[Bug middle-end/84823] [6 Regression] x86 LRA hang on valid code (no ICE) with -fno-omit-frame-pointer

[awilfox at adelielinux dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84823

--- Comment #3 from A. Wilcox (awilfox) <awilfox at adelielinux dot org> ---
Tried disabling every single optimisation that was enabled by default in
sequence, yielding the following results:


% for i in $(cat gcc-options); do timeout 10 gcc -I.. -I.. -O2 -ggdb
-march=pentium-mmx -mtune=pentium-m -fno-omit-frame-pointer -DHAVE_CONFIG_H -O2
-ggdb -march=pentium-mmx -mtune=pentium-m -fno-omit-frame-pointer -g -g -ggdb3
-Wall -W   -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes  
-Wpointer-arith -Wbad-function-cast -Wnested-externs  -MT ecc-mul-a-test.o -MD
-MP -MF ecc-mul-a-test.o.d -c ecc-mul-a-test.c $i && printf "$i fixed it\n";
done

-fno-guess-branch-probability fixed it
-fno-inline fixed it
-fno-tree-ter fixed it


I don't know if this helps any or not.