llvm-project/llvm/test/Transforms/InstCombine/2008-07-16-fsub.ll

; RUN: opt < %s -instcombine -S | grep sub
; PR2553

define double @test(double %X) nounwind {
	; fsub of self can't be optimized away.
	%Y = fsub double %X, %X
	ret double %Y
}
Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. llvm-svn: 81537 2009-09-12 02:01:28 +08:00			`; RUN: opt < %s -instcombine -S \| grep sub`
Fix PR2553 llvm-svn: 53715 2008-07-17 14:07:20 +08:00			`; PR2553`

			`define double @test(double %X) nounwind {`
			`; fsub of self can't be optimized away.`
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 llvm-svn: 72897 2009-06-05 06:49:04 +08:00			`%Y = fsub double %X, %X`
Fix PR2553 llvm-svn: 53715 2008-07-17 14:07:20 +08:00			`ret double %Y`
			`}`