llvm.org GIT mirror llvm / release_70 test / CodeGen / X86 / vec_unsafe-fp-math.ll
release_70

Tree @release_70 (Download .tar.gz)

vec_unsafe-fp-math.ll @release_70raw · history · blame

; 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
}