Regressions on trunk at revision 228616 vs revision 228597

[Bill Schmidt]

New failures:
FAIL: gcc.dg/redecl-3.c (test for excess errors)
FAIL: gcc.target/powerpc/ppc-pow.c scan-assembler-times bl?[\\\\. ]+pow 1
FAIL: gcc.target/powerpc/ppc-pow.c scan-assembler-times fsqrt 3
FAIL: gcc.target/powerpc/pr46728-2.c scan-assembler-times fsqrt|xssqrtdp 4
FAIL: gcc.target/powerpc/pr46728-3.c scan-assembler-times sqrt 4
FAIL: gcc.target/powerpc/pr46728-5.c scan-assembler-times cbrt 2

New passes: