1 ; RUN: llc -mtriple=x86_64-unknown-unknown -march=x86-64 < %s | FileCheck %s 2 3 ; CHECK-LABEL: fmul2_f32: 4 ; CHECK: addss %xmm0, %xmm0 5 define float @fmul2_f32(float %x) { 6 %y = fmul float %x, 2.0 7 ret float %y 8 } 9 10 ; fmul 2.0, x -> fadd x, x for vectors. 11 12 ; CHECK-LABEL: fmul2_v4f32: 13 ; CHECK: addps %xmm0, %xmm0 14 ; CHECK-NEXT: retq 15 define <4 x float> @fmul2_v4f32(<4 x float> %x) { 16 %y = fmul <4 x float> %x, <float 2.0, float 2.0, float 2.0, float 2.0> 17 ret <4 x float> %y 18 } 19 20 ; CHECK-LABEL: constant_fold_fmul_v4f32: 21 ; CHECK: movaps 22 ; CHECK-NEXT: ret 23 define <4 x float> @constant_fold_fmul_v4f32(<4 x float> %x) { 24 %y = fmul <4 x float> <float 4.0, float 4.0, float 4.0, float 4.0>, <float 2.0, float 2.0, float 2.0, float 2.0> 25 ret <4 x float> %y 26 } 27 28 ; CHECK-LABEL: fmul0_v4f32: 29 ; CHECK: xorps %xmm0, %xmm0 30 ; CHECK-NEXT: retq 31 define <4 x float> @fmul0_v4f32(<4 x float> %x) #0 { 32 %y = fmul <4 x float> %x, <float 0.0, float 0.0, float 0.0, float 0.0> 33 ret <4 x float> %y 34 } 35 36 ; CHECK-LABEL: fmul_c2_c4_v4f32: 37 ; CHECK-NOT: addps 38 ; CHECK: mulps 39 ; CHECK-NOT: mulps 40 ; CHECK-NEXT: ret 41 define <4 x float> @fmul_c2_c4_v4f32(<4 x float> %x) #0 { 42 %y = fmul <4 x float> %x, <float 2.0, float 2.0, float 2.0, float 2.0> 43 %z = fmul <4 x float> %y, <float 4.0, float 4.0, float 4.0, float 4.0> 44 ret <4 x float> %z 45 } 46 47 ; CHECK-LABEL: fmul_c3_c4_v4f32: 48 ; CHECK-NOT: addps 49 ; CHECK: mulps 50 ; CHECK-NOT: mulps 51 ; CHECK-NEXT: ret 52 define <4 x float> @fmul_c3_c4_v4f32(<4 x float> %x) #0 { 53 %y = fmul <4 x float> %x, <float 3.0, float 3.0, float 3.0, float 3.0> 54 %z = fmul <4 x float> %y, <float 4.0, float 4.0, float 4.0, float 4.0> 55 ret <4 x float> %z 56 } 57 58 ; We should be able to pre-multiply the two constant vectors. 59 ; CHECK: float 5 60 ; CHECK: float 12 61 ; CHECK: float 21 62 ; CHECK: float 32 63 ; CHECK-LABEL: fmul_v4f32_two_consts_no_splat: 64 ; CHECK: mulps 65 ; CHECK-NOT: mulps 66 ; CHECK-NEXT: ret 67 define <4 x float> @fmul_v4f32_two_consts_no_splat(<4 x float> %x) #0 { 68 %y = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0> 69 %z = fmul <4 x float> %y, <float 5.0, float 6.0, float 7.0, float 8.0> 70 ret <4 x float> %z 71 } 72 73 ; Same as above, but reverse operands to make sure non-canonical form is also handled. 74 ; CHECK: float 5 75 ; CHECK: float 12 76 ; CHECK: float 21 77 ; CHECK: float 32 78 ; CHECK-LABEL: fmul_v4f32_two_consts_no_splat_non_canonical: 79 ; CHECK: mulps 80 ; CHECK-NOT: mulps 81 ; CHECK-NEXT: ret 82 define <4 x float> @fmul_v4f32_two_consts_no_splat_non_canonical(<4 x float> %x) #0 { 83 %y = fmul <4 x float> <float 1.0, float 2.0, float 3.0, float 4.0>, %x 84 %z = fmul <4 x float> <float 5.0, float 6.0, float 7.0, float 8.0>, %y 85 ret <4 x float> %z 86 } 87 88 ; More than one use of a constant multiply should not inhibit the optimization. 89 ; Instead of a chain of 2 dependent mults, this test will have 2 independent mults. 