Regressions on trunk at revision 216539 vs revision 216504

[H.J. Lu ia32 Core i7]

New failures:
FAIL: g++.dg/ipa/devirt-42.C  -std=gnu++11  scan-tree-dump-times optimized "return 2" 2
FAIL: g++.dg/ipa/devirt-42.C  -std=gnu++1y  scan-tree-dump-times optimized "return 2" 2
FAIL: g++.dg/ipa/devirt-42.C  -std=gnu++98  scan-tree-dump-times optimized "return 2" 2
ERROR: could not compile testsuite_shared.cc
ERROR: could not compile testsuite_shared.cc
ERROR: could not compile testsuite_shared.cc
ERROR: could not compile testsuite_shared.cc
ERROR: tcl error sourcing /export/gnu/import/git/gcc-test-ia32corei7/src-trunk/libstdc++-v3/testsuite/libstdc++-dg/conformance.exp.
ERROR: tcl error sourcing /export/gnu/import/git/gcc-test-ia32corei7/src-trunk/libstdc++-v3/testsuite/libstdc++-dg/conformance.exp.
ERROR: tcl error sourcing /export/gnu/import/git/gcc-test-ia32corei7/src-trunk/libstdc++-v3/testsuite/libstdc++-prettyprinters/prettyprinters.exp.
ERROR: tcl error sourcing /export/gnu/import/git/gcc-test-ia32corei7/src-trunk/libstdc++-v3/testsuite/libstdc++-prettyprinters/prettyprinters.exp.

New passes: