[Bug ipa/63416] New: Three calls to empty functions via pointers get folded, but not inlined
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63416 Bug ID: 63416 Summary: Three calls to empty functions via pointers get folded, but not inlined Product: gcc Version: 4.7.4 Status: UNCONFIRMED Severity: normal Priority: P3 Component: ipa Assignee: unassigned at gcc dot gnu.org Reporter: felix.shvaiger at emc dot com Created attachment 33620 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33620&action=edit 3 function calls -> folded, not inlined Missed inlining opportunity. Issue exists in x86 arch. 4.7, 4.8, 4.9, 5.0 versions (maybe earlier too). Option: -O2, -O3 If 2 near-empty functions called via pointers, then calls get folded and inlined. If 3rd empty function call via pointer added, then all calls get folded, but not inlined. Attached test cases (self-contained, no includes): a1.c -- 3 function calls -> folded, not inlined.
[Bug ipa/63416] Three calls to empty functions via pointers get folded, but not inlined
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63416 --- Comment #1 from Felix Shvaiger --- Created attachment 33621 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33621&action=edit 2 function calls -> (for comparison) folded, inlined
[Bug ipa/63416] Three calls to empty functions via pointers get folded, but not inlined
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63416 --- Comment #2 from Felix Shvaiger --- Created attachment 33622 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33622&action=edit disassembly of compiled a1.c -- bad code
[Bug ipa/63416] Three calls to empty functions via pointers get folded, but not inlined
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63416 --- Comment #3 from Felix Shvaiger --- Created attachment 33623 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33623&action=edit disassembly of compiled a2.c -- good code
