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Commit 8885c4e2 authored by Chris Lattner's avatar Chris Lattner
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Split saveCallerSavedRegisters into two methods for clarity, and add comments. 

Add support for targets that must spill certain physregs at certain locations.

Patch contributed by Nate Begeman, slightly hacked by me.

llvm-svn: 15701
parent f9db6ff9
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