Regressions on 4.6 at revision 176386 vs revision 176304

[H.J. Lu Intel64]

New failures:
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.
WARNING: program timed out.

New passes:
FAIL: g++.dg/torture/pr49309.C  -O0  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O0  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O1  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O1  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O2  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O2  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O3 -g  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -O3 -g  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -Os  (test for excess errors)
FAIL: g++.dg/torture/pr49309.C  -Os  (test for excess errors)