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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=gvn-hoist < %s | FileCheck %s
; Check that the call and fcmp are hoisted.
define void @fun(float %__b) minsize {
; CHECK-LABEL: @fun(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[TMP0:%.*]] = call float @llvm.fabs.f32(float [[__B:%.*]])
; CHECK-NEXT: [[CMPINF7:%.*]] = fcmp oeq float [[TMP0]], 0x7FF0000000000000
; CHECK-NEXT: br i1 undef, label [[IF_THEN8:%.*]], label [[LOR_LHS_FALSE:%.*]]
; CHECK: lor.lhs.false:
; CHECK-NEXT: unreachable
; CHECK: if.then8:
; CHECK-NEXT: ret void
;
entry:
br label %if.then
if.then: ; preds = %entry
br i1 undef, label %if.then8, label %lor.lhs.false
lor.lhs.false: ; preds = %if.then
%0 = call float @llvm.fabs.f32(float %__b) #2
%cmpinf7 = fcmp oeq float %0, 0x7FF0000000000000
unreachable
if.then8: ; preds = %if.then
%1 = call float @llvm.fabs.f32(float %__b) #2
%cmpinf10 = fcmp oeq float %1, 0x7FF0000000000000
ret void
}
declare float @llvm.fabs.f32(float)
; Check that extractvalues are not hoisted into entry, but that non-dependent
; adds are.
define i32 @foo(i32 %x) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[X:%.*]], 1
; CHECK-NEXT: [[TMP0:%.*]] = callbr { i32, i32 } asm sideeffect "somestuff", "=r,=r,!i"()
; CHECK-NEXT: to label [[ASM_FALLTHROUGH:%.*]] [label %err.split]
; CHECK: asm.fallthrough:
; CHECK-NEXT: [[ASMRESULT:%.*]] = extractvalue { i32, i32 } [[TMP0]], 0
; CHECK-NEXT: ret i32 [[ADD]]
; CHECK: err.split:
; CHECK-NEXT: [[ASMRESULT2:%.*]] = extractvalue { i32, i32 } [[TMP0]], 0
; CHECK-NEXT: ret i32 [[ADD]]
;
entry:
%0 = callbr { i32, i32 } asm sideeffect "somestuff", "=r,=r,!i"()
to label %asm.fallthrough [label %err.split]
asm.fallthrough: ; preds = %entry
%asmresult = extractvalue { i32, i32 } %0, 0
%add = add nsw i32 %x, 1
ret i32 %add
err.split: ; preds = %entry
%asmresult2 = extractvalue { i32, i32 } %0, 0
%add2 = add nsw i32 %x, 1
ret i32 %add2
}
; Check that extractvalues and dependent adds are not hoisted into entry.
define i32 @foo2() {
; CHECK-LABEL: @foo2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = callbr { i32, i32 } asm sideeffect "somestuff", "=r,=r,!i"()
; CHECK-NEXT: to label [[ASM_FALLTHROUGH:%.*]] [label %err.split]
; CHECK: asm.fallthrough:
; CHECK-NEXT: [[ASMRESULT:%.*]] = extractvalue { i32, i32 } [[TMP0]], 0
; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[ASMRESULT]], 1
; CHECK-NEXT: ret i32 [[ADD]]
; CHECK: err.split:
; CHECK-NEXT: [[ASMRESULT2:%.*]] = extractvalue { i32, i32 } [[TMP0]], 0
; CHECK-NEXT: [[ADD2:%.*]] = add nsw i32 [[ASMRESULT2]], 1
; CHECK-NEXT: ret i32 [[ADD2]]
;
entry:
%0 = callbr { i32, i32 } asm sideeffect "somestuff", "=r,=r,!i"()
to label %asm.fallthrough [label %err.split]
asm.fallthrough: ; preds = %entry
%asmresult = extractvalue { i32, i32 } %0, 0
%add = add nsw i32 %asmresult, 1
ret i32 %add
err.split: ; preds = %entry
%asmresult2 = extractvalue { i32, i32 } %0, 0
%add2 = add nsw i32 %asmresult2, 1
ret i32 %add2
}
; Ensure we don't hoist loads that are modified by callbr.
@x = global i32 0
define i32 @foo3() {
; CHECK-LABEL: @foo3(
; CHECK-NEXT: entry:
; CHECK-NEXT: callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x)
; CHECK-NEXT: to label [[ASM_FALLTHROUGH:%.*]] [label %err.split]
; CHECK: asm.fallthrough:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @x, align 4
; CHECK-NEXT: ret i32 [[TMP0]]
; CHECK: err.split:
; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr @x, align 4
; CHECK-NEXT: ret i32 [[TMP1]]
;
entry:
callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x)
to label %asm.fallthrough [label %err.split]
asm.fallthrough: ; preds = %entry
%0 = load i32, ptr @x
ret i32 %0
err.split: ; preds = %entry
%1 = load i32, ptr @x
ret i32 %1
}
; Ensure we do hoist loads that aren't modified by callbr, if the callbr has
; the attribute memory(argmem:readwrite).
@y = global i32 0
define i32 @foo4() {
; CHECK-LABEL: @foo4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @y, align 4
; CHECK-NEXT: callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x) #[[ATTR2:[0-9]+]]
; CHECK-NEXT: to label [[A:%.*]] [label %b]
; CHECK: a:
; CHECK-NEXT: ret i32 [[TMP0]]
; CHECK: b:
; CHECK-NEXT: ret i32 [[TMP0]]
;
entry:
callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x) memory(argmem: readwrite)
to label %a [label %b]
a: ; preds = %entry
%0 = load i32, ptr @y
ret i32 %0
b: ; preds = %entry
%1 = load i32, ptr @y
ret i32 %1
}
; Ensure we don't hoist loads that are modified by callbr, if the callbr has
; the attribute memory(argmem:readwrite).
define i32 @foo5() {
; CHECK-LABEL: @foo5(
; CHECK-NEXT: entry:
; CHECK-NEXT: callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x) #[[ATTR2]]
; CHECK-NEXT: to label [[A:%.*]] [label %b]
; CHECK: a:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @x, align 4
; CHECK-NEXT: ret i32 [[TMP0]]
; CHECK: b:
; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr @x, align 4
; CHECK-NEXT: ret i32 [[TMP1]]
;
entry:
callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x) memory(argmem: readwrite)
to label %a [label %b]
a: ; preds = %entry
%0 = load i32, ptr @x
ret i32 %0
b: ; preds = %entry
%1 = load i32, ptr @x
ret i32 %1
}
; Ensure we hoist loads that are modified by callbr, if the callbr has the
; attribute memory(argmem:none).
define i32 @foo6() {
; CHECK-LABEL: @foo6(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @x, align 4
; CHECK-NEXT: callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x) #[[ATTR3:[0-9]+]]
; CHECK-NEXT: to label [[A:%.*]] [label %b]
; CHECK: a:
; CHECK-NEXT: ret i32 [[TMP0]]
; CHECK: b:
; CHECK-NEXT: ret i32 [[TMP0]]
;
entry:
callbr void asm "", "=*m,!i"(ptr elementtype(i32) @x) memory(argmem: none)
to label %a [label %b]
a: ; preds = %entry
%0 = load i32, ptr @x
ret i32 %0
b: ; preds = %entry
%1 = load i32, ptr @x
ret i32 %1
}
|
