| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -enable-unsafe-fp-math -enable-no-signed-zeros-fp-math -mtriple=x86_64-unknown-unknown | FileCheck %s |
| |
| ; Make sure that vectors get the same benefits as scalars when using unsafe-fp-math. |
| |
| ; Subtracting zero is free. |
| define <4 x float> @vec_fsub_zero(<4 x float> %x) { |
| ; CHECK-LABEL: vec_fsub_zero: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: retq |
| %sub = fsub <4 x float> %x, zeroinitializer |
| ret <4 x float> %sub |
| } |
| |
| ; Negating doesn't require subtraction. |
| define <4 x float> @vec_fneg(<4 x float> %x) { |
| ; CHECK-LABEL: vec_fneg: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: xorps {{.*}}(%rip), %xmm0 |
| ; CHECK-NEXT: retq |
| %sub = fsub <4 x float> zeroinitializer, %x |
| ret <4 x float> %sub |
| } |
| |