| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; Tests folding constants from two similar selects that feed a add |
| |
| define float @test1a(i1 zeroext %arg) #0 { |
| ; CHECK-LABEL: @test1a( |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 6.000000e+00, float 1.500000e+01 |
| ; CHECK-NEXT: ret float [[TMP2]] |
| ; |
| %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 |
| %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 |
| %tmp2 = fadd float %tmp, %tmp1 |
| ret float %tmp2 |
| } |
| |
| ; Tests folding multiple expression constants from similar selects that feed a adds |
| |
| define float @test1b(i1 zeroext %arg) #0 { |
| ; CHECK-LABEL: @test1b( |
| ; CHECK-NEXT: [[TMP5:%.*]] = select i1 [[ARG:%.*]], float 7.250000e+00, float 2.800000e+01 |
| ; CHECK-NEXT: ret float [[TMP5]] |
| ; |
| %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 |
| %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 |
| %tmp2 = select i1 %arg, float 2.500000e-01, float 4.000000e+00 |
| %tmp3 = fadd float %tmp, %tmp1 |
| %tmp4 = fadd float %tmp2, %tmp1 |
| %tmp5 = fadd float %tmp4, %tmp3 |
| ret float %tmp5 |
| } |
| |
| ; Tests folding constants from two similar selects that feed a sub |
| |
| define float @test2(i1 zeroext %arg) #0 { |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 4.000000e+00, float -3.000000e+00 |
| ; CHECK-NEXT: ret float [[TMP2]] |
| ; |
| %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 |
| %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 |
| %tmp2 = fsub float %tmp, %tmp1 |
| ret float %tmp2 |
| } |
| |
| ; Tests folding constants from two similar selects that feed a mul |
| |
| define float @test3(i1 zeroext %arg) #0 { |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG:%.*]], float 5.000000e+00, float 5.400000e+01 |
| ; CHECK-NEXT: ret float [[TMP2]] |
| ; |
| %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 |
| %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 |
| %tmp2 = fmul float %tmp, %tmp1 |
| ret float %tmp2 |
| } |
| |
| declare void @use_float(float) |
| |
| ; Tests folding constants if the selects have multiple uses but |
| ; we can fold away the binary op with a select. |
| |
| define float @test4(i1 zeroext %arg) #0 { |
| ; CHECK-LABEL: @test4( |
| ; CHECK-NEXT: [[TMP:%.*]] = select i1 [[ARG:%.*]], float 5.000000e+00, float 6.000000e+00 |
| ; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[ARG]], float 5.000000e+00, float 5.400000e+01 |
| ; CHECK-NEXT: call void @use_float(float [[TMP]]) |
| ; CHECK-NEXT: ret float [[TMP2]] |
| ; |
| %tmp = select i1 %arg, float 5.000000e+00, float 6.000000e+00 |
| %tmp1 = select i1 %arg, float 1.000000e+00, float 9.000000e+00 |
| %tmp2 = fmul float %tmp, %tmp1 |
| call void @use_float(float %tmp) |
| ret float %tmp2 |
| } |
| |
| ; Tests not folding constants if we cannot fold away any of the selects. |
| |
| define float @test5(i1 zeroext %arg, float %div) { |
| ; CHECK-LABEL: @test5( |
| ; CHECK-NEXT: [[TMP:%.*]] = select i1 [[ARG:%.*]], float [[DIV:%.*]], float 5.000000e+00 |
| ; CHECK-NEXT: [[MUL:%.*]] = fmul contract float [[TMP]], [[TMP]] |
| ; CHECK-NEXT: call void @use_float(float [[TMP]]) |
| ; CHECK-NEXT: ret float [[MUL]] |
| ; |
| %tmp = select i1 %arg, float %div, float 5.000000e+00 |
| %mul = fmul contract float %tmp, %tmp |
| call void @use_float(float %tmp) |
| ret float %mul |
| } |
| |