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
|
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -o - %s -mtriple=x86_64-unknown-linux-gnu --run-pass=peephole-opt | FileCheck %s
# Test that TEST64rr is erased in `test_erased`, and kept in `test_not_erased_when_sf_used`
# and `test_not_erased_when_eflags_change`.
--- |
; ModuleID = 'tmp.ll'
source_filename = "tmp.ll"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
define i64 @test_erased(ptr %0, i64 %1, i64 %2) {
%4 = load i64, ptr %0, align 8
%5 = and i64 %4, 3
%6 = icmp eq i64 %5, 0
%7 = select i1 %6, i64 %1, i64 %5
store i64 %7, ptr %0, align 8
ret i64 %5
}
define i64 @test_not_erased_when_sf_used(ptr %0, i64 %1, i64 %2, i64 %3) {
%5 = load i64, ptr %0, align 8
%6 = and i64 %5, 3
%7 = icmp slt i64 %6, 0
%8 = select i1 %7, i64 %1, i64 %6
store i64 %8, ptr %0, align 8
ret i64 %5
}
define void @test_not_erased_when_eflags_change(ptr %0, i64 %1, i64 %2, i64 %3, ptr %4) {
%6 = load i64, ptr %0, align 8
%7 = and i64 %6, 3
%8 = xor i64 %3, 5
%9 = icmp eq i64 %7, 0
%10 = select i1 %9, i64 %1, i64 %7
store i64 %10, ptr %0, align 8
store i64 %8, ptr %4, align 8
ret void
}
...
---
name: test_erased
alignment: 16
tracksDebugUserValues: false
registers:
- { id: 0, class: gr64, preferred-register: '' }
- { id: 1, class: gr64, preferred-register: '' }
- { id: 2, class: gr64, preferred-register: '' }
- { id: 3, class: gr64, preferred-register: '' }
- { id: 4, class: gr32, preferred-register: '' }
- { id: 5, class: gr32, preferred-register: '' }
- { id: 6, class: gr64, preferred-register: '' }
- { id: 7, class: gr64, preferred-register: '' }
liveins:
- { reg: '$rdi', virtual-reg: '%0' }
- { reg: '$rsi', virtual-reg: '%1' }
frameInfo:
maxAlignment: 1
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.3):
liveins: $rdi, $rsi
; CHECK-LABEL: name: test_erased
; CHECK: [[COPY:%[0-9]+]]:gr64 = COPY $rsi
; CHECK-NEXT: [[COPY1:%[0-9]+]]:gr64 = COPY $rdi
; CHECK-NEXT: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm [[COPY1]], 1, $noreg, 0, $noreg :: (load (s64) from %ir.0)
; CHECK-NEXT: [[COPY2:%[0-9]+]]:gr32 = COPY [[MOV64rm]].sub_32bit
; CHECK-NEXT: [[AND32ri8_:%[0-9]+]]:gr32 = AND32ri8 [[COPY2]], 3, implicit-def $eflags
; CHECK-NEXT: [[SUBREG_TO_REG:%[0-9]+]]:gr64 = SUBREG_TO_REG 0, killed [[AND32ri8_]], %subreg.sub_32bit
; CHECK-NEXT: [[CMOV64rr:%[0-9]+]]:gr64 = CMOV64rr [[SUBREG_TO_REG]], [[COPY]], 4, implicit $eflags
; CHECK-NEXT: MOV64mr [[COPY1]], 1, $noreg, 0, $noreg, killed [[CMOV64rr]] :: (store (s64) into %ir.0)
; CHECK-NEXT: $rax = COPY [[SUBREG_TO_REG]]
; CHECK-NEXT: RET 0, $rax
%1:gr64 = COPY $rsi
%0:gr64 = COPY $rdi
%3:gr64 = MOV64rm %0, 1, $noreg, 0, $noreg :: (load (s64) from %ir.0)
%4:gr32 = COPY %3.sub_32bit
%5:gr32 = AND32ri8 %4, 3, implicit-def dead $eflags
%6:gr64 = SUBREG_TO_REG 0, killed %5, %subreg.sub_32bit
TEST64rr %6, %6, implicit-def $eflags
%7:gr64 = CMOV64rr %6, %1, 4, implicit $eflags
MOV64mr %0, 1, $noreg, 0, $noreg, killed %7 :: (store (s64) into %ir.0)
$rax = COPY %6
RET 0, $rax
...
