Deallocation of dynamic stack space, eg. alloca memory, should be combined with deallocation of stack in function epilogue. This used to happen in 3.4. Testcase in pr23774.
-- Summary: stack deallocation more efficient in 3.4 Product: gcc Version: 4.1.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: normal Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: amodra at bigpond dot net dot au CC: gcc-bugs at gcc dot gnu dot org GCC target triplet: powerpc-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23848