Re: optimization/5968: flow.c ICE compiling 254.gap on ia64 with -O2 -funroll-loops

[law@redhat.com]

The following reply was made to PR optimization/5968; it has been noted by GNATS.

From: law@redhat.com
To: janis187@us.ibm.com
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: optimization/5968: flow.c ICE compiling 254.gap on ia64 with -O2 
 -funroll-loops
Date: Thu, 14 Mar 2002 15:44:08 -0700

 In message <20020314222241.8465.qmail@sources.redhat.com>, janis187@us.ibm.com 
 writes:
  > 
  > >Number:         5968
  > >Category:       optimization
  > >Synopsis:       flow.c ICE compiling 254.gap on ia64 with -O2 -funroll-loop
  > s
  > >Confidential:   no
  > >Severity:       serious
  > >Priority:       medium
  > >Responsible:    unassigned
  > >State:          open
  > >Class:          ice-on-legal-code
  > >Submitter-Id:   net
  > >Arrival-Date:   Thu Mar 14 14:26:01 PST 2002
  > >Closed-Date:
  > >Last-Modified:
  > >Originator:     Janis Johnson
  > >Release:        gcc version 3.1 20020314 (prerelease)
  > >Organization:
  > >Environment:
  > Itanium, Red Hat Linux release 7.1.94 (Roswell)
  > >Description:
  > GCC 3.1 prerelease gets an ICE compiling 254.gap from SPEC
  > CPU2000 with "-O2 -funroll-loops" on ia64-unknown-linux-gnu.
  > Compiler output is:
  > 
  > bug.c: In function `f':
  > bug.c:49: Attempt to delete prologue/epilogue insn:
  > (insn 553 551 555 (set (reg:DI 333 ar.lc)
  >         (reg:DI 34 r35)) -1 (nil)
  >     (nil))
  > bug.c:49: Internal compiler error in propagate_one_insn, at flow.c:1573
 There's a reasonable chance this patch from Jakub will fix your problem.
 It was approved by Richard this afternoon.
 
 > 	PR optimization/5891
 > 	* unroll.c (copy_loop_body) [CALL_INSN]: Copy SIBLING_CALL_P flag.
 
 jeff