view test/CodeGen/X86/neg_fp.ll @ 52:c22698ecb2a9

modified CreateIdentifierInfo and create new function which was named 'CreateUniqueIdentifierInfo'.
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Wed, 15 Jan 2014 21:01:33 +0900 (2014-01-15)
parents 95c75e76d11b
children 803732b1fca8
line wrap: on
line source
; RUN: llc < %s -march=x86 -mattr=+sse4.1 -o %t
; RUN: grep xorps %t | count 1

; Test that when we don't -enable-unsafe-fp-math, we don't do the optimization
; -0 - (A - B) to (B - A) because A==B, -0 != 0

define float @negfp(float %a, float %b) {
entry:
	%sub = fsub float %a, %b		; <float> [#uses=1]
	%neg = fsub float -0.000000e+00, %sub		; <float> [#uses=1]
	ret float %neg
}