Fix comments in PhysRegTracker and rename isPhysRegAvail to isRegAvail to be consistent with the other two


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11723 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 728c018..0a4077f 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -706,7 +706,7 @@
     for (TargetRegisterClass::iterator i = rc->allocation_order_begin(*mf_);
          i != rc->allocation_order_end(*mf_); ++i) {
         unsigned reg = *i;
-        if (prt_.isPhysRegAvail(reg))
+        if (prt_.isRegAvail(reg))
             return reg;
     }
     return 0;