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Re: SSA + autoinc segfaults

To: Richard Henderson <rth at cygnus dot com>
Subject: Re: SSA + autoinc segfaults
From: Michael Hayes <m dot hayes at elec dot canterbury dot ac dot nz>
Date: Wed, 19 Apr 2000 19:01:26 +1200 (NZST)
Cc: Michael Hayes <m dot hayes at elec dot canterbury dot ac dot nz>, gcc-bugs at gcc dot gnu dot org
References: <14587.59910.622961.316540@ongaonga.elec.canterbury.ac.nz><20000418230352.B25197@cygnus.com>

Richard Henderson writes:
 > On Tue, Apr 18, 2000 at 04:52:22PM +1200, Michael Hayes wrote:
 > > I'm getting a segfault when using -fssa.  NULL is being passed as the
 > > regset for a register autoincremented.
 > 
 > Where did the autoinc come from?  Is it a stack push thing?

Ah, good question.  The problem appears that convert_to_ssa calls
life_analysis and this generates the autoincrement.  Admittedly, I do
have more aggressive code in my tree for finding autoincrements but
the PROP_AUTOINC flag is set.  I suggest that we add another arg to
life_analysis to enable the finding of autoincrements.

Michael.

Follow-Ups:
- Re: SSA + autoinc segfaults
  - From: Richard Henderson

References:
- SSA + autoinc segfaults
  - From: Michael Hayes
- Re: SSA + autoinc segfaults
  - From: Richard Henderson

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