Implement a generic machine code rewriter/spiller

[llvmbot]

Bugzilla Link	251
Resolution	FIXED
Resolved on	Feb 22, 2010 12:50
Version	trunk
OS	All
Reporter	LLVM Bugzilla Contributor
CC	@lattner

Extended Description

After (global) register allocation, given a mapping from virtual to physical
registers and stack slots we can generically add spill code and rewrite the
machine instructions.

[llvmbot]

This has been implemented. Here are the relevant patches:

http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040223/012119.html
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040223/012120.html
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040223/012121.html
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040223/012138.html
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20040223/012141.html