[Bug debug/63741] lm32 ICE in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1677

[Bug debug/63741] lm32 ICE in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1677

[joel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63741

Joel Sherrill <joel at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.9.1

--- Comment #1 from Joel Sherrill <joel at gcc dot gnu.org> ---
Confirmed in lm32-rtems4.11-gcc (GCC) 4.9.2 20141028 (prerelease)

But now at:

$ ~/test-gcc/install-head/bin/lm32-rtems4.11-gcc -O2 -g -c /tmp/fastlz.c 
In file included from
../../../../../../rtems/c/src/../../cpukit/libdl/fastlz.c:113:0:
../../../../../../rtems/c/src/../../cpukit/libdl/fastlz.c: In function
'fastlz1_compress':
../../../../../../rtems/c/src/../../cpukit/libdl/fastlz.c:418:1: internal
compiler error: in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1675
0x52ddb0 dwarf2out_frame_debug_expr
    ../../gcc/gcc/dwarf2cfi.c:1675
0x52e3ac dwarf2out_frame_debug
    ../../gcc/gcc/dwarf2cfi.c:2043
0x52e3ac scan_insn_after
    ../../gcc/gcc/dwarf2cfi.c:2369
0x52fc37 scan_trace
    ../../gcc/gcc/dwarf2cfi.c:2526
0x530690 create_cfi_notes
    ../../gcc/gcc/dwarf2cfi.c:2565
0x530690 execute_dwarf2_frame
    ../../gcc/gcc/dwarf2cfi.c:2925
0x530690 execute
    ../../gcc/gcc/dwarf2cfi.c:3421
Please submit a full bug report,
with preprocessed source if appropriate.

[Bug debug/63741] lm32 ICE in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1677

[joel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63741

--- Comment #2 from Joel Sherrill <joel at gcc dot gnu.org> ---
Broken on head as well.

lm32-rtems4.11-gcc (GCC) 5.0.0 20141104 (experimental)

[Bug debug/63741] lm32 ICE in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1677

[joel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63741

--- Comment #3 from Joel Sherrill <joel at gcc dot gnu.org> ---
Added the dwarf maintainers hoping to get an answer. From an RTEMS perspective,
the lm32 is not usable. Both 4.9 and the head are broken. Hoping you two have
an idea. Happy to help since this is a cross target.

[Bug debug/63741] lm32 ICE in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1677

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63741

--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #4)

> is not the correct way to set /f flags to all insn of the generated sequence.

Please see how mips/mips.c annotates expanded sequences using
mips_set_frame_expr, especially stack pointer adjustment description in mips.c,
around line 11620.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd681

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
.

[Bug debug/63741] lm32 ICE in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1677

[joel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63741

--- Comment #6 from Joel Sherrill <joel at gcc dot gnu.org> ---
I am not an expert on the machine descriptions or the lm32. If someone wants to
propose a patch, I am happy to test it.

[Bug debug/63741] lm32 ICE in dwarf2out_frame_debug_expr, at dwarf2cfi.c:1677

[joel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63741

--- Comment #7 from Joel Sherrill <joel at gcc dot gnu.org> ---
I added Jon Beniston who did the initial port and Sebastien Bourdeauducq who is
listed as the lm32 maintainer but hasn't committed since 2011. I hope one of
them can help out here.