On Fri, Dec 21, 2012 at 11:08 AM, Richard Günther
<richard.guent...@gmail.com> wrote:
> Adam Lewis <adam.j.le...@gmail.com> wrote:
>
>>On Fri, Dec 21, 2012 at 4:41 AM, Richard Biener
>><richard.guent...@gmail.com>wrote:
>>
>>> On Thu, Dec 20, 2012 at 5:33 PM, Adam <adam.j.le...@gmail.com> wrote:
>>> > Hi,
>>> >
>>> > When using -flto is there a way to tell gcc to not inline a
>>particular
>>> function? attribute noinline appears to have no effect. I am using
>>gcc
>>> 4.7.2. The use case is for certain functions that cause optimization
>>> problems when they are inlined. An example is when the function is
>>throwing
>>> a c++ exception.
>>>
>>> attribute noinline should have the desired effect (you may need
>>> noclone as well).
>>>
>>> Richard.
>>>
>>
>>
>>Richard,
>>
>>Doesn't seem to work for me. Here is what I am trying:
>>func.hpp ( I have tried this with various combinations and orderings of
>>noinline, noclone ):
>>
>>void my__func() __attribute__((noinline)) __attribute__ ((noclone));
>>
>>func.cpp:
>>#include <cstdio>
>>void my__func() { printf("prnting"); }
>
> The attribute is missing here. Or the include.
Of course I missed the include, it works now. Sorry for wasting your time!
>
> Richard.
>>
>>main.cpp
>>#include "func.hpp"
>>int main() { my__func(); return 0; }
>>
>>
>>then:
>>g++ -O3 -g -flto main.cpp func.cpp -o lto_inline_test
>>
>>I load up gdb, break main, run. disassemble and see that it is directly
>>calling printf instead of my__func.
>>
>>gcc -v:
>>Using built-in specs.
>>COLLECT_GCC=gcc
>>COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
>>Target: x86_64-linux-gnu
>>Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
>>4.7.2-11precise2'
>>--with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
>>--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
>>--program-suffix=-4.7 --enable-shared --enable-linker-build-id
>>--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
>>--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
>>--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
>>--enable-libstdcxx-debug --enable-libstdcxx-time=yes
>>--enable-gnu-unique-object --enable-plugin --enable-objc-gc
>>--disable-werror --with-arch-32=i686 --with-abi=m64
>>--with-multilib-list=m32,m64 --with-tune=generic
>>--enable-checking=release
>>--build=x86_64-linux-gnu --host=x86_64-linux-gnu
>>--target=x86_64-linux-gnu
>>Thread model: posix
>>gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-11precise2)
>>
>>Any thoughts?
>>
>>
>>
>>
>>
>>>
>>> > Thanks,
>>> > Adam
>>>
>
>
> --
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