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optimization/10280: __builtin_frame_address() broken in ia64 optimizer

From: ahs3 at fc dot hp dot com
To: gcc-gnats at gcc dot gnu dot org
Cc: bobm at fc dot hp dot com
Date: 31 Mar 2003 18:24:54 -0000
Subject: optimization/10280: __builtin_frame_address() broken in ia64 optimizer
Reply-to: ahs3 at fc dot hp dot com

>Number:         10280
>Category:       optimization
>Synopsis:       __builtin_frame_address() broken in ia64 optimizer
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 31 18:26:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Al Stone
>Release:        gcc-2.96 or gcc 3.2.3
>Organization:
>Environment:
Red Hat Advanced Server, or Debian GNU/Linux, on an ia64 processor.
>Description:
It appears that __builting_frame_address() is broken in the presence of the optimizer on ia64; this was found when compiling Linux kernel code that caused a stack overflow.  When one looks at the assembler generated, it appears very odd that the alloc increases the register stack by 80 entries.
>How-To-Repeat:
Compile without -O and the sample works properly; compile with  -O and it fails.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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