https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108470
Bug ID: 108470 Summary: Missing documentation for alternate uses of __attribute__((noinline)) Product: gcc Version: 12.2.0 Status: UNCONFIRMED Severity: minor Priority: P3 Component: ipa Assignee: unassigned at gcc dot gnu.org Reporter: rth at gcc dot gnu.org CC: marxin at gcc dot gnu.org Target Milestone: --- The noinline attribute affects decisions made by ipa-split.cc and ipa-icf.cc that are not immediately obvious. At least the ipa-split choice affects code correctness for QEMU (in that we expect __builtin_return_address to be used in very specific contexts, and the transformation done by ipa-split invalidates that). Using noinline on the affected functions prevents the ipa-split optimization and restores functionality. It would be nice to document the effect, so that the workaround is not affected in future gcc versions.