1 ; RUN: opt -reassociate -gvn -S < %s | FileCheck %s
3 ; (x + 0.1234 * y) * (x + -0.1234 * y) -> (x + 0.1234 * y) * (x - 0.1234 * y)
4 define double @test1(double %x, double %y) {
6 ; CHECK-NEXT: fmul double 1.234000e-01, %y
7 ; CHECK-NEXT: fadd double %x, %mul
8 ; CHECK-NEXT: fsub double %x, %mul
9 ; CHECK-NEXT: fmul double %add{{.*}}, %add{{.*}}
10 ; CHECK-NEXT: ret double %mul
12 %mul = fmul double 1.234000e-01, %y
13 %add = fadd double %mul, %x
14 %mul1 = fmul double -1.234000e-01, %y
15 %add2 = fadd double %mul1, %x
16 %mul3 = fmul double %add, %add2
20 ; (x + -0.1234 * y) * (x + -0.1234 * y) -> (x - 0.1234 * y) * (x - 0.1234 * y)
21 define double @test2(double %x, double %y) {
23 ; CHECK-NEXT: fmul double 1.234000e-01, %y
24 ; CHECK-NEXT: fsub double %x, %mul
25 ; CHECK-NEXT: fmul double %add{{.*}}, %add{{.*}}
26 ; CHECK-NEXT: ret double %mul
28 %mul = fmul double %y, -1.234000e-01
29 %add = fadd double %mul, %x
30 %mul1 = fmul double %y, -1.234000e-01
31 %add2 = fadd double %mul1, %x
32 %mul3 = fmul double %add, %add2
36 ; (x + 0.1234 / y) * (x + -0.1234 / y) -> (x + 0.1234 / y) * (x - 0.1234 / y)
37 define double @test3(double %x, double %y) {
39 ; CHECK-NEXT: fdiv double 1.234000e-01, %y
40 ; CHECK-NEXT: fadd double %x, %div
41 ; CHECK-NEXT: fsub double %x, %div
42 ; CHECK-NEXT: fmul double %add{{.*}}, %add{{.*}}
43 ; CHECK-NEXT: ret double
45 %div = fdiv double 1.234000e-01, %y
46 %add = fadd double %div, %x
47 %div1 = fdiv double -1.234000e-01, %y
48 %add2 = fadd double %div1, %x
49 %mul3 = fmul double %add, %add2
53 ; (x + 0.1234 * y) * (x - -0.1234 * y) -> (x + 0.1234 * y) * (x + 0.1234 * y)
54 define double @test4(double %x, double %y) {
56 ; CHECK-NEXT: fmul double 1.234000e-01, %y
57 ; CHECK-NEXT: fadd double %x, %mul
58 ; CHECK-NEXT: fmul double %add{{.*}}, %add{{.*}}
59 ; CHECK-NEXT: ret double
61 %mul = fmul double %y, 1.234000e-01
62 %add = fadd double %mul, %x
63 %mul1 = fmul double %y, -1.234000e-01
64 %add2 = fsub double %x, %mul1
65 %mul3 = fmul double %add, %add2
69 ; Canonicalize (x - -1234 * y)
70 define i64 @test5(i64 %x, i64 %y) {
72 ; CHECK-NEXT: mul i64 %y, 1234
73 ; CHECK-NEXT: add i64 %mul, %x
74 ; CHECK-NEXT: ret i64 %sub
76 %mul = mul i64 %y, -1234
77 %sub = sub i64 %x, %mul
81 ; Canonicalize (x - -0.1234 * y)
82 define double @test6(double %x, double %y) {
84 ; CHECK-NEXT: fmul double 1.234000e-01, %y
85 ; CHECK-NEXT: fadd double %x, %mul
86 ; CHECK-NEXT: ret double
88 %mul = fmul double -1.234000e-01, %y
89 %sub = fsub double %x, %mul
93 ; Don't modify (-0.1234 * y - x)
94 define double @test7(double %x, double %y) {
96 ; CHECK-NEXT: fmul double -1.234000e-01, %y
97 ; CHECK-NEXT: fsub double %mul, %x
98 ; CHECK-NEXT: ret double %sub
100 %mul = fmul double -1.234000e-01, %y
101 %sub = fsub double %mul, %x
105 ; Canonicalize (-0.1234 * y + x) -> (x - 0.1234 * y)
106 define double @test8(double %x, double %y) {
107 ; CHECK-LABEL: @test8
108 ; CHECK-NEXT: fmul double 1.234000e-01, %y
109 ; CHECK-NEXT: fsub double %x, %mul
110 ; CHECK-NEXT: ret double %add
