https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71330
Bug ID: 71330
Summary: Compile time regression
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: chrismorleygcc at gmail dot com
Target Milestone: ---
Created attachment 38589
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38589&action=edit
c++ source file
The attached code compiles in less than 1 sec in g++ 4.8.3, but ~15 minutes in
6.1.0.
$ time ~/dev/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/g++ -D_REENTRANT
-fPIC -Wall -Wextra -Wno-unused-parameter -Werror -Wno-unused-local-typedefs
-m64 -Woverloaded-virtual -Wno-deprecated -fvisibility-inlines-hidden
-fvisibility=hidden -std=c++11 -c -save-temps -v ostreamtest.cpp
Using built-in specs.
COLLECT_GCC=/home/cmm/dev/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/g++
Target: x86_64-pc-linux-gnu
Configured with: /home/test/gcc/gcc-6.1.0/configure --enable-threads
--enable-shared --enable-languages=c,c++,fortran --disable-multilib
--prefix=/usr/local/hudson/workspace/gnu_build_lin64_glibc2.10/linux-x86_64-2.10.1/gnu6.1.0
Thread model: posix
gcc version 6.1.0 (GCC)
COLLECT_GCC_OPTIONS='-D' '_REENTRANT' '-fPIC' '-Wall' '-Wextra'
'-Wno-unused-parameter' '-Werror' '-Wno-unused-local-typedefs' '-m64'
'-Woverloaded-virtual' '-Wno-deprecated' '-fvisibility-inlines-hidden'
'-fvisibility=hidden' '-std=c++11' '-c' '-save-temps' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.1.0/cc1plus
-E -quiet -v -iprefix
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/
-D_GNU_SOURCE -D _REENTRANT ostreamtest.cpp -m64 -mtune=generic -march=x86-64
-std=c++11 -Wall -Wextra -Wno-unused-parameter -Werror
-Wno-unused-local-typedefs -Woverloaded-virtual -Wno-deprecated -fPIC
-fvisibility-inlines-hidden -fvisibility=hidden -fpch-preprocess -o
ostreamtest.ii
ignoring nonexistent directory
"/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include"
ignoring duplicate directory
"/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0"
ignoring duplicate directory
"/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu"
ignoring duplicate directory
"/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward"
ignoring duplicate directory
"/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include"
ignoring duplicate directory
"/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed"
ignoring nonexistent directory
"/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed
/usr/local/include
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/../../include
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-D' '_REENTRANT' '-fPIC' '-Wall' '-Wextra'
'-Wno-unused-parameter' '-Werror' '-Wno-unused-local-typedefs' '-m64'
'-Woverloaded-virtual' '-Wno-deprecated' '-fvisibility-inlines-hidden'
'-fvisibility=hidden' '-std=c++11' '-c' '-save-temps' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.1.0/cc1plus
-fpreprocessed ostreamtest.ii -quiet -dumpbase ostreamtest.cpp -m64
-mtune=generic -march=x86-64 -auxbase ostreamtest -Wall -Wextra
-Wno-unused-parameter -Werror -Wno-unused-local-typedefs -Woverloaded-virtual
-Wno-deprecated -std=c++11 -version -fPIC -fvisibility-inlines-hidden
-fvisibility=hidden -o ostreamtest.s
GNU C++11 (GCC) version 6.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.1.0, GMP version 4.3.2, MPFR version 2.4.2,
MPC version 0.8.1, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++11 (GCC) version 6.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.1.0, GMP version 4.3.2, MPFR version 2.4.2,
MPC version 0.8.1, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 3ff6449bf7ff572eac77f0b9d1ffe35d
COLLECT_GCC_OPTIONS='-D' '_REENTRANT' '-fPIC' '-Wall' '-Wextra'
'-Wno-unused-parameter' '-Werror' '-Wno-unused-local-typedefs' '-m64'
'-Woverloaded-virtual' '-Wno-deprecated' '-fvisibility-inlines-hidden'
'-fvisibility=hidden' '-std=c++11' '-c' '-save-temps' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
as -v --64 -o ostreamtest.o ostreamtest.s
GNU assembler version 2.20.51.0.2 (x86_64-redhat-linux) using BFD version
version 2.20.51.0.2-5.43.el6 20100205
COMPILER_PATH=/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.1.0/:/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../libexec/gcc/
LIBRARY_PATH=/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/:/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/:/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/home/star/mirror/compilers/linux-x86_64-2.10.1/gnu6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-D' '_REENTRANT' '-fPIC' '-Wall' '-Wextra'
'-Wno-unused-parameter' '-Werror' '-Wno-unused-local-typedefs' '-m64'
'-Woverloaded-virtual' '-Wno-deprecated' '-fvisibility-inlines-hidden'
'-fvisibility=hidden' '-std=c++11' '-c' '-save-temps' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
real 15m37.103s
user 15m34.798s
sys 0m1.501s
