Major i386 testsuite regressions on trunk

[Jan Hubicka]

> Jan Hubicka writes:
> 
> > This is interesting.  All these tests passes for me and majority of the
> > code in patch you point out os not executed yet (it will be once STC
> > patch is ready for merging).  What error messages are you seeing?
> 
> Judging from the various testsuite results, this seems to happen only for
> the i386 configurations, not e.g. i686.
> 
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x08244c5d in ggc_alloc (size=12)
>     at /vol/gnu/src/gcc/gcc-dated/gcc/ggc-page.c:857
> (gdb) (gdb) where
> #0  0x08244c5d in ggc_alloc (size=12)
>     at /vol/gnu/src/gcc/gcc-dated/gcc/ggc-page.c:857
> #1  0x0814d0ad in gen_rtx_fmt_ei (code=SUBREG, mode=SImode, arg0=0x9699260, 
>     arg1=0) at genrtl.c:676
> #2  0x080f4589 in gen_rtx_SUBREG (mode=SImode, reg=0x9699260, offset=0)
>     at /vol/gnu/src/gcc/gcc-dated/gcc/emit-rtl.c:466
> #3  0x08213655 in simplify_subreg (outermode=SImode, op=0x9699260, 
>     innermode=QImode, byte=0)
>     at /vol/gnu/src/gcc/gcc-dated/gcc/simplify-rtx.c:2428
> #4  0x082139f5 in simplify_gen_subreg (outermode=SImode, op=0x9699260, 
>     innermode=QImode, byte=0)
>     at /vol/gnu/src/gcc/gcc-dated/gcc/simplify-rtx.c:2508
> #5  0x080f4dff in gen_lowpart_common (mode=SImode, x=0x9699260)
>     at /vol/gnu/src/gcc/gcc-dated/gcc/emit-rtl.c:865
> #6  0x080f4f06 in gen_lowpart (mode=SImode, x=0x9699260)
>     at /vol/gnu/src/gcc/gcc-dated/gcc/emit-rtl.c:1073
> #7  0x0818b29d in gen_split_1381 (operands=0x8403d20) at insn-emit.c:19328

This looks like bug in my splitter.  Thanks!

Honza