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Re: zero vector usagee (Was: Re: RFA: gcc.dg/simd-1.c fix for x86)
- From: Aldy Hernandez <aldyh at redhat dot com>
- To: Joern Rennecke <joern dot rennecke at superh dot com>
- Cc: Daniel Egger <degger at fhm dot edu>, GCC Patches <gcc-patches at gcc dot gnu dot org>, gcc at gcc dot gnu dot org
- Date: 08 Jul 2002 09:02:49 -0700
- Subject: Re: zero vector usagee (Was: Re: RFA: gcc.dg/simd-1.c fix for x86)
- References: <3D287F6F.E25C9323@superh.com> <1026066347.6648.2.camel@sonja.de.interearth.com> <3D296C3F.83381D5C@superh.com>
>>>>> "Joern" == Joern Rennecke <joern.rennecke@superh.com> writes:
> zero. We need to decide if using the zero vector is just optional,
No. It's not optional. Zeros must always be equivalent to
CONST0_RTX[MODE]. This is true across the board in gcc. Vector
constants are no different.
> I've used gen_rtx_CONST_VECTOR in some cases where it might
> generate a zero.
Uhh, your patches might be causing Daniel's problems.
Aldy