[PATCH] Fix PR tree-optimization/77654

[Doug Gilmore]

> From: Christophe Lyon [christophe.lyon@linaro.org]
> Sent: Thursday, September 29, 2016 12:17 PM
> To: Matthew Fortune
> Cc: Doug Gilmore; Richard Biener; gcc-patches@gcc.gnu.org; rguenth@gcc.gnu.org
> Subject: Re: [PATCH] Fix PR tree-optimization/77654
> ...
> 
> Since this commit, I've noticed ICE on arm target:
> FAIL: gcc.dg/params/blocksort-part.c -O3 --param prefetch-latency=0
> (internal compiler error)
> FAIL: gcc.dg/params/blocksort-part.c -O3 --param prefetch-latency=0
> (test for excess errors)
> Excess errors:
> /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.dg/params/blocksort-part.c:116:6:
> internal compiler error: in duplicate
> _ssa_name_ptr_info, at tree-ssanames.c:630
> 0xd5a972 duplicate_ssa_name_ptr_info(tree_node*, ptr_info_def*)
>         /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/tree-ssanames.c:630
> 0xcac0e0 issue_prefetch_ref
>         /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/tree-ssa-loop-prefetch.c:1168
> 0xcad89f issue_prefetches
>         /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/tree-ssa-loop-prefetch.c:1195
> 0xcad89f loop_prefetch_arrays
>         /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/tree-ssa-loop-prefetch.c:1928
> 0xcae722 tree_ssa_prefetch_arrays()
>         /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/tree-ssa-loop-prefetch.c:1992
> 
> 
> --target arm-none-linux-gnueabihf --with-cpu=cortex-a9
> --wihth-fpu=neon-fp16 --with-mode=arm
> 
> I'm not sure the cpu/fpu/mode settings are mandatory but at least in this case
> the compiler ICEs.
> 
> Christophe
I'll look into this.

Doug
> 
> 
> > (Fixed whitespace/tab issue in the code and incorrect file in changelog)
> >
> > I can't progress the bug status. Who does that normally?
> >
> > Matthew