[Bug target/47800] [4.6 Regression] i?86 peephole related ICE

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47800

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-18 15:19:16 UTC ---
Created attachment 23395
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23395
gcc46-pr47800-2.patch

Or just do the first insn completely in QI/HImode and the second in SImode, as
done in this patch.  The assembly in the testcase happens to be identical
because even for the QImode move gcc decides to emit it as movzbl, but that
doesn't have to be always.  IMHO if we leave garbage in the upper bits, it
shouldn't matter, as from the lea only the low 8 or 16 bits are meaningful
anyway for QI/HImode.