[Bug tree-optimization/32891] New: [4.2 Regression] PRE goes crazy on YQPkgTechnicalDetailsView.cpp

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

In 4.2 with -O2 we use 1.5GB compiling the testcase while with 4.1 we only
needed
360MB.  Using -fno-tree-pre fixes the memory regression.

Some recent 4.3 ICEs for me on the testcase (you need -O2 -fpermissive) with

/usr/include/boost/regex/v4/basic_regex_creator.hpp:515: internal compiler
error: in expand_or_defer_fn, at cp/semantics.c:3220
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

so I have no way to verify if the problem persists in 4.3 at the moment.


-- 
           Summary: [4.2 Regression] PRE goes crazy on
                    YQPkgTechnicalDetailsView.cpp
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Keywords: memory-hog
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32891