https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110396
Bug ID: 110396
Summary: Compile-time hog with -O2 and -O3
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: luydorarko at vusra dot com
Target Milestone: ---
Created attachment 55397
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55397&action=edit
Preprocessed file created by `-O2 -save-temps`
Compile time hog behavior can be reproduced with:
```
g++ -O2 tmp.cpp
```
Also same behavior with `-O3`.
Compiler takes far too long (more than one hour in one case) and was killed
after a while.
Output of `g++ -v`:
```
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/13.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure
--enable-languages=ada,c,c++,d,fortran,go,lto,objc,obj-c++ --enable-bootstrap
--prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--with-build-config=bootstrap-lto --with-linker-hash-style=gnu
--with-system-zlib --enable-__cxa_atexit --enable-cet=auto
--enable-checking=release --enable-clocale=gnu --enable-default-pie
--enable-default-ssp --enable-gnu-indirect-function --enable-gnu-unique-object
--enable-libstdcxx-backtrace --enable-link-serialization=1
--enable-linker-build-id --enable-lto --enable-multilib --enable-plugin
--enable-shared --enable-threads=posix --disable-libssp --disable-libstdcxx-pch
--disable-werror
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.1.1 20230429 (GCC)
```
Attachment: a-tmp.ii file created with `g++ -O2 tmp.cpp -save-temps`
