1; RUN: llc < %s -enable-unsafe-fp-math -mtriple=x86_64-apple-darwin -mcpu=corei7-avx | FileCheck %s 2 3 4; rdar://13126763 5; Expression "x + x*x" was mistakenly transformed into "x * 3.0f". 6 7define float @test1(float %x) { 8 %t1 = fmul fast float %x, %x 9 %t2 = fadd fast float %t1, %x 10 ret float %t2 11; CHECK: test1 12; CHECK: vaddss 13} 14 15; (x + x) + x => x * 3.0 16define float @test2(float %x) { 17 %t1 = fadd fast float %x, %x 18 %t2 = fadd fast float %t1, %x 19 ret float %t2 20; CHECK: .long 1077936128 21; CHECK: test2 22; CHECK: vmulss LCPI1_0(%rip), %xmm0, %xmm0 23} 24 25; x + (x + x) => x * 3.0 26define float @test3(float %x) { 27 %t1 = fadd fast float %x, %x 28 %t2 = fadd fast float %t1, %x 29 ret float %t2 30; CHECK: .long 1077936128 31; CHECK: test3 32; CHECK: vmulss LCPI2_0(%rip), %xmm0, %xmm0 33} 34 35; (y + x) + x != x * 3.0 36define float @test4(float %x, float %y) { 37 %t1 = fadd fast float %x, %y 38 %t2 = fadd fast float %t1, %x 39 ret float %t2 40; CHECK: test4 41; CHECK: vaddss 42} 43 44; rdar://13445387 45; "x + x + x => 3.0 * x" should be disabled after legalization because 46; Instruction-Selection doesn't know how to handle "3.0" 47; 48define float @test5() { 49 %mul.i.i151 = fmul <4 x float> zeroinitializer, zeroinitializer 50 %vecext.i8.i152 = extractelement <4 x float> %mul.i.i151, i32 1 51 %vecext1.i9.i153 = extractelement <4 x float> %mul.i.i151, i32 0 52 %add.i10.i154 = fadd float %vecext1.i9.i153, %vecext.i8.i152 53 %vecext.i7.i155 = extractelement <4 x float> %mul.i.i151, i32 2 54 %add.i.i156 = fadd float %vecext.i7.i155, %add.i10.i154 55 ret float %add.i.i156 56} 57