Regressions on releases/gcc-10 at commit r10-9421 vs commit r10-9419 on Linux/i686

[H.J. Lu]

New failures:
FAIL: libstdc++-prettyprinters/simple.cc print const_intset
FAIL: libstdc++-prettyprinters/simple.cc print lst
FAIL: libstdc++-prettyprinters/simple.cc print lstciter
FAIL: libstdc++-prettyprinters/simple.cc print lstiter0
FAIL: libstdc++-prettyprinters/simple.cc print mp
FAIL: libstdc++-prettyprinters/simple.cc print mpiter
FAIL: libstdc++-prettyprinters/simple.cc print mpiter0
FAIL: libstdc++-prettyprinters/simple.cc print sll
FAIL: libstdc++-prettyprinters/simple.cc print sp
FAIL: libstdc++-prettyprinters/simple.cc print spciter
FAIL: libstdc++-prettyprinters/simple.cc print spiter0
FAIL: libstdc++-prettyprinters/simple.cc print v
FAIL: libstdc++-prettyprinters/simple.cc print vb
FAIL: libstdc++-prettyprinters/simple.cc print viter0
FAIL: libstdc++-prettyprinters/simple.cc print viter3

New passes: