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
|
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=x86-64 | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=x86-64 -stop-after machine-combiner -o /dev/null 2>&1 | FileCheck %s --check-prefix=DEAD
; Verify that integer multiplies are reassociated. The first multiply in
; each test should be independent of the result of the preceding add (lea).
; TODO: This test does not actually test i16 machine instruction reassociation
; because the operands are being promoted to i32 types.
define i16 @reassociate_muls_i16(i16 %x0, i16 %x1, i16 %x2, i16 %x3) {
; CHECK-LABEL: reassociate_muls_i16:
; CHECK: # BB#0:
; CHECK-NEXT: leal (%rdi,%rsi), %eax
; CHECK-NEXT: imull %ecx, %edx
; CHECK-NEXT: imull %edx, %eax
; CHECK-NEXT: retq
%t0 = add i16 %x0, %x1
%t1 = mul i16 %x2, %t0
%t2 = mul i16 %x3, %t1
ret i16 %t2
}
define i32 @reassociate_muls_i32(i32 %x0, i32 %x1, i32 %x2, i32 %x3) {
; CHECK-LABEL: reassociate_muls_i32:
; CHECK: # BB#0:
; CHECK-NEXT: leal (%rdi,%rsi), %eax
; CHECK-NEXT: imull %ecx, %edx
; CHECK-NEXT: imull %edx, %eax
; CHECK-NEXT: retq
; DEAD: ADD32rr
; DEAD-NEXT: IMUL32rr{{.*}}implicit-def dead %eflags
; DEAD-NEXT: IMUL32rr{{.*}}implicit-def dead %eflags
%t0 = add i32 %x0, %x1
%t1 = mul i32 %x2, %t0
%t2 = mul i32 %x3, %t1
ret i32 %t2
}
define i64 @reassociate_muls_i64(i64 %x0, i64 %x1, i64 %x2, i64 %x3) {
; CHECK-LABEL: reassociate_muls_i64:
; CHECK: # BB#0:
; CHECK-NEXT: leaq (%rdi,%rsi), %rax
; CHECK-NEXT: imulq %rcx, %rdx
; CHECK-NEXT: imulq %rdx, %rax
; CHECK-NEXT: retq
%t0 = add i64 %x0, %x1
%t1 = mul i64 %x2, %t0
%t2 = mul i64 %x3, %t1
ret i64 %t2
}
; Verify that integer 'ands' are reassociated. The first 'and' in
; each test should be independent of the result of the preceding sub.
define i8 @reassociate_ands_i8(i8 %x0, i8 %x1, i8 %x2, i8 %x3) {
; CHECK-LABEL: reassociate_ands_i8:
; CHECK: # BB#0:
; CHECK-NEXT: subb %sil, %dil
; CHECK-NEXT: andb %cl, %dl
; CHECK-NEXT: andb %dil, %dl
; CHECK_NEXT: movb %dx, %ax
; CHECK_NEXT: retq
%t0 = sub i8 %x0, %x1
%t1 = and i8 %x2, %t0
%t2 = and i8 %x3, %t1
ret i8 %t2
}
; TODO: No way to test i16? These appear to always get promoted to i32.
define i32 @reassociate_ands_i32(i32 %x0, i32 %x1, i32 %x2, i32 %x3) {
; CHECK-LABEL: reassociate_ands_i32:
; CHECK: # BB#0:
; CHECK-NEXT: subl %esi, %edi
; CHECK-NEXT: andl %ecx, %edx
; CHECK-NEXT: andl %edi, %edx
; CHECK_NEXT: movl %edx, %eax
; CHECK_NEXT: retq
%t0 = sub i32 %x0, %x1
%t1 = and i32 %x2, %t0
%t2 = and i32 %x3, %t1
ret i32 %t2
}
define i64 @reassociate_ands_i64(i64 %x0, i64 %x1, i64 %x2, i64 %x3) {
; CHECK-LABEL: reassociate_ands_i64:
; CHECK: # BB#0:
; CHECK-NEXT: subq %rsi, %rdi
; CHECK-NEXT: andq %rcx, %rdx
; CHECK-NEXT: andq %rdi, %rdx
; CHECK-NEXT: movq %rdx, %rax
; CHECK_NEXT: retq
%t0 = sub i64 %x0, %x1
%t1 = and i64 %x2, %t0
%t2 = and i64 %x3, %t1
ret i64 %t2
}
; Verify that integer 'ors' are reassociated. The first 'or' in
; each test should be independent of the result of the preceding sub.
