Bootstrap failure -- verify_ssa failed

[Andrew Pinski]

On Jun 28, 2005, at 2:38 PM, Ulrich Weigand wrote:

> Hello,
>
> with current GCC mainline bootstrap fails on s390(x)-ibm-linux
> during stage2 build with:
>
> ../../gcc-head/gcc/tree-ssa-operands.c: In function 
> 'finalize_ssa_uses':
> ../../gcc-head/gcc/tree-ssa-operands.c:570: error: Definition in block 
> 64 does not dominate use in block 13
> for SSA_NAME: TMT.628_22 in statement:
> TMT.628_41 = PHI <TMT.628_22(13), TMT.628_389(107)>;
> PHI argument
> TMT.628_22
> for PHI node
> TMT.628_41 = PHI <TMT.628_22(13), TMT.628_389(107)>;
> ../../gcc-head/gcc/tree-ssa-operands.c:570: internal compiler error: 
> verify_ssa failed.
>
> Before I start debugging, does this ring any bells?

Yes, this is the same failure on powerpc-darwin.
<http://gcc.gnu.org/ml/gcc-regression/2005-06/msg00090.html>.

It is also the same failure as I reported in
<http://gcc.gnu.org/ml/gcc/2005-05/msg01362.html> when I disabled 
forwprop
and the preprocessed source still is able to reproduce it with todays
clean source.

-- Pinski