https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69613
Bug ID: 69613
Summary: [6 Regression] wrong code with -O and simple 128bit
arithmetics @ aarch64
Product: gcc
Version: 6.0
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: aarch64-unknown-linux-gnu
Created attachment 37548
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37548&action=edit
reduced testcase
Output:
$ aarch64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-233030-checking-yes-rtl-df-nographite-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/6.0.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=aarch64-unknown-linux-gnu
--with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld
--with-as=/usr/bin/aarch64-unknown-linux-gnu-as
--with-sysroot=/usr/aarch64-unknown-linux-gnu --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-233030-checking-yes-rtl-df-nographite-aarch64
Thread model: posix
gcc version 6.0.0 20160201 (experimental) (GCC)
$ aarch64-unknown-linux-gnu-gcc -O testcase.c
$ ./a.out
ffffffffffffffff8000000000000006
qemu: uncaught target signal 6 (Aborted) - core dumped
Aborted
Tested revisions:
r233030 - FAIL
5-branch r233025 - OK
4_9-branch r233024 - OK
4_8-branch r224828 - OK
