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optimization/5891: ICE compiling SPEC fp test with -funroll-loops on ia64

From: janis187 at us dot ibm dot com
To: gcc-gnats at gcc dot gnu dot org
Date: 8 Mar 2002 20:52:25 -0000
Subject: optimization/5891: ICE compiling SPEC fp test with -funroll-loops on ia64
Reply-to: janis187 at us dot ibm dot com


>Number:         5891
>Category:       optimization
>Synopsis:       ICE compiling SPEC fp test with -funroll-loops on ia64
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Fri Mar 08 12:56:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Janis Johnson
>Release:        unknown-1.0
>Organization:
>Environment:
Itanium, Red Hat Linux release 7.1.94 (Roswell)
>Description:
Compiling the SPEC CPU2000 floating point test 200.sixtrack
with "-O2 -funroll-loops" on ia64-unknown-linux-gnu results
in an ICE:

bug.f: In subroutine `eig66':
bug.f:69: Attempt to delete prologue/epilogue insn:
(insn 1643 1641 1645 (set (reg:DI 333 ar.lc)
        (reg:DI 41 r46)) -1 (nil)
    (nil))
bug.f:69: Internal compiler error in propagate_one_insn, at flow.c:1573

This is a regression from GCC 3.0.4.

Compile the test case with "-O2 -funroll-loops" on ia64.
IBM's SPEC representative got permission from SPEC for me
to send in the test case.
>How-To-Repeat:
Compile the test case with "-O2 -funroll-loops" on ia64.
IBM's SPEC representative got permission from SPEC for me
to send in the test case.
>Fix:
Unknown
>Release-Note:
>Audit-Trail:
>Unformatted:
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