1 ; RUN: llc < %s -enable-unsafe-fp-math -mtriple=x86_64-unknown-unknown -mcpu=corei7 | FileCheck %s 2 3 ; Make sure that vectors get the same benefits as scalars when using unsafe-fp-math. 4 5 ; Subtracting zero is free. 6 define <4 x float> @vec_fsub_zero(<4 x float> %x) { 7 ; CHECK-LABEL: vec_fsub_zero: 8 ; CHECK-NOT: subps 9 ; CHECK-NOT: xorps 10 ; CHECK: retq 11 %sub = fsub <4 x float> %x, zeroinitializer 12 ret <4 x float> %sub 13 } 14 15 ; Negating doesn't require subtraction. 16 define <4 x float> @vec_fneg(<4 x float> %x) { 17 ; CHECK-LABEL: vec_fneg: 18 ; CHECK: xorps {{.*}}LCP{{.*}}, %xmm0 19 ; CHECK-NOT: subps 20 ; CHECK-NEXT: retq 21 %sub = fsub <4 x float> zeroinitializer, %x 22 ret <4 x float> %sub 23 } 24
