[Bug c/77365] Wrong result with -fcaller-saves on i386

["olebole at debian dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77365

--- Comment #4 from Ole Streicher <olebole at debian dot org> ---
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/6/lto-wrapper
Target: i686-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 6.2.0-1'
--with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs
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--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-i386
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--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu
--target=i686-linux-gnu
Thread model: posix
gcc version 6.2.0 20160822 (Debian 6.2.0-1) 
COLLECT_GCC_OPTIONS='-v' '-O2' '-o' 'm' '-mtune=generic' '-march=i686'
 /usr/lib/gcc/i686-linux-gnu/6/cc1 -quiet -v -imultiarch i386-linux-gnu m.c
-quiet -dumpbase m.c -mtune=generic -march=i686 -auxbase m -O2 -version -o
/tmp/ccUvhfOb.s
GNU C11 (Debian 6.2.0-1) version 6.2.0 20160822 (i686-linux-gnu)
        compiled by GNU C version 6.2.0 20160822, GMP version 6.1.1, MPFR
version 3.1.4-p2, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/local/include/i386-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/i686-linux-gnu/6/../../../../i686-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/i686-linux-gnu/6/include
 /usr/local/include
 /usr/lib/gcc/i686-linux-gnu/6/include-fixed
 /usr/include/i386-linux-gnu
 /usr/include
End of search list.
GNU C11 (Debian 6.2.0-1) version 6.2.0 20160822 (i686-linux-gnu)
        compiled by GNU C version 6.2.0 20160822, GMP version 6.1.1, MPFR
version 3.1.4-p2, MPC version 1.0.3, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 1e4bebb54de70f35ce8dd91f33b3d708
COLLECT_GCC_OPTIONS='-v' '-O2' '-o' 'm' '-mtune=generic' '-march=i686'
 as -v --32 -o /tmp/ccZBW7WX.o /tmp/ccUvhfOb.s
GNU assembler version 2.27 (i686-linux-gnu) using BFD version (GNU Binutils for
Debian) 2.27
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/lib/ld-linux.so.2 -o m
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/usr/lib/gcc/i686-linux-gnu/6/crtend.o
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COLLECT_GCC_OPTIONS='-v' '-O2' '-o' 'm' '-mtune=generic' '-march=i686'