https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37242
Dmitry G. Dyachenko <dimhen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dimhen at gmail dot com
--- Comment #23 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
sounds like gcc10 r274581 optimize c#3 and c#4
c#3 gcc -O -S x.c
f:
.LFB0:
.cfi_startproc
leal 2(%rdi,%rdi), %eax
ret
.cfi_endproc
c#4 gcc -O -S y.c
m:
.LFB0:
.cfi_startproc
movl $0, %eax
ret
.cfi_endproc
$ /usr/local/gcc_current/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc_current/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-pc-linux-gnu/10.0.0/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-checking=yes,df,fold,rtl,extra
--enable-languages=c,c++,lto --disable-multilib --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-offload-targets=nvptx-none
--without-cuda-driver --enable-gnu-indirect-function --with-tune=native
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.0.0 20190816 (experimental) [trunk revision 274581] (GCC)
