llvm-6502/test/CodeGen/Generic/2008-02-25-NegateZero.ll

; RUN: llvm-as < %s | llc 
; rdar://5763967

define void @test() {
entry:
	%tmp98 = load float* null, align 4		; <float> [#uses=1]
	%tmp106 = load float* null, align 4		; <float> [#uses=1]
	%tmp113 = fadd float %tmp98, %tmp106		; <float> [#uses=1]
	%tmp119 = fsub float %tmp113, 0.000000e+00		; <float> [#uses=1]
	call void (i32, ...)* @foo( i32 0, float 0.000000e+00, float %tmp119 ) nounwind 
	ret void
}

declare void @foo(i32, ...)
Fix isNegatibleForFree to not return true for ConstantFP nodes after legalize. Just because a constant is legal (e.g. 0.0 in SSE) doesn't mean that its negated value is legal (-0.0). We could make this stronger by checking to see if the negated constant is actually legal post negation, but it doesn't seem like a big deal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47591 91177308-0d34-0410-b5e6-96231b3b80d8 2008-02-26 07:04:54 +00:00			`; RUN: llvm-as < %s \| llc`
			`; rdar://5763967`

			`define void @test() {`
			`entry:`
			`%tmp98 = load float* null, align 4 ; <float> [#uses=1]`
			`%tmp106 = load float* null, align 4 ; <float> [#uses=1]`
Split the Add, Sub, and Mul instruction opcodes into separate integer and floating-point opcodes, introducing FAdd, FSub, and FMul. For now, the AsmParser, BitcodeReader, and IRBuilder all preserve backwards compatability, and the Core LLVM APIs preserve backwards compatibility for IR producers. Most front-ends won't need to change immediately. This implements the first step of the plan outlined here: http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72897 91177308-0d34-0410-b5e6-96231b3b80d8 2009-06-04 22:49:04 +00:00			`%tmp113 = fadd float %tmp98, %tmp106 ; <float> [#uses=1]`
			`%tmp119 = fsub float %tmp113, 0.000000e+00 ; <float> [#uses=1]`
Fix isNegatibleForFree to not return true for ConstantFP nodes after legalize. Just because a constant is legal (e.g. 0.0 in SSE) doesn't mean that its negated value is legal (-0.0). We could make this stronger by checking to see if the negated constant is actually legal post negation, but it doesn't seem like a big deal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47591 91177308-0d34-0410-b5e6-96231b3b80d8 2008-02-26 07:04:54 +00:00			`call void (i32, ...)* @foo( i32 0, float 0.000000e+00, float %tmp119 ) nounwind`
			`ret void`
			`}`

			`declare void @foo(i32, ...)`