Regressions on trunk at revision 254193 vs revision 254144

[H.J. Lu Intel64 -fpic -mcmodel=medium -mcmodel=large]

New failures:
FAIL: gcc.target/i386/pr70263-2.c scan-rtl-dump ira "Adding REG_EQUIV to insn [0-9]+ for source of insn [0-9]+"
FAIL: gcc.target/i386/pr70263-2.c scan-rtl-dump ira "Adding REG_EQUIV to insn [0-9]+ for source of insn [0-9]+"
FAIL: gcc.target/i386/pr70263-2.c scan-rtl-dump ira "Adding REG_EQUIV to insn [0-9]+ for source of insn [0-9]+"

New passes:
FAIL: gcc.target/i386/pr70021.c scan-tree-dump-times vect "vectorized 1 loops" 2 (found 1 times)
FAIL: gcc.target/i386/pr70021.c scan-tree-dump-times vect "vectorized 1 loops" 2 (found 1 times)
FAIL: gcc.target/i386/pr70021.c scan-tree-dump-times vect "vectorized 1 loops" 2 (found 1 times)