File: gepphigep.ll

package info (click to toggle)
llvm-toolchain-6.0 1:6.0-1~bpo9+1
  • links: PTS, VCS
  • area: main
  • in suites: stretch-backports
  • size: 594,652 kB
  • sloc: cpp: 3,044,500; ansic: 595,051; asm: 271,890; python: 128,923; objc: 106,554; sh: 21,854; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,214; cs: 2,027; xml: 686; php: 212; csh: 117
file content (186 lines) | stat: -rw-r--r-- 6,214 bytes parent folder | download | duplicates (18)
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
; RUN: opt -instcombine -S  < %s | FileCheck %s

%struct1 = type { %struct2*, i32, i32, i32 }
%struct2 = type { i32, i32 }
%struct3 = type { i32, %struct4, %struct4 }
%struct4 = type { %struct2, %struct2 }

define i32 @test1(%struct1* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19) {
bb:
  %tmp = getelementptr inbounds %struct1, %struct1* %dm, i64 0, i32 0
  %tmp1 = load %struct2*, %struct2** %tmp, align 8
  br i1 %tmp4, label %bb1, label %bb2

bb1:
  %tmp10 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9
  %tmp11 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 0
  store i32 0, i32* %tmp11, align 4
  br label %bb3

bb2:
  %tmp20 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19
  %tmp21 = getelementptr inbounds %struct2, %struct2* %tmp20, i64 0, i32 0
  store i32 0, i32* %tmp21, align 4
  br label %bb3

bb3:
  %phi = phi %struct2* [ %tmp10, %bb1 ], [ %tmp20, %bb2 ]
  %tmp24 = getelementptr inbounds %struct2, %struct2* %phi, i64 0, i32 1
  %tmp25 = load i32, i32* %tmp24, align 4
  ret i32 %tmp25

; CHECK-LABEL: @test1(
; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9, i32 0
; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19, i32 0
; CHECK: %[[PHI:[0-9A-Za-z]+]] = phi i64 [ %tmp9, %bb1 ], [ %tmp19, %bb2 ]
; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %[[PHI]], i32 1

}

define i32 @test2(%struct1* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19) {
bb:
  %tmp = getelementptr inbounds %struct1, %struct1* %dm, i64 0, i32 0
  %tmp1 = load %struct2*, %struct2** %tmp, align 8
  %tmp10 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9
  %tmp11 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 0
  store i32 0, i32* %tmp11, align 4
  %tmp20 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19
  %tmp21 = getelementptr inbounds %struct2, %struct2* %tmp20, i64 0, i32 0
  store i32 0, i32* %tmp21, align 4
  %tmp24 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 1
  %tmp25 = load i32, i32* %tmp24, align 4
  ret i32 %tmp25

; CHECK-LABEL: @test2(
; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9, i32 0
; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19, i32 0
; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9, i32 1
}

; Check that instcombine doesn't insert GEPs before landingpad.

define i32 @test3(%struct3* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19, i64 %tmp20, i64 %tmp21) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
bb:
  %tmp = getelementptr inbounds %struct3, %struct3* %dm, i64 0
  br i1 %tmp4, label %bb1, label %bb2

bb1:
  %tmp1 = getelementptr inbounds %struct3, %struct3* %tmp, i64 %tmp19, i32 1
  %tmp11 = getelementptr inbounds %struct4, %struct4* %tmp1, i64 0, i32 0, i32 0
  store i32 0, i32* %tmp11, align 4
  br label %bb3

bb2:
  %tmp2 = getelementptr inbounds %struct3, %struct3* %tmp, i64 %tmp20, i32 1
  %tmp12 = getelementptr inbounds %struct4, %struct4* %tmp2, i64 0, i32 0, i32 1
  store i32 0, i32* %tmp12, align 4
  br label %bb3

bb3:
  %phi = phi %struct4* [ %tmp1, %bb1 ], [ %tmp2, %bb2 ]
  %tmp22 = invoke i32 @foo1(i32 11) to label %bb4 unwind label %bb5

bb4:
  ret i32 0

bb5:
  %tmp27 = landingpad { i8*, i32 } catch i8* bitcast (i8** @_ZTIi to i8*)
  %tmp34 = getelementptr inbounds %struct4, %struct4* %phi, i64 %tmp21, i32 1
  %tmp35 = getelementptr inbounds %struct2, %struct2* %tmp34, i64 0, i32 1
  %tmp25 = load i32, i32* %tmp35, align 4
  ret i32 %tmp25