define i8 @reassociate_ors_i8(i8 %x0, i8 %x1, i8 %x2, i8 %x3) {
; CHECK-LABEL: reassociate_ors_i8:
; CHECK: # BB#0:
; CHECK-NEXT: subb %sil, %dil
; CHECK-NEXT: orb %cl, %dl
; CHECK-NEXT: orb %dil, %dl
; CHECK_NEXT: movb %dx, %ax
; CHECK_NEXT: retq
%t0 = sub i8 %x0, %x1
%t1 = or i8 %x2, %t0
%t2 = or i8 %x3, %t1
ret i8 %t2
}
; TODO: No way to test i16? These appear to always get promoted to i32.
define i32 @reassociate_ors_i32(i32 %x0, i32 %x1, i32 %x2, i32 %x3) {
; CHECK-LABEL: reassociate_ors_i32:
; CHECK: # BB#0:
; CHECK-NEXT: subl %esi, %edi
; CHECK-NEXT: orl %ecx, %edx
; CHECK-NEXT: orl %edi, %edx
; CHECK_NEXT: movl %edx, %eax
; CHECK_NEXT: retq
%t0 = sub i32 %x0, %x1
%t1 = or i32 %x2, %t0
%t2 = or i32 %x3, %t1
ret i32 %t2
}
define i64 @reassociate_ors_i64(i64 %x0, i64 %x1, i64 %x2, i64 %x3) {
; CHECK-LABEL: reassociate_ors_i64:
; CHECK: # BB#0:
; CHECK-NEXT: subq %rsi, %rdi
; CHECK-NEXT: orq %rcx, %rdx
; CHECK-NEXT: orq %rdi, %rdx
; CHECK-NEXT: movq %rdx, %rax
; CHECK_NEXT: retq
%t0 = sub i64 %x0, %x1
%t1 = or i64 %x2, %t0
%t2 = or i64 %x3, %t1
ret i64 %t2
}
; Verify that integer 'xors' are reassociated. The first 'xor' in
; each test should be independent of the result of the preceding sub.
define i8 @reassociate_xors_i8(i8 %x0, i8 %x1, i8 %x2, i8 %x3) {
; CHECK-LABEL: reassociate_xors_i8:
; CHECK: # BB#0:
; CHECK-NEXT: subb %sil, %dil
; CHECK-NEXT: xorb %cl, %dl
; CHECK-NEXT: xorb %dil, %dl
; CHECK_NEXT: movb %dx, %ax
; CHECK_NEXT: retq
%t0 = sub i8 %x0, %x1
%t1 = xor i8 %x2, %t0
%t2 = xor i8 %x3, %t1
ret i8 %t2
}
; TODO: No way to test i16? These appear to always get promoted to i32.
define i32 @reassociate_xors_i32(i32 %x0, i32 %x1, i32 %x2, i32 %x3) {
; CHECK-LABEL: reassociate_xors_i32:
; CHECK: # BB#0:
; CHECK-NEXT: subl %esi, %edi
; CHECK-NEXT: xorl %ecx, %edx
; CHECK-NEXT: xorl %edi, %edx
; CHECK_NEXT: movl %edx, %eax
; CHECK_NEXT: retq
%t0 = sub i32 %x0, %x1
%t1 = xor i32 %x2, %t0
%t2 = xor i32 %x3, %t1
ret i32 %t2
}
define i64 @reassociate_xors_i64(i64 %x0, i64 %x1, i64 %x2, i64 %x3) {
; CHECK-LABEL: reassociate_xors_i64:
; CHECK: # BB#0:
; CHECK-NEXT: subq %rsi, %rdi
; CHECK-NEXT: xorq %rcx, %rdx
; CHECK-NEXT: xorq %rdi, %rdx
; CHECK-NEXT: movq %rdx, %rax
; CHECK_NEXT: retq
%t0 = sub i64 %x0, %x1
%t1 = xor i64 %x2, %t0
%t2 = xor i64 %x3, %t1
ret i64 %t2
}
|
