[Bug debug/59575] [4.9 regression] ICE in maybe_record_trace_start, at dwarf2cfi.c:2239

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59575

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Ryan Mansfield from comment #9)
> (In reply to Jakub Jelinek from comment #8)
> > Created attachment 31934 [details]
> > gcc49-pr59575.patch
> > 
> > Untested fix.  Can somebody please test it?
> 
> The attached patch fixes the original ICE but introduces a new one.
> 
> 
>  -I../../../libgcc/../include  -DHAVE_CC_TLS  -o unwind-c.o -MT unwind-c.o
> -MD -MP -MF unwind-c.dep -fexceptions -c ../../../libgcc/unwind-c.c
> -fvisibility=hidden -DHIDE_EXPORTS
> ../../../libgcc/unwind-arm-common.inc:275:1: internal compiler error: in
> arm_unwind_emit_sequence, at config/arm/arm.c:28777
>  }
>  ^
> 0xbef8a5 arm_unwind_emit_sequence
> 	../../gcc/config/arm/arm.c:28777
> 0xbef8a5 arm_unwind_emit
> 	../../gcc/config/arm/arm.c:28999
> 0x708bde final_scan_insn(rtx_def*, _IO_FILE*, int, int, int*)
> 	../../gcc/final.c:2978
> 0x709585 final(rtx_def*, _IO_FILE*, int)
> 	../../gcc/final.c:2024
> 0x7099a9 rest_of_handle_final
> 	../../gcc/final.c:4438
> 0x7099a9 execute
> 	../../gcc/final.c:4513
> Please submit a full bug report,
> with preprocessed source if appropriate.

Can you please attach unwind-c.i ?  What exact options is it compiled with
(including whatever -march/float abi/etc. is needed to reproduce on
say --target armv5tel-unknown-linux-gnueabi configured gcc)?
I'm surprised it would affect arm unwind info, but perhaps I've made a bug in
the patch somewhere.