Jakob Stoklund Olesen 2bfb324684 Be more strict about detecting multi-use blocks for isolation.
When a block has exactly two uses and the register is both live-in and live-out,
don't isolate the block. We would be inserting two copies, so we haven't really
made any progress.

If the live-in and live-out values separate into disconnected components after
splitting, we would be making progress. We can't detect that for now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117169 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-22 22:48:56 +00:00
2010-10-08 00:36:21 +00:00
2010-10-22 22:15:48 +00:00
2010-10-21 20:28:21 +00:00
2010-01-09 18:40:31 +00:00
2010-08-15 07:07:12 +00:00
2010-09-29 17:39:29 +00:00

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

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LLVM backend for 6502
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