---
name: test_not_erased_when_sf_used
alignment: 16
tracksDebugUserValues: false
registers:
- { id: 0, class: gr64, preferred-register: '' }
- { id: 1, class: gr64, preferred-register: '' }
- { id: 2, class: gr64, preferred-register: '' }
- { id: 3, class: gr64, preferred-register: '' }
- { id: 4, class: gr64, preferred-register: '' }
- { id: 5, class: gr32, preferred-register: '' }
- { id: 6, class: gr32, preferred-register: '' }
- { id: 7, class: gr64, preferred-register: '' }
- { id: 8, class: gr64, preferred-register: '' }
liveins:
- { reg: '$rdi', virtual-reg: '%0' }
- { reg: '$rsi', virtual-reg: '%1' }
frameInfo:
maxAlignment: 1
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.4):
liveins: $rdi, $rsi
; CHECK-LABEL: name: test_not_erased_when_sf_used
; CHECK: [[COPY:%[0-9]+]]:gr64 = COPY $rsi
; CHECK-NEXT: [[COPY1:%[0-9]+]]:gr64 = COPY $rdi
; CHECK-NEXT: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm [[COPY1]], 1, $noreg, 0, $noreg :: (load (s64) from %ir.0)
; CHECK-NEXT: [[COPY2:%[0-9]+]]:gr32 = COPY [[MOV64rm]].sub_32bit
; CHECK-NEXT: [[AND32ri8_:%[0-9]+]]:gr32 = AND32ri8 [[COPY2]], 3, implicit-def dead $eflags
; CHECK-NEXT: [[SUBREG_TO_REG:%[0-9]+]]:gr64 = SUBREG_TO_REG 0, killed [[AND32ri8_]], %subreg.sub_32bit
; CHECK-NEXT: TEST64rr [[SUBREG_TO_REG]], [[SUBREG_TO_REG]], implicit-def $eflags
; CHECK-NEXT: [[CMOV64rr:%[0-9]+]]:gr64 = CMOV64rr [[SUBREG_TO_REG]], [[COPY]], 8, implicit $eflags
; CHECK-NEXT: MOV64mr [[COPY1]], 1, $noreg, 0, $noreg, killed [[CMOV64rr]] :: (store (s64) into %ir.0)
; CHECK-NEXT: $rax = COPY [[MOV64rm]]
; CHECK-NEXT: RET 0, $rax
%1:gr64 = COPY $rsi
%0:gr64 = COPY $rdi
%4:gr64 = MOV64rm %0, 1, $noreg, 0, $noreg :: (load (s64) from %ir.0)
%5:gr32 = COPY %4.sub_32bit
%6:gr32 = AND32ri8 %5, 3, implicit-def dead $eflags
%7:gr64 = SUBREG_TO_REG 0, killed %6, %subreg.sub_32bit
TEST64rr %7, %7, implicit-def $eflags
%8:gr64 = CMOV64rr %7, %1, 8, implicit $eflags
MOV64mr %0, 1, $noreg, 0, $noreg, killed %8 :: (store (s64) into %ir.0)
$rax = COPY %4
RET 0, $rax
...
