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Re: RFA: patch for register pressure sensitive insn scheduling

From: Paolo Bonzini <bonzini at gnu dot org>
To: Vladimir Makarov <vmakarov at redhat dot com>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Tue, 01 Sep 2009 09:02:59 +0200
Subject: Re: RFA: patch for register pressure sensitive insn scheduling
References: <4A9C7847.8040603@redhat.com>

Somebody could ask me why register pressure sensitive insn
scheduling is not default.

What about making it the default only when loop unrolling is on? What is the performance improvement for "-O2 -funroll-loops" vs. "-O2 -funroll-loops -fschedule-insns"?

Paolo

Follow-Ups:
- Re: RFA: patch for register pressure sensitive insn scheduling
  - From: Andi Kleen

References:
- RFA: patch for register pressure sensitive insn scheduling
  - From: Vladimir Makarov

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