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* [Bug c++/16922] gcc inlines functions with attribute noinline [not found] <bug-16922-4@http.gcc.gnu.org/bugzilla/> @ 2023-01-29 20:23 ` pinskia at gcc dot gnu.org 2023-01-29 20:23 ` pinskia at gcc dot gnu.org 2023-01-29 20:24 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-01-29 20:23 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16922 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hp at gcc dot gnu.org --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- *** Bug 34563 has been marked as a duplicate of this bug. *** ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/16922] gcc inlines functions with attribute noinline [not found] <bug-16922-4@http.gcc.gnu.org/bugzilla/> 2023-01-29 20:23 ` [Bug c++/16922] gcc inlines functions with attribute noinline pinskia at gcc dot gnu.org @ 2023-01-29 20:23 ` pinskia at gcc dot gnu.org 2023-01-29 20:24 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-01-29 20:23 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16922 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |yuri at tsoft dot com --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- *** Bug 56099 has been marked as a duplicate of this bug. *** ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/16922] gcc inlines functions with attribute noinline [not found] <bug-16922-4@http.gcc.gnu.org/bugzilla/> 2023-01-29 20:23 ` [Bug c++/16922] gcc inlines functions with attribute noinline pinskia at gcc dot gnu.org 2023-01-29 20:23 ` pinskia at gcc dot gnu.org @ 2023-01-29 20:24 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-01-29 20:24 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16922 --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Note noipa attribute has been added for a while now if you want not IPA based optimizations for this function. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/16922] New: gcc inlines functions with attribute noinline @ 2004-08-08 19:21 wwieser at gmx dot de 2004-08-08 19:24 ` [Bug c++/16922] " pinskia at gcc dot gnu dot org 0 siblings, 1 reply; 4+ messages in thread From: wwieser at gmx dot de @ 2004-08-08 19:21 UTC (permalink / raw) To: gcc-bugs Well, so this tricked me in some function call time measurements: In the following code... ----------<test.cc>----------------------------- int foo(int x) __attribute__((noinline)); int main() { for(int i=0; i<0x7fffffff; i++) foo(i); } int foo(int x) { return(x); } ------------------------------------------------ ...the function foo() actually gets inlined when compiled with g++ -O2 -fno-rtti -fno-exceptions test.cc -o test.S as can be seen in the produced assembler code [...] main: pushl %ebp xorl %eax, %eax movl %esp, %ebp subl $8, %esp andl $-16, %esp subl $16, %esp .p2align 4,,15 .L6: <-- loop start incl %eax cmpl $2147483647, %eax jne .L6 <-- loop end [...] The "call foo" is missing and got optimized away. Version in question: ggc (GCC) 3.4.2 20040808 (prerelease) Wolfgang -- Summary: gcc inlines functions with attribute noinline Product: gcc Version: 3.4.2 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: wwieser at gmx dot de CC: gcc-bugs at gcc dot gnu dot org GCC build triplet: i686-linux-gnu GCC host triplet: i686-linux-gnu GCC target triplet: i686-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16922 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/16922] gcc inlines functions with attribute noinline 2004-08-08 19:21 [Bug c++/16922] New: " wwieser at gmx dot de @ 2004-08-08 19:24 ` pinskia at gcc dot gnu dot org 0 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-08-08 19:24 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-08-08 19:24 ------- Actually it did not inline the function but saw the function was a pure and a constant function so the function call did not need to be called at all and removed the call. So this is invalid. -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |INVALID http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16922 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-01-29 20:24 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <bug-16922-4@http.gcc.gnu.org/bugzilla/> 2023-01-29 20:23 ` [Bug c++/16922] gcc inlines functions with attribute noinline pinskia at gcc dot gnu.org 2023-01-29 20:23 ` pinskia at gcc dot gnu.org 2023-01-29 20:24 ` pinskia at gcc dot gnu.org 2004-08-08 19:21 [Bug c++/16922] New: " wwieser at gmx dot de 2004-08-08 19:24 ` [Bug c++/16922] " pinskia at gcc dot gnu dot org
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