it has more than one real use (non-chain uses).
* Record folded chain producing node in CodeGenMap.
* Do not fold a chain producing node if it has already been selected as an
operand of a chain use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24647 91177308-0d34-0410-b5e6-96231b3b80d8
1. Only forward subst offsets into loads and stores, not into arbitrary
things, where it will likely become a load.
2. If the source is a cast from pointer, forward subst the cast as well,
allowing us to fold the cast away (improving cases when the cast is
from an alloca or global).
This hasn't been fully tested, but does appear to further reduce register
pressure and improve code. Lets let the testers grind on it a bit. :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24640 91177308-0d34-0410-b5e6-96231b3b80d8
false if the match is not profitable. e.g. leal 1(%eax), %eax.
* Added patterns for X86 integer loads and LEA32.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24635 91177308-0d34-0410-b5e6-96231b3b80d8
matching code that is not currently auto-generated by tblgen, e.g. X86
addressing mode. Selection routines for complex patterns can return multiple operands, e.g. X86 addressing mode returns 4.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24634 91177308-0d34-0410-b5e6-96231b3b80d8
amount handling that PPC provides. These are generated by the lowering code
and prevents the dag combiner from assuming (rightfully) that the shifts
don't only look at 5 bits. This fixes a miscompilation of crafty with
the new front-end.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24615 91177308-0d34-0410-b5e6-96231b3b80d8
