Andrew Trick 19273aec44 Clear virtual registers after they are no longer referenced. ...

Passes after RegAlloc should be able to rely on MRI->getNumVirtRegs() == 0.
This makes sharing code for pre/postRA passes more robust.
Now, to check if a pass is running before the RA pipeline begins, use MRI->isSSA().
To check if a pass is running after the RA pipeline ends, use !MRI->getNumVirtRegs().

PEI resets virtual regs when it's done scavenging.

PTX will either have to provide its own PEI pass or assign physregs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151032 91177308-0d34-0410-b5e6-96231b3b80d8

2012-02-21 04:51:23 +00:00

..

llvm

Clear virtual registers after they are no longer referenced.

2012-02-21 04:51:23 +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