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Re: [Bug rtl-optimization/19078] [4.0 Regression] Poor quality code after loop unrolling.
- From: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- To: law at redhat dot com
- Cc: gcc-bugzilla at gcc dot gnu dot org, gcc at gcc dot gnu dot org
- Date: Thu, 10 Feb 05 13:18:16 EST
- Subject: Re: [Bug rtl-optimization/19078] [4.0 Regression] Poor quality code after loop unrolling.
It's been about a decade since I looked at cse vs autoincrements, so
the details have faded from memory. [The original context I found the
problem was in an attempt to run cse after reload. ]
My recollection is that we never used to allow autoincrements before CSE
with the exception of autoinc on SP.