Regressions on trunk at revision 212981 vs revision 212969

[i64coreavxi@ecsmtp.ims.intel.com]

New failures:

New passes:
FAIL: gcc.dg/ira-shrinkwrap-prep-1.c scan-rtl-dump ira "Split live-range of register"
FAIL: gcc.dg/ira-shrinkwrap-prep-1.c scan-rtl-dump ira "Will split live ranges of parameters"
FAIL: gcc.dg/ira-shrinkwrap-prep-1.c scan-rtl-dump pro_and_epilogue "Performing shrink-wrapping"
FAIL: gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump ira "Split live-range of register"
FAIL: gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump ira "Will split live ranges of parameters"
FAIL: gcc.dg/ira-shrinkwrap-prep-2.c scan-rtl-dump pro_and_epilogue "Performing shrink-wrapping"
FAIL: gcc.dg/pr10474.c scan-rtl-dump pro_and_epilogue "Performing shrink-wrapping"