Jakob Stoklund Olesen 3fd3a840c5 Keep track of register masks in LiveIntervalAnalysis. ...

Build an ordered vector of register mask operands (i.e., calls) when
computing live intervals. Provide a checkRegMaskInterference() function
that computes a bit mask of usable registers for a live range.

This is a quick way of determining of a live range crosses any calls,
and restricting it to the callee saved registers if it does.
Previously, we had to discover call clobbers for each candidate register
independently.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150077 91177308-0d34-0410-b5e6-96231b3b80d8

2012-02-08 17:33:45 +00:00

..

llvm

Keep track of register masks in LiveIntervalAnalysis.

2012-02-08 17:33:45 +00:00

llvm-c

[unwind removal] Remove all of the code for the dead 'unwind' instruction. There

2012-02-06 21:44:22 +00:00