https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106041
Bug ID: 106041
Summary: Long/infinite compile time for Arm SIMD -O1 or -O2 but
not -O0
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jan.wassenberg at gmail dot com
Target Milestone: ---
Created attachment 53179
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53179&action=edit
Zipped preprocessed source
Long (overnight) compile time for Arm target, vs 28sec for Clang.
Repro: time aarch64-linux-gnu-g++-12 -O2 memory_test.cc.ii
Output: none, not even with -ftime-report. Commenting out the contents of
TestLoadStoreInterleaved3 and TestLoadStoreInterleaved4 avoids the problem.
-v output:
Using built-in specs.
COLLECT_GCC=aarch64-linux-gnu-g++-12
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/aarch64-linux-gnu/12/lto-wrapper
Target: aarch64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 12-20220302-1'
--with-bugurl=file:///usr/share/doc/gcc-12/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-12 --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-libquadmath --disable-libquadmath-support --enable-plugin
--enable-default-pie --with-system-zlib --enable-libphobos-checking=release
--without-target-system-zlib --enable-multiarch --enable-fix-cortex-a53-843419
--disable-werror --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=aarch64-linux-gnu
--program-prefix=aarch64-linux-gnu- --includedir=/usr/aarch64-linux-gnu/include
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220302 (experimental) [master r12-7448-g58394373a70]
(Debian 12-20220302-1)
