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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
2009-04-15 00:16:05 +00:00
2009-03-02 03:46:48 +00:00
2009-04-09 03:10:03 +00:00
2007-08-03 05:43:35 +00:00
2009-02-02 19:22:02 +00:00
2009-02-26 15:17:13 +00:00
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Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level 
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments. 

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the HTML documentation provided in docs/index.html for further
assistance with LLVM.

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