[Bug tree-optimization/92860] [9/10/11/12 regression] Global flags affected by -O settings are clobbered by optimize attribute

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92860

--- Comment #82 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to rguenther@suse.de from comment #79)
> OK, so can you - in a -march=bdver2 built tree (that then fails) - produce
> options-save.ii (preprocessed source) and attach that?  

Done.

> Can you try whether you get past the failure point when you add -fno-tree-vectorize to just the options-save.o compilation?  

Flag doesn't help.

> Can you provide the -v output
> of the options-save.o compile so we get the exact cc1plus invocation?

Compile command is this:

/home/dcb/gcc/working/./gcc/xgcc -B/home/dcb/gcc/working/./gcc/
-B/home/dcb/gcc/results.20220104/x86_64-pc-linux-
gnu/bin/ -B/home/dcb/gcc/results.20220104/x86_64-pc-linux-gnu/lib/ -isystem
/home/dcb/gcc/results.20220104/x86_64
-pc-linux-gnu/include -isystem
/home/dcb/gcc/results.20220104/x86_64-pc-linux-gnu/sys-include   -fchecking=1
-g -
O3 -march=native -O2  -g -O3 -march=native -DIN_GCC    -W -Wall -Wno-narrowing
-Wwrite-strings -Wcast-qual -Wno-e
rror=format-diag -Wstrict-prototypes -Wmissing-prototypes
-Wno-error=format-diag -Wold-style-definition  -isystem
 ./include  -fpic -mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection -mshstk -g
-DIN_LIBGCC2 -fbuilding-libgcc -fn
o-stack-protector  -fpic -mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection
-mshstk -I. -I. -I../.././gcc -I../../
../trunk.git/libgcc -I../../../trunk.git/libgcc/.
-I../../../trunk.git/libgcc/../gcc -I../../../trunk.git/libgcc/
../include -I../../../trunk.git/libgcc/config/libbid
-DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS  -DUSE_TLS  -MT un
wind-dw2.o -MD -MP -MF unwind-dw2.dep -fexceptions -c -fno-tree-vectorize
../../../trunk.git/libgcc/unwind-dw2.c 
-fvisibility=hidden -DHIDE_EXPORTS 

cc1 command line is

 /home/dcb/gcc/working/./gcc/cc1 -quiet -v -I . -I . -I ../.././gcc -I
../../../trunk.git/libgcc -I ../../../trunk.git/libgcc/. -I
../../../trunk.git/libgcc/../gcc -I ../../../trunk.git/libgcc/../include -I
../../../trunk.git/libgcc/config/libbid -iprefix
/home/dcb/gcc/working/gcc/../lib/gcc/x86_64-pc-linux-gnu/12.0.0/ -isystem
/home/dcb/gcc/working/./gcc/include -isystem
/home/dcb/gcc/working/./gcc/include-fixed -MD unwind-dw2.d -MF unwind-dw2.dep
-MP -MT unwind-dw2.o -D IN_GCC -D USE_ELF_SYMVER -D IN_LIBGCC2 -D
USE_ELF_SYMVER -D ENABLE_DECIMAL_BID_FORMAT -D HAVE_CC_TLS -D USE_TLS -D
HIDE_EXPORTS -isystem
/home/dcb/gcc/results.20220104/x86_64-pc-linux-gnu/include -isystem
/home/dcb/gcc/results.20220104/x86_64-pc-linux-gnu/sys-include -isystem
./include ../../../trunk.git/libgcc/unwind-dw2.c -march=bdver2 -mmmx -mpopcnt
-msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mno-avx2 -msse4a -mfma4
-mxop -mfma -mno-avx512f -mbmi -mno-bmi2 -maes -mpclmul -mno-avx512vl
-mno-avx512bw -mno-avx512dq -mno-avx512cd -mno-avx512er -mno-avx512pf
-mno-avx512vbmi -mno-avx512ifma -mno-avx5124vnniw -mno-avx5124fmaps
-mno-avx512vpopcntdq -mno-avx512vbmi2 -mno-gfni -mno-vpclmulqdq -mno-avx512vnni
-mno-avx512bitalg -mno-avx512bf16 -mno-avx512vp2intersect -mno-3dnow -mno-adx
-mabm -mno-cldemote -mno-clflushopt -mno-clwb -mno-clzero -mcx16 -mno-enqcmd
-mf16c -mno-fsgsbase -mfxsr -mno-hle -msahf -mlwp -mlzcnt -mno-movbe
-mno-movdir64b -mno-movdiri -mno-mwaitx -mno-pconfig -mno-pku -mno-prefetchwt1
-mprfchw -mno-ptwrite -mno-rdpid -mno-rdrnd -mno-rdseed -mno-rtm -mno-serialize
-mno-sgx -mno-sha -mno-shstk -mtbm -mno-tsxldtrk -mno-vaes -mno-waitpkg
-mno-wbnoinvd -mxsave -mno-xsavec -mno-xsaveopt -mno-xsaves -mno-amx-tile
-mno-amx-int8 -mno-amx-bf16 -mno-uintr -mno-hreset -mno-kl -mno-widekl
-mno-avxvnni -mno-avx512fp16 --param l1-cache-size=16 --param
l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=bdver2 -quiet -dumpbase
unwind-dw2.c -dumpbase-ext .c -mlong-double-80 -mshstk -g -g -g -O3 -O2 -O3
-Wextra -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag
-Wstrict-prototypes -Wmissing-prototypes -Wno-error=format-diag
-Wold-style-definition -version -fchecking=1 -fcf-protection=full
-fbuilding-libgcc -fno-stack-protector -fpic -fcf-protection=full -fexceptions
-fvisibility=hidden