Fwd: C6X fails to build in FSF mainline

[Bernd Schmidt]

On 08/18/11 03:45, Andrew Pinski wrote:
> Forwarding this to the gcc list.  Also Adding RTH to the CC since he
> helped Bernd to get the dwarf2 parts working correctly.

>  You probably know this already.  The c6x-elf target fails to build
>  libgcc with the current FSF mainline sources:
> 
>  gcc/libgcc2.c: In function ‘__gnu_mulsc3’:
>  gcc/libgcc2.c:1928:1: internal compiler error: in scan_trace, at
> dwarf2cfi.c:2433
>  Please submit a full bug report,

Thanks Richard for fixing this (I've been on vacation).

There are some testsuite failures at -O3 in another part of dwarf2cfi,
which are caused by computed_jump_p returning 0 for the
indirect_jump_shadow pattern. There isn't really a sensible way to
represent this pattern in RTL, but we can take advantage of the fact
that computed_jump_p returns true for constants. I committed the
following patch.


Bernd
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