[Bug optimization/13992] New: Apparent vrsave problem with complex Altivec code and -O2

[tjw at omnigroup dot com]

Sorry for the slightly large test case, but due to the nature of the (apparent) bug, I haven't been able 
to make it significantly smaller.

../gcc/configure --prefix=/Users/bungi/Source/GNU/gcc/gcc-3.4/install --enable-
languages=c,c++,objc

Building the attached test case with:
$PREFIX/bin/g++ -O2 -g -Wall -fno-exceptions -maltivec -force_cpusubtype_ALL iterator_10.cpp 
-o iterator_10

When run, the output will have the line:

vBuckets: (0x7fffdead, 0x7fffdead, 0x7fffdead, 0x7fffdead)

implying to me that the vrsave register isn't getting stored correctly, or maybe some bad stack math 
is happening.  Making the test case smaller (removing the other logging or some of the vector 
operations) makes the 0x7fffdead disappear.

-- 
           Summary: Apparent vrsave problem with complex Altivec code and -
                    O2
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tjw at omnigroup dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: powerpc-apple-darwin7.2.0
  GCC host triplet: powerpc-apple-darwin7.2.0
GCC target triplet: powerpc-apple-darwin7.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13992