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Date: Sat, 23 Apr 2005 01:32:00 -0000
From: "nick at ilm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20050423013221.21169.nick@ilm.com>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug rtl-optimization/21169] New: [4.0 regression] ICE in reload_cse_simplify_operands with -fnon-call-exceptions -fPIC -O2
X-Bugzilla-Reason: CC
X-SW-Source: 2005-04/txt/msg03195.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

The following code compiles successfully under gcc-3.4.3 on amd64:

> cat bug.C 
float foo();

int _numTransitions;
int _offset;

void
bar(int &base)
{
    float tmp = foo();
    tmp -= (float)_offset;
    if (tmp < 0.0) tmp = 0.0;
    if (tmp > (float)(_numTransitions-1))
        tmp = (float)(_numTransitions-1);
    base = (int) tmp;
}


> /dept/rnd/vendor/gcc-4.0.0-amd64/bin/g++ -fnon-call-exceptions -fPIC -O2 -c
bug.C -o /dev/null
bug.C: In function 'void bar(int&)':
bug.C:15: error: insn does not satisfy its constraints:
(insn 67 35 36 0 (set (reg:SF 24 xmm3)
        (lt:SF (reg/v:SF 22 xmm1 [orig:60 tmp ] [60])
            (reg:SF 23 xmm2 [65]))) 487 {*sse_setccsf} (nil)
    (nil))
bug.C:15: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:391
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


> /dept/rnd/vendor/gcc-4.0.0-amd64/bin/g++ -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.0.0/configure
--prefix=/dept/rnd/vendor/gcc-4.0.0-amd64 --enable-threads --enable-languages=c,c++
Thread model: posix
gcc version 4.0.0

-- 
           Summary: [4.0 regression] ICE in reload_cse_simplify_operands
                    with -fnon-call-exceptions -fPIC -O2
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nick at ilm dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21169