1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=instcombine -S | FileCheck %s 3 4target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 5 6; Tests folding constants from two similar selects that feed a add 7 8define float @test1a(i1 zeroext %arg) #0 { 9; CHECK-LABEL: @test1a( 10; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 6.000000e+00, float 1.500000e+01 11; CHECK-NEXT: ret float [[TMP2]] 12; 13 %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 14 %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 15 %tmp2 = fadd float %tmp, %tmp1 16 ret float %tmp2 17} 18 19; Tests folding multiple expression constants from similar selects that feed a adds 20 21define float @test1b(i1 zeroext %arg) #0 { 22; CHECK-LABEL: @test1b( 23; CHECK-NEXT: [[TMP5:%.*]] = select i1 [[ARG:%.*]], float 7.250000e+00, float 2.800000e+01 24; CHECK-NEXT: ret float [[TMP5]] 25; 26 %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 27 %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 28 %tmp2 = select i1 %arg, float 2.500000e-01, float 4.000000e+00 29 %tmp3 = fadd float %tmp, %tmp1 30 %tmp4 = fadd float %tmp2, %tmp1 31 %tmp5 = fadd float %tmp4, %tmp3 32 ret float %tmp5 33} 34 35; Tests folding constants from two similar selects that feed a sub 36 37define float @test2(i1 zeroext %arg) #0 { 38; CHECK-LABEL: @test2( 39; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 4.000000e+00, float -3.000000e+00 40; CHECK-NEXT: ret float [[TMP2]] 41; 42 %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 43 %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 44 %tmp2 = fsub float %tmp, %tmp1 45 ret float %tmp2 46} 47 48; Tests folding constants from two similar selects that feed a mul 49 50define float @test3(i1 zeroext %arg) #0 { 51; CHECK-LABEL: @test3( 52; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 5.000000e+00, float 5.400000e+01 53; CHECK-NEXT: ret float [[TMP2]] 54; 55 %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 56 %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 57 %tmp2 = fmul float %tmp, %tmp1 58 ret float %tmp2 59} 60 61declare void @use_float(float) 62 63; Tests folding constants if the selects have multiple uses but 64; we can fold away the binary op with a select. 65 66define float @test4(i1 zeroext %arg) #0 { 67; CHECK-LABEL: @test4( 68; CHECK-NEXT: [[TMP:%.*]] = select i1 [[ARG:%.*]], float 5.000000e+00, float 6.000000e+00 69; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG]], float 5.000000e+00, float 5.400000e+01 70; CHECK-NEXT: call void @use_float(float [[TMP]]) 71; CHECK-NEXT: ret float [[TMP2]] 72; 73 %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 74 %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 75 %tmp2 = fmul float %tmp, %tmp1 76 call void @use_float(float %tmp) 77 ret float %tmp2 78} 79 80; Tests not folding constants if we cannot fold away any of the selects. 81 82define float @test5(i1 zeroext %arg, float %div) { 83; CHECK-LABEL: @test5( 84; CHECK-NEXT: [[TMP:%.*]] = select i1 [[ARG:%.*]], float [[DIV:%.*]], float 5.000000e+00 85; CHECK-NEXT: [[MUL:%.*]] = fmul contract float [[TMP]], [[TMP]] 86; CHECK-NEXT: call void @use_float(float [[TMP]]) 87; CHECK-NEXT: ret float [[MUL]] 88; 89 %tmp = select i1 %arg, float %div, float 5.000000e+00 90 %mul = fmul contract float %tmp, %tmp 91 call void @use_float(float %tmp) 92 ret float %mul 93} 94 95define float @fmul_nnan_nsz(i1 %cond, float %val) { 96; CHECK-LABEL: @fmul_nnan_nsz( 97; CHECK-NEXT: ret float 0.000000e+00 98; 99 %lhs = select i1 %cond, float %val, float +0.0 100 %rhs = select i1 %cond, float -0.0, float %val 101 %mul = fmul nnan nsz float %lhs, %rhs 102 ret float %mul 103} 104 105define <2 x float> @fadd_nsz(<2 x i1> %cond, <2 x float> %val) { 106; CHECK-LABEL: @fadd_nsz( 107; CHECK-NEXT: ret <2 x float> [[VAL:%.*]] 108; 109 %lhs = select <2 x i1> %cond, <2 x float> %val, <2 x float> <float +0.0, float +0.0> 110 %rhs = select <2 x i1> %cond, <2 x float> <float +0.0, float +0.0>, <2 x float> %val 111 %add = fadd nsz <2 x float> %lhs, %rhs 112 ret <2 x float> %add 113} 114 115define double @fsub_nnan(i1 %cond, double %val, double %val2) { 116; CHECK-LABEL: @fsub_nnan( 117; CHECK-NEXT: [[TMP1:%.*]] = fadd nnan double [[VAL2:%.*]], -7.000000e+00 118; CHECK-NEXT: [[ADD:%.*]] = select nnan i1 [[COND:%.*]], double 0.000000e+00, double [[TMP1]] 119; CHECK-NEXT: ret double [[ADD]] 120; 121 %lhs = select i1 %cond, double %val, double %val2 122 %rhs = select i1 %cond, double %val, double 7.0 123 %add = fsub nnan double %lhs, %rhs 124 ret double %add 125} 126 127; TODO combine selects feeding fdiv like we do for fmul, fadd and fsub 128define double @fdiv_nnan_nsz(i1 %cond, double %val, double %val2) { 129; CHECK-LABEL: @fdiv_nnan_nsz( 130; CHECK-NEXT: [[LHS:%.*]] = select i1 [[COND:%.*]], double [[VAL2:%.*]], double 0.000000e+00 131; CHECK-NEXT: [[RHS:%.*]] = select i1 [[COND]], double 4.200000e+01, double [[VAL:%.*]] 132; CHECK-NEXT: [[ADD:%.*]] = fdiv nnan nsz double [[LHS]], [[RHS]] 133; CHECK-NEXT: ret double [[ADD]] 134; 135 %lhs = select i1 %cond, double %val2, double 0.0 136 %rhs = select i1 %cond, double 42.0, double %val 137 %add = fdiv nnan nsz double %lhs, %rhs 138 ret double %add 139} 140