %invoke.cont
%5 = landingpad { ptr, i32 }
cleanup
%6 = extractvalue { ptr, i32 } %5, 0
%7 = extractvalue { ptr, i32 } %5, 1
%cmp.i.i.i21 = icmp eq ptr %call.i.i.i14.i.i, null
br i1 %cmp.i.i.i21, label %ehcleanup, label %_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i26
_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i26: ; preds = %lpad2
call void @_ZdlPv(ptr %call.i.i.i14.i.i)
br label %ehcleanup
ehcleanup: ; preds = %_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i26, %lpad2, %lpad.body
%exn.slot.0 = phi ptr [ %3, %lpad.body ], [ %6, %lpad2 ], [ %6, %_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i26 ]
%ehselector.slot.0 = phi i32 [ %4, %lpad.body ], [ %7, %lpad2 ], [ %7, %_ZNSt3__113__vector_baseIcNS_9allocatorIcEEE5clearEv.exit.i.i.i26 ]
%call12 = invoke ptr @_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED1Ev(ptr %s1)
to label %eh.resume unwind label %terminate.lpad
eh.resume: ; preds = %ehcleanup
%lpad.val = insertvalue { ptr, i32 } undef, ptr %exn.slot.0, 0
%lpad.val13 = insertvalue { ptr, i32 } %lpad.val, i32 %ehselector.slot.0, 1
resume { ptr, i32 } %lpad.val13
terminate.lpad: ; preds = %ehcleanup
%8 = landingpad { ptr, i32 }
catch ptr null
%9 = extractvalue { ptr, i32 } %8, 0
call void @__clang_call_terminate(ptr %9)
unreachable
}
declare void @_Z4foo2Pci(ptr, i32)
define linkonce_odr hidden void @__clang_call_terminate(ptr) {
%2 = tail call ptr @__cxa_begin_catch(ptr %0)
tail call void @_ZSt9terminatev()
unreachable
}
declare ptr @__cxa_begin_catch(ptr)
declare void @_ZSt9terminatev()
declare ptr @_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEED1Ev(ptr returned)
declare void @_ZdlPv(ptr) #3
declare noalias ptr @_Znwm(i32)
declare void @_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE6__initEPKcm(ptr, ptr, i32)
declare void @_Unwind_SjLj_Register(ptr)
declare void @_Unwind_SjLj_Unregister(ptr)
declare ptr @llvm.frameaddress(i32)
declare ptr @llvm.stacksave()
declare void @llvm.stackrestore(ptr)
declare i32 @llvm.eh.sjlj.setjmp(ptr)
declare ptr @llvm.eh.sjlj.lsda()
declare void @llvm.eh.sjlj.callsite(i32)
declare void @llvm.eh.sjlj.functioncontext(ptr)
|
