https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80318
Bug ID: 80318
Summary: GCC takes too much RAM and time compiling a template
file
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: benjamin.redelings at gmail dot com
Target Milestone: ---
Hi,
When compiling the attached file, GCC takes 2 minutes and about 6 gigs of RAM.
This is large compared to clang, which takes about 55 second and about 1.8 gigs
of RAM.
Here's the exactly compilation command:
g++-7 -std=c++14 -DHAVE_CONFIG_H -I. -I../../../master/src -I..
-I../../../master/include -I../../../master/src -isystem
../../../master/boost/include -ffast-math -DNDEBUG -DNDEBUG_DP -funroll-loops
-Wall -Wextra -Wno-sign-compare -Woverloaded-virtual -Wstrict-aliasing -pipe
-O3 -pedantic -I/usr/include/cairo -I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/pixman-1
-I/usr/include/freetype2 -I/usr/include/libpng16 -g -Wmisleading-indentation
-Wlogical-op -MT parser/parse.o -MD -MP -MF $depbase.Tpo -c -o parser/parse.o
../../../master/src/parser/parse.C
I've attached the preprocessed source below.
GCC version is.
$ g++-7 -v
Using built-in specs.
COLLECT_GCC=g++-7
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 7-20170316-1'
--with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --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-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.0.1 20170316 (experimental) [trunk revision 246203] (Debian
7-20170316-1)
