File: cfi-thunk-merging.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (210 lines) | stat: -rw-r--r-- 9,780 bytes parent folder | download | duplicates (5)
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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs --version 2
;; Check the cases involving internal CFI instrumented functions where we do not expect functions to be merged.
; RUN: opt -S -passes=mergefunc < %s | FileCheck %s
; RUN: opt -S -passes=mergefunc,lowertypetests < %s | FileCheck --check-prefix=LOWERTYPETESTS %s

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-unknown-linux"

@0 = private unnamed_addr constant { i16, i16, [12 x i8] } { i16 -1, i16 0, [12 x i8] c"'int (int)'\00" }

; Function Attrs: noinline nounwind optnone
define dso_local i32 @f(i32 noundef %arg) #0 !type !3 !type !4 {
entry:
  %arg.addr = alloca i32, align 4
  %a = alloca i32, align 4
  %b = alloca i32, align 4
  store i32 %arg, ptr %arg.addr, align 4
  store i32 0, ptr %b, align 4
  %0 = load i32, ptr %arg.addr, align 4
  %cmp = icmp sgt i32 %0, 0
  br i1 %cmp, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  store i32 1, ptr %a, align 4
  br label %if.end

if.end:                                           ; preds = %if.then, %entry
  %1 = load i32, ptr %a, align 4
  %2 = load i32, ptr %b, align 4
  %add = add nsw i32 %1, %2
  ret i32 %add
}

; Function Attrs: noinline nounwind optnone
define dso_local i32 @f_thunk(i32 noundef %arg) #0 !type !3 !type !4 {
entry:
  %arg.addr = alloca i32, align 4
  %a = alloca i32, align 4
  %b = alloca i32, align 4
  store i32 %arg, ptr %arg.addr, align 4
  store i32 0, ptr %b, align 4
  %0 = load i32, ptr %arg.addr, align 4
  %cmp = icmp sgt i32 %0, 0
  br i1 %cmp, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  store i32 1, ptr %a, align 4
  br label %if.end

if.end:                                           ; preds = %if.then, %entry
  %1 = load i32, ptr %a, align 4
  %2 = load i32, ptr %b, align 4
  %add = add nsw i32 %1, %2
  ret i32 %add
}

; Function Attrs: noinline nounwind optnone
define dso_local i32 @g(i32 noundef %b) #0 !type !3 !type !4 {
entry:
  %b.addr = alloca i32, align 4
  %fp = alloca ptr, align 8
  store i32 %b, ptr %b.addr, align 4
  %0 = load i32, ptr %b.addr, align 4
  %tobool = icmp ne i32 %0, 0
  %1 = zext i1 %tobool to i64
  %cond = select i1 %tobool, ptr @f, ptr @f_thunk
  store ptr %cond, ptr %fp, align 8
  %2 = load ptr, ptr %fp, align 8
  %3 = call i1 @llvm.type.test(ptr %2, metadata !"_ZTSFiiE"), !nosanitize !5
  br i1 %3, label %cont, label %trap, !nosanitize !5

trap:                                             ; preds = %entry
  call void @llvm.ubsantrap(i8 2) #3, !nosanitize !5
  unreachable, !nosanitize !5

cont:                                             ; preds = %entry
  %4 = load i32, ptr %b.addr, align 4
  %call = call i32 %2(i32 noundef %4)
  ret i32 %call
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i1 @llvm.type.test(ptr, metadata) #1

; Function Attrs: cold noreturn nounwind
declare void @llvm.ubsantrap(i8 immarg) #2

attributes #0 = { noinline nounwind optnone "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { cold noreturn nounwind }
attributes #3 = { noreturn nounwind }

