Regressions on trunk at revision 204773 vs revision 204734

[H.J. Lu Intel64]

New failures:
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 24 sizeof (a) == 17 * sizeof (short)

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"