On Wed, Apr 25, 2007 at 06:08:47PM -0700, Fu, Chao-Ying wrote:
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of
> > H. J. Lu
> > Sent: Wednesday, April 25, 2007 2:02 PM
> > To: Steve Ellcey
> > Cc: [EMAIL PROTECTED]; gcc@gcc.gnu.org
> > Subject: Re: Problem with patch for PR tree-optimization/29789
> >
> >
> > On Wed, Apr 25, 2007 at 01:55:14PM -0700, Steve Ellcey wrote:
> > > Richard,
> > >
> > > Has anyone reported any problems with your
> > tree-ssa-loop-im.c patch that
> > > fixes PR tree-optimization/29789? I have been looking at a
> > failure with
> > > the SPECfp2000 173.applu test. I found that if I compile it with
> > > version r124041 of the GCC gfortran compiler it works but
> > if I compile
> > > it with version r124042 it fails. The difference between the two is
> > > your checkin:
> > >
> >
> > See
> >
> > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31703
> >
> >
> > H.J.
> >
>
> I got a test that fails for mips32r2-elf. Is this fail from the same issue?
I think it is the same issue.
H.J.
---
>
> (bug74.c)
> void test (long long mod, long long temp)
> {
> while (1)
> {
> int leftmost = (mod >> 1) & 1;
> mod = mod << 1;
> if (leftmost)
> mod = temp;
> }
> }
>
> # mipsisa32r2-elf-gcc -S bug74.c -O -fdump-tree-all
> bug74.c: In function â?~testâ?T:
> bug74.c:5: internal compiler error: in simplify_subreg, at simplify-rtx.c:4677
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <URL:http://gcc.gnu.org/bugs.html> for instructions.
>
> (bug74.c.119t.blocks)
>
> ;; Function test (test)
>
> test (mod, temp)
> {
> long long int mod.25;
> int leftmost;
>
> <L3>:;
>
> <L4>:;
> mod.25 = mod;
>
> <L6>:;
> leftmost = mod.25 & 2;
> mod.25 = mod.25 << 1;
> mod = temp;
> if (leftmost != 0) goto <L4>; else goto <L6>;
>
> }
>
> NOTE that there should be a type cast to int for this statement
> "leftmost = mod.25 & 2;".
>
