https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90095
Bug ID: 90095
Summary: [9 Regression] wrong code with -Os -fno-tree-bit-ccp
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: i686-pc-linux-gnu
Created attachment 46168
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46168&action=edit
reduced testcase
Output:
$ i686-pc-linux-gnu-gcc -Os -fno-tree-bit-ccp
$ ./a.out
Aborted
The multiplication does not overflow, but the generated code indicates it
overflows.
$ i686-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-i686/bin/i686-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-270358-checking-yes-rtl-df-extra-i686/bin/../libexec/gcc/i686-pc-linux-gnu/9.0.1/lto-wrapper
Target: i686-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 --with-sysroot=/usr/i686-pc-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=i686-pc-linux-gnu --with-ld=/usr/bin/i686-pc-linux-gnu-ld
--with-as=/usr/bin/i686-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-270358-checking-yes-rtl-df-extra-i686
Thread model: posix
gcc version 9.0.1 20190415 (experimental) (GCC)
