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Re: [PATCH] PR 32475 stack setup code being deleted.

From: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
To: "Seongbae Park" <seongbae dot park at gmail dot com>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>, Kenneth Zadeck <zadeck at naturalbridge dot com>
Date: Wed, 04 Jul 2007 08:53:19 +0200
Subject: Re: [PATCH] PR 32475 stack setup code being deleted.
References: <ab3a61990707031620g591f9328w55ce463ac7e03743@mail.gmail.com>
Reply-to: bonzini at gnu dot org

Seongbae Park wrote:

Attached is the patch to fix 32475
where the stack pointer becomes dead after epilogue generation,
due to the stack pointer restoration codein the epilogue.
The patch adds a df_ref of use of the stack pointer
for every write to the stack pointer - which essentially keeps
the stack pointer alive always.

So, why not munging the live bitmaps directly, so that when the frame pointer is live, the stack pointer is too?

Paolo

Follow-Ups:
- Re: [PATCH] PR 32475 stack setup code being deleted.
  - From: Seongbae Park (박성배, 朴成培)

References:
- [PATCH] PR 32475 stack setup code being deleted.
  - From: Seongbae Park (박성배, 朴成培)

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