[Bug rtl-optimization/37948] New: [4.4 Regression] IRA generates slower code for -mtune=core2

[hjl dot tools at gmail dot com]

+++ This bug was initially created as a clone of Bug #37364 +++

Testcase in PR 37364:

http://gcc.gnu.org/bugzilla/attachment.cgi?id=16536

shows IRA generates slower code for -mtune=core2.

$ gcc -m32 -O2 -mssse3 -mfpmath=sse 36.c
$ time -p ./a.out
real 7.97
$ gcc -m32 -O2 -mssse3 -mfpmath=sse -mtune=core2 -o core2.exe 36.c
$ time -p ./core2.exe
real 12.27


-- 
           Summary: [4.4 Regression] IRA generates slower code for -
                    mtune=core2
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, ra
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com
GCC target triplet: i686-pc-linux-gnu
 BugsThisDependsOn: 37364


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37948