Benjamin Kramer 7466678003 Add some DAGCombines for (adde 0, 0, glue), which are useful to optimize legalized code for large integer arithmetic.
1. Inform users of ADDEs with two 0 operands that it never sets carry
2. Fold other ADDs or ADDCs into the ADDE if possible

It would be neat if we could do the same thing for SETCC+ADD eventually, but we can't do that in target independent code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126557 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-26 22:48:07 +00:00
2010-12-12 21:42:01 +00:00
2011-01-29 01:09:53 +00:00
2011-02-26 16:44:13 +00:00
2010-12-17 17:22:50 +00:00
2010-11-29 18:16:10 +00:00
2011-02-11 19:11:57 +00:00

Low Level Virtual Machine (LLVM)
================================

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LLVM backend for 6502
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