[Bug middle-end/59409] New: [4.9 Regression] 253.perlbmk in SPEC CPU 2K is miscompiled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59409

            Bug ID: 59409
           Summary: [4.9 Regression] 253.perlbmk in SPEC CPU 2K is
                    miscompiled
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com

On x32, r205737 gave

  Running 253.perlbmk ref peak lto default
*** Miscompare of 850.5.19.18.1500.out, see
/export/gnu/import/git/gcc-test-spec-lto/spec/2000/x32/spec/benchspec/CINT2000/253.perlbmk/run/00000004/850.5.19.18.1500.out.mis
*** Miscompare of 957.12.23.26.1014.out, see
/export/gnu/import/git/gcc-test-spec-lto/spec/2000/x32/spec/benchspec/CINT2000/253.perlbmk/run/00000004/957.12.23.26.1014.out.mis
*** Miscompare of 2.550.15.24.23.100.out, see
/export/gnu/import/git/gcc-test-spec-lto/spec/2000/x32/spec/benchspec/CINT2000/253.perlbmk/run/00000004/2.550.15.24.23.100.out.mis
*** Miscompare of 704.12.26.16.836.out, see
/export/gnu/import/git/gcc-test-spec-lto/spec/2000/x32/spec/benchspec/CINT2000/253.perlbmk/run/00000004/704.12.26.16.836.out.mis
*** Miscompare of b.3.m.4.out, see
/export/gnu/import/git/gcc-test-spec-lto/spec/2000/x32/spec/benchspec/CINT2000/253.perlbmk/run/00000004/b.3.m.4.out.mis
*** Miscompare of 535.13.25.24.1091.out, see
/export/gnu/import/git/gcc-test-spec-lto/spec/2000/x32/spec/benchspec/CINT2000/253.perlbmk/run/00000004/535.13.25.24.1091.out.mis

It is compiled with

-O3 -funroll-loops -ffast-math -fwhole-program -flto=jobserver
-fuse-linker-plugin

r205651 is OK.