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3 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
c9df025e33 Simplify a bunch of isVirtualRegister() and isPhysicalRegister() logic. 
These functions not longer assert when passed 0, but simply return false instead.

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123155 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-10 02:58:51 +00:00
Jakob Stoklund Olesen
dd479e9769 Use AllocationOrder in RegAllocGreedy, fix a bug in the hint calculation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121584 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-10 22:21:05 +00:00
Jakob Stoklund Olesen
c9672cb8be Add an AllocationOrder class that can iterate over the allocatable physical 
registers for a given virtual register.

Reserved registers are filtered from the allocation order, and any valid hint is
returned as the first suggestion.

For target dependent hints, a number of arcane target hooks are invoked.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121497 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-10 18:36:02 +00:00