https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100623
Bug ID: 100623
Summary: [10/11/12 Regression] wrong code with -Os -fno-dce
-fno-defer-pop -fno-forward-propagate
-flive-range-shrinkage -fno-rerun-cse-after-loop
-mno-push-args
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 50819
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50819&action=edit
reduced testcase (from openssl sources)
Output:
$ x86_64-pc-linux-gnu-gcc -Os -fno-dce -fno-defer-pop -fno-forward-propagate
-flive-range-shrinkage -fno-rerun-cse-after-loop -mno-push-args testcase.c
$ ./a.out
Aborted
bn_add_words() is called with r == NULL
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r12-815-20210516001637-g1ba3f0ef546-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r12-815-20210516001637-g1ba3f0ef546-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.0 20210516 (experimental) (GCC)
