llvm/test/CodeGen/X86/vec_unsafe-fp-math.ll


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; 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
}