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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/114215] GCC makes wrong decision for inline with -Os or -Oz to deal with trivial functions Date: Sun, 03 Mar 2024 03:18:33 +0000 [thread overview] Message-ID: <bug-114215-4-3VIPIcBMPe@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-114215-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114215 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Status|UNCONFIRMED |WAITING Last reconfirmed| |2024-03-03 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- checkedvector::value_type& checkedvector::operator[](size_type)/167 call is unlikely and code size would grow freq:1.00 loop depth: 0 size: 4 time: 13 callee size: 6 stack: 0 op1 is compile time invariant If I had: ``` void test_demovector(checkedvector& vec, int x) noexcept { for(int i = 0; i < y; i++) vec[i]=5; } ``` Then GCC will inling operator[]: checkedvector::value_type& checkedvector::operator[](size_type)/167 inlined freq:8.09 Stack frame offset 0, callee self size 0 void __builtin_trap()/205 function body not available freq:0.00 loop depth: 1 size: 1 time: 1 I am suspecting this is the right heurstic. Do you have real code where the inlining does not happen at -Os/-Oz or you just looking at the code generation with code that might be benchmarking things?
next prev parent reply other threads:[~2024-03-03 3:18 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-03 2:53 [Bug rtl-optimization/114215] New: " unlvsur at live dot com 2024-03-03 3:06 ` [Bug ipa/114215] " pinskia at gcc dot gnu.org 2024-03-03 3:18 ` pinskia at gcc dot gnu.org [this message] 2024-03-03 3:27 ` unlvsur at live dot com 2024-03-03 3:30 ` unlvsur at live dot com 2024-03-03 3:36 ` pinskia at gcc dot gnu.org 2024-03-03 3:44 ` [Bug ipa/114215] -Os or -Oz inlining seems wrong for vague linkage functions unlvsur at live dot com 2024-03-03 3:45 ` unlvsur at live dot com 2024-03-06 2:23 ` unlvsur at live dot com
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