!llvm.module.flags = !{!0, !1}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 4, !"CFI Canonical Jump Tables", i32 0}
!3 = !{i64 0, !"_ZTSFiiE"}
!4 = !{i64 0, !"_ZTSFiiE.generalized"}
!5 = !{}
; CHECK-LABEL: define dso_local i32 @f
; CHECK-SAME: (i32 noundef [[ARG:%.*]]) #[[ATTR0:[0-9]+]] !type [[META2:![0-9]+]] !type [[META3:![0-9]+]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ARG_ADDR:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[B:%.*]] = alloca i32, align 4
; CHECK-NEXT:    store i32 [[ARG]], ptr [[ARG_ADDR]], align 4
; CHECK-NEXT:    store i32 0, ptr [[B]], align 4
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARG_ADDR]], align 4
; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i32 [[TMP0]], 0
; CHECK-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    store i32 1, ptr [[A]], align 4
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP1:%.*]] = load i32, ptr [[A]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr [[B]], align 4
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP2]]
; CHECK-NEXT:    ret i32 [[ADD]]
;
;
; CHECK-LABEL: define dso_local i32 @g
; CHECK-SAME: (i32 noundef [[B:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[B_ADDR:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[FP:%.*]] = alloca ptr, align 8
; CHECK-NEXT:    store i32 [[B]], ptr [[B_ADDR]], align 4
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[B_ADDR]], align 4
; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp ne i32 [[TMP0]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = zext i1 [[TOBOOL]] to i64
; CHECK-NEXT:    [[COND:%.*]] = select i1 [[TOBOOL]], ptr @f, ptr @f_thunk
; CHECK-NEXT:    store ptr [[COND]], ptr [[FP]], align 8
; CHECK-NEXT:    [[TMP2:%.*]] = load ptr, ptr [[FP]], align 8
; CHECK-NEXT:    [[TMP3:%.*]] = call i1 @llvm.type.test(ptr [[TMP2]], metadata !"_ZTSFiiE"), !nosanitize [[META4:![0-9]+]]
; CHECK-NEXT:    br i1 [[TMP3]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META4]]
; CHECK:       trap:
; CHECK-NEXT:    call void @llvm.ubsantrap(i8 2) #[[ATTR3:[0-9]+]], !nosanitize [[META4]]
; CHECK-NEXT:    unreachable, !nosanitize [[META4]]
; CHECK:       cont:
; CHECK-NEXT:    [[TMP4:%.*]] = load i32, ptr [[B_ADDR]], align 4
; CHECK-NEXT:    [[CALL:%.*]] = call i32 [[TMP2]](i32 noundef [[TMP4]])
; CHECK-NEXT:    ret i32 [[CALL]]
;
;
; CHECK-LABEL: define dso_local i32 @f_thunk
; CHECK-SAME: (i32 noundef [[TMP0:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; CHECK-NEXT:    [[TMP2:%.*]] = tail call i32 @f(i32 noundef [[TMP0]]) #[[ATTR0]]
; CHECK-NEXT:    ret i32 [[TMP2]]
;
;
; LOWERTYPETESTS-LABEL: define dso_local i32 @f
; LOWERTYPETESTS-SAME: (i32 noundef [[ARG:%.*]]) #[[ATTR0:[0-9]+]] !type [[META2:![0-9]+]] !type [[META3:![0-9]+]] {
; LOWERTYPETESTS-NEXT:  entry:
; LOWERTYPETESTS-NEXT:    [[ARG_ADDR:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    [[A:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    [[B:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    store i32 [[ARG]], ptr [[ARG_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    store i32 0, ptr [[B]], align 4