; CHECK-LABEL: @test3(
; CHECK: bb5:
; CHECK-NEXT: {{.*}}landingpad { i8*, i32 }
}

@_ZTIi = external constant i8*
declare i32 @__gxx_personality_v0(...)
declare i32 @foo1(i32)


; Check that instcombine doesn't fold GEPs into themselves through a loop
; back-edge.

define i8* @test4(i32 %value, i8* %buffer) {
entry:
  %incptr = getelementptr inbounds i8, i8* %buffer, i64 1
  %cmp = icmp ugt i32 %value, 127
  br i1 %cmp, label %loop.header, label %exit

loop.header:
  br label %loop.body

loop.body:
  %loopptr = phi i8* [ %incptr, %loop.header ], [ %incptr2, %loop.body ]
  %newval = phi i32 [ %value, %loop.header ], [ %shr, %loop.body ]
  %shr = lshr i32 %newval, 7
  %incptr2 = getelementptr inbounds i8, i8* %loopptr, i64 1
  %cmp2 = icmp ugt i32 %shr, 127
  br i1 %cmp2, label %loop.body, label %loop.exit

loop.exit:
  %exitptr = phi i8* [ %incptr2, %loop.body ]
  br label %exit

exit:
  %ptr2 = phi i8* [ %exitptr, %loop.exit ], [ %incptr, %entry ]
  %incptr3 = getelementptr inbounds i8, i8* %ptr2, i64 1
  ret i8* %incptr3

; CHECK-LABEL: @test4(
; CHECK: loop.body:
; CHECK: getelementptr{{.*}}i64 1
; CHECK: exit:
}

@.str.4 = external unnamed_addr constant [100 x i8], align 1

; Instcombine shouldn't add new PHI nodes while folding GEPs if that will leave
; old PHI nodes behind as this is not clearly beneficial.
; CHECK-LABEL: @test5(
define void @test5(i16 *%idx, i8 **%in) #0 {
entry:
  %0 = load i8*, i8** %in
  %incdec.ptr = getelementptr inbounds i8, i8* %0, i32 1
  %1 = load i8, i8* %incdec.ptr, align 1
  %cmp23 = icmp eq i8 %1, 54
  br i1 %cmp23, label %while.cond, label %if.then.25

if.then.25:
  call void @g(i8* getelementptr inbounds ([100 x i8], [100 x i8]* @.str.4, i32 0, i32 0))
  br label %while.cond

while.cond:
; CHECK-LABEL: while.cond
; CHECK-NOT: phi i8* [ %0, %entry ], [ %Ptr, %while.body ], [ %0, %if.then.25 ]
  %Ptr = phi i8* [ %incdec.ptr, %entry ], [ %incdec.ptr32, %while.body], [%incdec.ptr, %if.then.25 ]
  %2 = load i8, i8* %Ptr
  %and = and i8 %2, 64
  %lnot = icmp eq i8 %and, 0
  br i1 %lnot, label %while.body, label %while.cond.33

while.body:
  %incdec.ptr32 = getelementptr inbounds i8, i8* %Ptr, i32 1
  br label %while.cond

while.cond.33:
  %incdec.ptr34 = getelementptr inbounds i8, i8* %Ptr, i32 1
  br label %while.cond.57

while.cond.57:
  %3 = load i8, i8* %incdec.ptr34, align 1
  %conv59 = zext i8 %3 to i32
  %arrayidx61 = getelementptr inbounds i16, i16* %idx, i32 %conv59
  %4 = load i16, i16* %arrayidx61, align 2
  %and63 = and i16 %4, 2048
  %tobool64 = icmp eq i16 %and63, 0
  br i1 %tobool64, label %while.cond.73, label %while.cond.57

while.cond.73:
  br label %while.cond.73

}

declare void @g(i8*)