[llvm-commits] [llvm] r73243 - in /llvm/trunk: lib/Transforms/Scalar/InstructionCombining.cpp test/Transforms/InstCombine/fsub-fsub.ll

[Eli Friedman]

On Fri, Jun 12, 2009 at 1:35 PM, Dale Johannesen<dalej at apple.com> wrote:
>
> On Jun 12, 2009, at 12:23 PMPDT, Dan Gohman wrote:
>
>> Author: djg
>> Date: Fri Jun 12 14:23:25 2009
>> New Revision: 73243
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=73243&view=rev
>> Log:
>> Don't do (x - (y - z)) --> (x + (z - y)) on floating-point types,
>> because
>> it may round differently. This fixes PR4374.
>
> Shouldn't we do this if UnsafeFPMath is on?

There is no such flag for instcombine.

-Eli