tbz-sgt.mir
4.11 KB
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
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64-unknown-unknown -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s
#
# Test that we can produce a tbz when we have a sgt compare against -1.
#
# The bit tested should be the size of the test register minus 1.
#
...
---
name: tbzx_sgt
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: tbzx_sgt
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: %copy:gpr64 = COPY $x0
; CHECK: TBZX %copy, 63, %bb.1
; CHECK: B %bb.0
; CHECK: bb.1:
; CHECK: RET_ReallyLR
bb.0:
successors: %bb.0, %bb.1
liveins: $x0
%copy:gpr(s64) = COPY $x0
%negative_one:gpr(s64) = G_CONSTANT i64 -1
%cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s64), %negative_one
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
G_BRCOND %cmp_trunc(s1), %bb.1
G_BR %bb.0
bb.1:
RET_ReallyLR
...
---
name: tbzw_sgt
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: tbzw_sgt
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: %copy:gpr32 = COPY $w0
; CHECK: TBZW %copy, 31, %bb.1
; CHECK: B %bb.0
; CHECK: bb.1:
; CHECK: RET_ReallyLR
bb.0:
successors: %bb.0, %bb.1
liveins: $x0
%copy:gpr(s32) = COPY $w0
%negative_one:gpr(s32) = G_CONSTANT i32 -1
%cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s32), %negative_one
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
G_BRCOND %cmp_trunc(s1), %bb.1
G_BR %bb.0
bb.1:
RET_ReallyLR
...
---
name: no_tbz_not_negative_one
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: no_tbz_not_negative_one
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: %copy:gpr32sp = COPY $w0
; CHECK: $wzr = SUBSWri %copy, 1, 0, implicit-def $nzcv
; CHECK: Bcc 12, %bb.1, implicit $nzcv
; CHECK: B %bb.0
; CHECK: bb.1:
; CHECK: RET_ReallyLR
bb.0:
successors: %bb.0, %bb.1
liveins: $x0
%copy:gpr(s32) = COPY $w0
%one:gpr(s32) = G_CONSTANT i32 1
%cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s32), %one
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
G_BRCOND %cmp_trunc(s1), %bb.1
G_BR %bb.0
bb.1:
RET_ReallyLR
...
---
name: dont_fold_and
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: dont_fold_and
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: %copy:gpr64 = COPY $x0
; CHECK: %and:gpr64sp = ANDXri %copy, 8000
; CHECK: $xzr = SUBSXri %and, 0, 0, implicit-def $nzcv
; CHECK: Bcc 10, %bb.1, implicit $nzcv
; CHECK: B %bb.0
; CHECK: bb.1:
; CHECK: RET_ReallyLR
bb.0:
successors: %bb.0, %bb.1
liveins: $x0
%copy:gpr(s64) = COPY $x0
%bit:gpr(s64) = G_CONSTANT i64 8
%negative_one:gpr(s64) = G_CONSTANT i64 -1
%c:gpr(s64) = G_CONSTANT i64 8
%and:gpr(s64) = G_AND %copy, %bit
%cmp:gpr(s32) = G_ICMP intpred(sgt), %and(s64), %negative_one
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
G_BRCOND %cmp_trunc(s1), %bb.1
G_BR %bb.0
bb.1:
RET_ReallyLR
...
---
name: dont_commute
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: dont_commute
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: %copy:gpr64 = COPY $x0
; CHECK: %negative_one:gpr64 = MOVi64imm -1
; CHECK: [[SUBSXrr:%[0-9]+]]:gpr64 = SUBSXrr %negative_one, %copy, implicit-def $nzcv
; CHECK: Bcc 12, %bb.1, implicit $nzcv
; CHECK: B %bb.0
; CHECK: bb.1:
; CHECK: RET_ReallyLR
bb.0:
successors: %bb.0, %bb.1
liveins: $x0
%copy:gpr(s64) = COPY $x0
%negative_one:gpr(s64) = G_CONSTANT i64 -1
%cmp:gpr(s32) = G_ICMP intpred(sgt), %negative_one, %copy(s64)
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
G_BRCOND %cmp_trunc(s1), %bb.1
G_BR %bb.0
bb.1:
RET_ReallyLR