90 ; CHECK: float 6 91 ; CHECK: float 14 92 ; CHECK: float 24 93 ; CHECK: float 36 94 ; CHECK-LABEL: fmul_v4f32_two_consts_no_splat_multiple_use: 95 ; CHECK: mulps 96 ; CHECK: ret 97 define <4 x float> @fmul_v4f32_two_consts_no_splat_multiple_use(<4 x float> %x) #0 { 98 %y = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0> 99 %z = fmul <4 x float> %y, <float 5.0, float 6.0, float 7.0, float 8.0> 100 %a = fadd <4 x float> %y, %z 101 ret <4 x float> %a 102 } 103 104 ; PR22698 - http://llvm.org/bugs/show_bug.cgi?id=22698 105 ; Make sure that we don't infinite loop swapping constants back and forth. 106 107 define <4 x float> @PR22698_splats(<4 x float> %a) #0 { 108 %mul1 = fmul fast <4 x float> <float 2.0, float 2.0, float 2.0, float 2.0>, <float 3.0, float 3.0, float 3.0, float 3.0> 109 %mul2 = fmul fast <4 x float> <float 4.0, float 4.0, float 4.0, float 4.0>, %mul1 110 %mul3 = fmul fast <4 x float> %a, %mul2 111 ret <4 x float> %mul3 112 113 ; CHECK: float 24 114 ; CHECK: float 24 115 ; CHECK: float 24 116 ; CHECK: float 24 117 ; CHECK-LABEL: PR22698_splats: 118 ; CHECK: mulps 119 ; CHECK: ret 120 } 121 122 ; Same as above, but verify that non-splat vectors are handled correctly too. 123 define <4 x float> @PR22698_no_splats(<4 x float> %a) #0 { 124 %mul1 = fmul fast <4 x float> <float 1.0, float 2.0, float 3.0, float 4.0>, <float 5.0, float 6.0, float 7.0, float 8.0> 125 %mul2 = fmul fast <4 x float> <float 9.0, float 10.0, float 11.0, float 12.0>, %mul1 126 %mul3 = fmul fast <4 x float> %a, %mul2 127 ret <4 x float> %mul3 128 129 ; CHECK: float 45 130 ; CHECK: float 120 131 ; CHECK: float 231 132 ; CHECK: float 384 133 ; CHECK-LABEL: PR22698_no_splats: 134 ; CHECK: mulps 135 ; CHECK: ret 136 } 137 138 ; CHECK-LABEL: fmul_c2_c4_f32: 139 ; CHECK-NOT: addss 140 ; CHECK: mulss 141 ; CHECK-NOT: mulss 142 ; CHECK-NEXT: ret 143 define float @fmul_c2_c4_f32(float %x) #0 { 144 %y = fmul float %x, 2.0 145 %z = fmul float %y, 4.0 146 ret float %z 147 } 148 149 ; CHECK-LABEL: fmul_c3_c4_f32: 150 ; CHECK-NOT: addss 151 ; CHECK: mulss 152 ; CHECK-NOT: mulss 153 ; CHECK-NET: ret 154 define float @fmul_c3_c4_f32(float %x) #0 { 155 %y = fmul float %x, 3.0 156 %z = fmul float %y, 4.0 157 ret float %z 158 } 159 160 ; CHECK-LABEL: fmul_fneg_fneg_f32: 161 ; CHECK: mulss %xmm1, %xmm0 162 ; CHECK-NEXT: retq 163 define float @fmul_fneg_fneg_f32(float %x, float %y) { 164 %x.neg = fsub float -0.0, %x 165 %y.neg = fsub float -0.0, %y 166 %mul = fmul float %x.neg, %y.neg 167 ret float %mul 168 } 169 ; CHECK-LABEL: fmul_fneg_fneg_v4f32: 170 ; CHECK: mulps {{%xmm1|\(%rdx\)}}, %xmm0 171 ; CHECK-NEXT: retq 172 define <4 x float> @fmul_fneg_fneg_v4f32(<4 x float> %x, <4 x float> %y) { 173 %x.neg = fsub <4 x float> <float -0.0, float -0.0, float -0.0, float -0.0>, %x 174 %y.neg = fsub <4 x float> <float -0.0, float -0.0, float -0.0, float -0.0>, %y 175 %mul = fmul <4 x float> %x.neg, %y.neg 176 ret <4 x float> %mul 177 } 178 179 attributes #0 = { "less-precise-fpmad"="true" "no-infs-fp-math"="true" "no-nans-fp-math"="true" "unsafe-fp-math"="true" } 180