112 %mul = fmul double -1.234000e-01, %y
113 %add = fadd double %mul, %x
117 ; Canonicalize (y * -0.1234 + x) -> (x - 0.1234 * y)
118 define double @test9(double %x, double %y) {
119 ; CHECK-LABEL: @test9
120 ; CHECK-NEXT: fmul double 1.234000e-01, %y
121 ; CHECK-NEXT: fsub double %x, %mul
122 ; CHECK-NEXT: ret double %add
124 %mul = fmul double %y, -1.234000e-01
125 %add = fadd double %mul, %x
129 ; Canonicalize (x - -1234 udiv y)
130 define i64 @test10(i64 %x, i64 %y) {
131 ; CHECK-LABEL: @test10
132 ; CHECK-NEXT: udiv i64 1234, %y
133 ; CHECK-NEXT: add i64 %div, %x
134 ; CHECK-NEXT: ret i64 %sub
136 %div = udiv i64 -1234, %y
137 %sub = sub i64 %x, %div
141 ; Canonicalize (x - -1234 sdiv y)
142 define i64 @test11(i64 %x, i64 %y) {
143 ; CHECK-LABEL: @test11
144 ; CHECK-NEXT: sdiv i64 1234, %y
145 ; CHECK-NEXT: add i64 %div, %x
146 ; CHECK-NEXT: ret i64 %sub
148 %div = sdiv i64 -1234, %y
149 %sub = sub i64 %x, %div
153 ; Canonicalize (x - -0.1234 / y)
154 define double @test12(double %x, double %y) {
155 ; CHECK-LABEL: @test12
156 ; CHECK-NEXT: fdiv double 1.234000e-01, %y
157 ; CHECK-NEXT: fadd double %x, %div
158 ; CHECK-NEXT: ret double %sub
160 %div = fdiv double -1.234000e-01, %y
161 %sub = fsub double %x, %div
165 ; Canonicalize (x - -0.1234 urem y)
166 define i64 @test13(i64 %x, i64 %y) {
167 ; CHECK-LABEL: @test13
168 ; CHECK-NEXT: urem i64 1234, %y
169 ; CHECK-NEXT: add i64 %urem, %x
170 ; CHECK-NEXT: ret i64 %sub
172 %urem = urem i64 -1234, %y
173 %sub = sub i64 %x, %urem
177 ; Canonicalize (x + -0.1234 srem y)
178 define i64 @test14(i64 %x, i64 %y) {
179 ; CHECK-LABEL: @test14
180 ; CHECK-NEXT: srem i64 1234, %y
181 ; CHECK-NEXT: sub i64 %x, %srem
182 ; CHECK-NEXT: ret i64 %add
184 %srem = srem i64 -1234, %y
185 %add = add i64 %x, %srem
189 ; Don't modify (-0.1234 srem y - x)
190 define i64 @test15(i64 %x, i64 %y) {
191 ; CHECK-LABEL: @test15
192 ; CHECK-NEXT: %srem = srem i64 -1234, %y
193 ; CHECK-NEXT: %sub = sub i64 %srem, %x
194 ; CHECK-NEXT: ret i64 %sub
196 %srem = srem i64 -1234, %y
197 %sub = sub i64 %srem, %x
201 ; Canonicalize (x - -0.1234 frem y)
202 define double @test16(double %x, double %y) {
203 ; CHECK-LABEL: @test16
204 ; CHECK-NEXT: frem double 1.234000e-01, %y
205 ; CHECK-NEXT: fadd double %x, %rem
206 ; CHECK-NEXT: ret double %sub
208 %rem = frem double -1.234000e-01, %y
209 %sub = fsub double %x, %rem
213 ; Canonicalize (x + -0.1234 frem y)
214 define double @test17(double %x, double %y) {
215 ; CHECK-LABEL: @test17
216 ; CHECK-NEXT: frem double 1.234000e-01, %y
217 ; CHECK-NEXT: fsub double %x, %rem
218 ; CHECK-NEXT: ret double %add
220 %rem = frem double -1.234000e-01, %y
221 %add = fadd double %x, %rem
225 ; Canonicalize (-0.1234 frem y + x) -> (x - 0.1234 frem y)
226 define double @test18(double %x, double %y) {
227 ; CHECK-LABEL: @test18
228 ; CHECK-NEXT: frem double 1.234000e-01, %y
229 ; CHECK-NEXT: fsub double %x, %rem
230 ; CHECK-NEXT: ret double %add
232 %rem = frem double -1.234000e-01, %y
233 %add = fadd double %x, %rem