[Bug c/68701] New: "gcc -m32 -finstrument-functions -ffixed-ebp" produces internal compiler error

["henric at bergenwall dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68701

            Bug ID: 68701
           Summary: "gcc -m32 -finstrument-functions -ffixed-ebp" produces
                    internal compiler error
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: henric at bergenwall dot com
  Target Milestone: ---

Program to be compiled:
a.c:
int main(int argc, char* argv[])
{
  return argc-1;
}


Full compile command: gcc -m32 -finstrument-functions -ffixed-ebp a.c

I have tested to compile the program with the following versions of gcc:

gcc-4.3.4: Compilation is successful!
gcc-4.7.1: Compilation is successful!
gcc-4.8.1: Compilation is successful!
gcc-4.9.1: Compilation fails!
gcc-4.9.2: Compilation fails!
gcc-5.2.0: Compilation fails!


When the compilation is successful, the compiler gives no output.
When the compilation fails, the compiler produces the following output:

> gcc -m32 -finstrument-functions -ffixed-ebp a.c
a.c: In function 'main':
a.c:4:1: internal compiler error: in dwarf2out_frame_debug_expr, at
dwarf2cfi.c:1550
 }
 ^
0x66b891 dwarf2out_frame_debug_expr
        /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/gcc/dwarf2cfi.c:1548
0x66bda3 dwarf2out_frame_debug
        /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/gcc/dwarf2cfi.c:2043
0x66bda3 scan_insn_after
        /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/gcc/dwarf2cfi.c:2369
0x66db12 scan_trace
        /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/gcc/dwarf2cfi.c:2526
0x66e468 create_cfi_notes
        /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/gcc/dwarf2cfi.c:2565
0x66e468 execute_dwarf2_frame
        /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/gcc/dwarf2cfi.c:2925
0x66e468 execute
        /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/gcc/dwarf2cfi.c:3421
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.



Here is a more detailed description of the gcc-4.9.1 version:

> gcc -v
Using built-in specs.
COLLECT_GCC=/proj/epg-tools/gcc/4.9.1/bin/gcc
COLLECT_LTO_WRAPPER=/proj/epg-tools/gcc/4.9.1/libexec/gcc/x86_64-unknown-linux-gnu/4.9.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /tmp/gcc391/build-gcc-4.9.1/../gcc-4.9.1/configure
--prefix=/proj/epg-tools/gcc/4.9.1
Thread model: posix
gcc version 4.9.1 (GCC)