---
name: test_not_erased_when_eflags_change
alignment: 16
tracksDebugUserValues: false
registers:
- { id: 0, class: gr64, preferred-register: '' }
- { id: 1, class: gr64, preferred-register: '' }
- { id: 2, class: gr64, preferred-register: '' }
- { id: 3, class: gr64, preferred-register: '' }
- { id: 4, class: gr64, preferred-register: '' }
- { id: 5, class: gr64, preferred-register: '' }
- { id: 6, class: gr32, preferred-register: '' }
- { id: 7, class: gr32, preferred-register: '' }
- { id: 8, class: gr64, preferred-register: '' }
- { id: 9, class: gr64, preferred-register: '' }
- { id: 10, class: gr64, preferred-register: '' }
liveins:
- { reg: '$rdi', virtual-reg: '%0' }
- { reg: '$rsi', virtual-reg: '%1' }
- { reg: '$rcx', virtual-reg: '%3' }
- { reg: '$r8', virtual-reg: '%4' }
frameInfo:
maxAlignment: 1
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.5):
liveins: $rdi, $rsi, $rcx, $r8
; CHECK-LABEL: name: test_not_erased_when_eflags_change
; CHECK: [[COPY:%[0-9]+]]:gr64 = COPY $r8
; CHECK-NEXT: [[COPY1:%[0-9]+]]:gr64 = COPY $rcx
; CHECK-NEXT: [[COPY2:%[0-9]+]]:gr64 = COPY $rsi
; CHECK-NEXT: [[COPY3:%[0-9]+]]:gr64 = COPY $rdi
; CHECK-NEXT: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm [[COPY3]], 1, $noreg, 0, $noreg :: (load (s64) from %ir.0)
; CHECK-NEXT: [[COPY4:%[0-9]+]]:gr32 = COPY [[MOV64rm]].sub_32bit
; CHECK-NEXT: [[AND32ri8_:%[0-9]+]]:gr32 = AND32ri8 [[COPY4]], 3, implicit-def dead $eflags
; CHECK-NEXT: [[SUBREG_TO_REG:%[0-9]+]]:gr64 = SUBREG_TO_REG 0, killed [[AND32ri8_]], %subreg.sub_32bit
; CHECK-NEXT: [[XOR64ri8_:%[0-9]+]]:gr64 = XOR64ri8 [[COPY1]], 5, implicit-def dead $eflags
; CHECK-NEXT: TEST64rr [[SUBREG_TO_REG]], [[SUBREG_TO_REG]], implicit-def $eflags
; CHECK-NEXT: [[CMOV64rr:%[0-9]+]]:gr64 = CMOV64rr [[SUBREG_TO_REG]], [[COPY2]], 4, implicit $eflags
; CHECK-NEXT: MOV64mr [[COPY3]], 1, $noreg, 0, $noreg, killed [[CMOV64rr]] :: (store (s64) into %ir.0)
; CHECK-NEXT: MOV64mr [[COPY]], 1, $noreg, 0, $noreg, killed [[XOR64ri8_]] :: (store (s64) into %ir.4)
; CHECK-NEXT: RET 0
%4:gr64 = COPY $r8
%3:gr64 = COPY $rcx
%1:gr64 = COPY $rsi
%0:gr64 = COPY $rdi
%5:gr64 = MOV64rm %0, 1, $noreg, 0, $noreg :: (load (s64) from %ir.0)
%6:gr32 = COPY %5.sub_32bit
%7:gr32 = AND32ri8 %6, 3, implicit-def dead $eflags
%8:gr64 = SUBREG_TO_REG 0, killed %7, %subreg.sub_32bit
%9:gr64 = XOR64ri8 %3, 5, implicit-def dead $eflags
TEST64rr %8, %8, implicit-def $eflags
%10:gr64 = CMOV64rr %8, %1, 4, implicit $eflags
MOV64mr %0, 1, $noreg, 0, $noreg, killed %10 :: (store (s64) into %ir.0)
MOV64mr %4, 1, $noreg, 0, $noreg, killed %9 :: (store (s64) into %ir.4)
RET 0
...
|