; LOWERTYPETESTS-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARG_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[CMP:%.*]] = icmp sgt i32 [[TMP0]], 0
; LOWERTYPETESTS-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; LOWERTYPETESTS:       if.then:
; LOWERTYPETESTS-NEXT:    store i32 1, ptr [[A]], align 4
; LOWERTYPETESTS-NEXT:    br label [[IF_END]]
; LOWERTYPETESTS:       if.end:
; LOWERTYPETESTS-NEXT:    [[TMP1:%.*]] = load i32, ptr [[A]], align 4
; LOWERTYPETESTS-NEXT:    [[TMP2:%.*]] = load i32, ptr [[B]], align 4
; LOWERTYPETESTS-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP2]]
; LOWERTYPETESTS-NEXT:    ret i32 [[ADD]]
;
;
; LOWERTYPETESTS-LABEL: define dso_local i32 @g
; LOWERTYPETESTS-SAME: (i32 noundef [[B:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; LOWERTYPETESTS-NEXT:  entry:
; LOWERTYPETESTS-NEXT:    [[B_ADDR:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    [[FP:%.*]] = alloca ptr, align 8
; LOWERTYPETESTS-NEXT:    store i32 [[B]], ptr [[B_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[TMP0:%.*]] = load i32, ptr [[B_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[TOBOOL:%.*]] = icmp ne i32 [[TMP0]], 0
; LOWERTYPETESTS-NEXT:    [[TMP1:%.*]] = zext i1 [[TOBOOL]] to i64
; LOWERTYPETESTS-NEXT:    [[COND:%.*]] = select i1 [[TOBOOL]], ptr @.cfi.jumptable, ptr getelementptr inbounds ([2 x [8 x i8]], ptr @.cfi.jumptable, i64 0, i64 1)
; LOWERTYPETESTS-NEXT:    store ptr [[COND]], ptr [[FP]], align 8
; LOWERTYPETESTS-NEXT:    [[TMP2:%.*]] = load ptr, ptr [[FP]], align 8
; LOWERTYPETESTS-NEXT:    [[TMP3:%.*]] = ptrtoint ptr [[TMP2]] to i64
; LOWERTYPETESTS-NEXT:    [[TMP4:%.*]] = sub i64 [[TMP3]], ptrtoint (ptr @.cfi.jumptable to i64)
; LOWERTYPETESTS-NEXT:    [[TMP5:%.*]] = lshr i64 [[TMP4]], 3
; LOWERTYPETESTS-NEXT:    [[TMP6:%.*]] = shl i64 [[TMP4]], 61
; LOWERTYPETESTS-NEXT:    [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]]
; LOWERTYPETESTS-NEXT:    [[TMP8:%.*]] = icmp ule i64 [[TMP7]], 1
; LOWERTYPETESTS-NEXT:    br i1 [[TMP8]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META4:![0-9]+]]
; LOWERTYPETESTS:       trap:
; LOWERTYPETESTS-NEXT:    call void @llvm.ubsantrap(i8 2) #[[ATTR4:[0-9]+]], !nosanitize [[META4]]
; LOWERTYPETESTS-NEXT:    unreachable, !nosanitize [[META4]]
; LOWERTYPETESTS:       cont:
; LOWERTYPETESTS-NEXT:    [[TMP9:%.*]] = load i32, ptr [[B_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[CALL:%.*]] = call i32 [[TMP2]](i32 noundef [[TMP9]])
; LOWERTYPETESTS-NEXT:    ret i32 [[CALL]]
;
;
; LOWERTYPETESTS-LABEL: define dso_local i32 @f_thunk
; LOWERTYPETESTS-SAME: (i32 noundef [[TMP0:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; LOWERTYPETESTS-NEXT:    [[TMP2:%.*]] = tail call i32 @f(i32 noundef [[TMP0]]) #[[ATTR0]]
; LOWERTYPETESTS-NEXT:    ret i32 [[TMP2]]
;
;
; LOWERTYPETESTS-LABEL: define private void @.cfi.jumptable
; LOWERTYPETESTS-SAME: () #[[ATTR3:[0-9]+]] align 8 {
; LOWERTYPETESTS-NEXT:  entry:
; LOWERTYPETESTS-NEXT:    call void asm sideeffect "jmp ${0:c}@plt\0Aint3\0Aint3\0Aint3\0Ajmp ${1:c}@plt\0Aint3\0Aint3\0Aint3\0A", "s,s"(ptr @f, ptr @f_thunk)
; LOWERTYPETESTS-NEXT:    unreachable
;