Regressions on trunk at revision 250756 vs revision 250731

[H.J. Lu x32]

New failures:

New passes:
FAIL: gcc.target/i386/pr79793-1.c scan-assembler-times add[lq][\t ]*\\$400,[\t ]*%[re]sp 1
FAIL: gcc.target/i386/pr79793-1.c scan-assembler-times sub[lq][\t ]*\\$400,[\t ]*%[re]sp 1
FAIL: gcc.target/i386/pr79793-2.c scan-assembler-times add[lq][\t ]*\\$400,[\t ]*%[re]sp 1
FAIL: gcc.target/i386/pr79793-2.c scan-assembler-times sub[lq][\t ]*\\$392,[\t ]*%[re]sp 1