Evan Cheng a36c6c6819 It has finally happened. Spiller is now using live interval info. ... This fixes a very subtle bug. vr defined by an implicit_def is allowed overlap with any register since it doesn't actually modify anything. However, if it's used as a two-address use, its live range can be extended and it can be spilled. The spiller must take care not to emit a reload for the vn number that's defined by the implicit_def. This is both a correctness and performance issue. llvm-svn: 69743		2009-04-21 22:46:52 +00:00
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llvm	It has finally happened. Spiller is now using live interval info.	2009-04-21 22:46:52 +00:00
llvm-c	add AvailableExternally linkage to C bindings.	2009-04-13 06:25:37 +00:00