[Bug c++/22392] New: Huge memory usage and infinite(?) loop with -fno-enforce-eh-specs

["debian-gcc at lists dot debian dot org" <gcc-bugzilla at gcc dot gnu dot org>]

[ forwarded from http://bugs.debian.org/317563 ]

The test case chews up 789m of memory and then doesn't seem to progress
for at least 10 minutes with -O2 -fno-enforce-eh-specs. Functions showing up
prominently in a profile are:

samples  %        symbol name
34188    22.3480  bitmap_set_bit
18170    11.8774  free_deps
17475    11.4231  sched_analyze_insn
14018     9.1633  alloc_INSN_LIST
10173     6.6499  free_list
6100      3.9874  free_INSN_LIST_list
3946      2.5794  bitmap_bit_p
2442      1.5963  build_tree_conflict_graph

With just -O2, it finishes in 1:09 minute using 341m. With g++ 4.1, it finishes
in 1:21 using 148m even with -fno-enforce-eh-specs. g++-3.4 doesn't like this
test case.

This is on alphaev68-linux. The original report was on powerpc.

-- 
           Summary: Huge memory usage and infinite(?) loop with -fno-
                    enforce-eh-specs
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22392