https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67002
--- Comment #12 from John Paul Adrian Glaubitz <glaubitz at physik dot
fu-berlin.de> ---
Update:
Michael Karcher, who previously helped smashing some bugs in gcc for the SH
target, had a go at this and he discovered that the difference between stage2
and stage3 is the -gtoggle switch. And, indeed, triggering this switch is
responsible for the diff:
root@tirpitz:/home/mkarcher> diff -u s2/real-stage2.o s3/real-stage3.o
root@tirpitz:/home/mkarcher> diff -u s2/real-stage2.o s3-notoggle/real-stage3.o
Binary files s2/real-stage2.o and s3-notoggle/real-stage3.o differ
root@tirpitz:/home/mkarcher>
He generated a lot of debug output during build with "-fdump-tree-all" and
"-da":
gccroot=/home/glaubitz/gcc-5-test_5.2.1-12/gcc-5-5.2.1
gccbuild=$gccroot/build
$gccbuild/stage1-gcc/xg++ \
-B$gccbuild/stage1-gcc/ \
-B/usr/sh4-linux-gnu/bin/ -nostdinc++ \
-B$gccbuild/stage1-sh4-linux-gnu/libstdc++-v3/src/.libs \
-B$gccbuild/stage1-sh4-linux-gnu/libstdc++-v3/libsupc++/.libs \
-I$gccbuild/stage1-sh4-linux-gnu/libstdc++-v3/include/sh4-linux-gnu \
-I$gccbuild/stage1-sh4-linux-gnu/libstdc++-v3/include \
-I$gccroot/src/libstdc++-v3/libsupc++ \
-c -g -O2 -gtoggle -DIN_GCC \
-fno-exceptions -fno-rtti -fasynchronous-unwind-tables \
-W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wmissing-format-attribute -Woverloaded-virtual \
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings \
-DHAVE_CONFIG_H \
-I$gccbuild/stage2-gcc -I$gccroot/src/gcc -I$gccroot/src/include
-I$gccroot/src/libcpp/include \
-I$gccroot/src/libdecnumber -I$gccroot/src/libdecnumber/dpd
-I$gccbuild/libdecnumber \
-I$gccroot/src/libbacktrace \
-da -fdump-tree-all \
-o real-stage2.o $gccroot/src/gcc/real.c
I'm collecting all the dumped output now and will upload. I will follow up with
a download link quickly.
Adrian
