[Bug c/80088] New: ICE: declaration and definition of function with __attribute__((target("thumb"))) and inlined assembler, with debug symbols enabled

["wojtek.golf at interia dot pl" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80088

            Bug ID: 80088
           Summary: ICE: declaration and definition of function with
                    __attribute__((target("thumb"))) and inlined
                    assembler, with debug symbols enabled
           Product: gcc
           Version: 5.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: wojtek.golf at interia dot pl
  Target Milestone: ---

Snippet below, when compiled with arm hard-float crosscompiler, causes ICE.

void
__attribute(( target("thumb") ))
bar();

int main()
{
    return 0;
}

void bar()
{
    unsigned int foo;
    asm ("mcr p15, 0, %0, c13, c0, 3" : : "r" (foo) );
}

1. commenting out main function make the problem disappears
2. when the definition is moved before main the problem disappears
3. when the target attribute is changed to arm the problem disappears
4. when the inline assembler is replaced with asm(" mcr     15, 0, r3, cr13,
cr0, {3}"); the problem disappears


Invocation command:
arm-linux-gnueabihf-gcc -g -marm ice3.c -c

1. -g and -marm flags are mandatory, either one of them missing make the
problem disappear
2. -c can be replaced with -S

The compiler crashes with the following output to the console:

$ arm-linux-gnueabihf-gcc -g -marm ice3.c -S
ice3.c: In function ‘bar’:
ice3.c:16:1: internal compiler error: in dwarf2out_frame_debug_adjust_cfa, at
dwarf2cfi.c:1169
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.

Environment:
OS: Ubuntu 16.04.04

$ uname -a
Linux wojtek-dell 4.4.0-59-generic #80-Ubuntu SMP Fri Jan 6 17:47:47 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux

$ $ arm-linux-gnueabihf-gcc --version
arm-linux-gnueabihf-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.