Revert "expt"

This reverts commit 9b2a62d.

Author: DeepakRajendrakumaran

src/coreclr/jit/lsra.cpp

@@ -4945,37 +4945,20 @@ void LinearScan::allocateRegistersMinimal()
         // TODO: Can we combine this with the freeing of registers below? It might
         // mess with the dump, since this was previously being done before the call below
         // to dumpRegRecords.
-       // regMaskTP tempRegsToMakeInactive = (regsToMakeInactive | delayRegsToMakeInactive);
-        /*while (tempRegsToMakeInactive.IsNonEmpty())
+        regMaskTP tempRegsToMakeInactive = (regsToMakeInactive | delayRegsToMakeInactive);
+        while (tempRegsToMakeInactive.IsNonEmpty())
         {
             regNumber  nextReg   = genFirstRegNumFromMaskAndToggle(tempRegsToMakeInactive);
             RegRecord* regRecord = getRegisterRecord(nextReg);
             clearSpillCost(regRecord->regNum, regRecord->registerType);
             makeRegisterInactive(regRecord);
-        }*/
-       SingleTypeRegSet tempRegsToMakeInactiveLow = regsToMakeInactive.getLow()  | delayRegsToMakeInactive.getLow();
-        while (tempRegsToMakeInactiveLow != RBM_NONE)
-        {
-            regNumber  nextReg   = genFirstRegNumFromMaskAndToggle(tempRegsToMakeInactiveLow);
-            RegRecord* regRecord = getRegisterRecord(nextReg);
-            clearSpillCost(regRecord->regNum, regRecord->registerType);
-            makeRegisterInactive(regRecord);
         }
-#ifdef HAS_MORE_THAN_64_REGISTERS
-        SingleTypeRegSet tempRegsToMakeInactiveHigh = regsToMakeInactive.getHigh() | delayRegsToMakeInactive.getHigh();
-        while (tempRegsToMakeInactiveHigh != RBM_NONE)
-        {
-            regNumber  nextReg   = (regNumber) (genFirstRegNumFromMaskAndToggle(tempRegsToMakeInactiveHigh) + REG_HIGH_BASE);
-            RegRecord* regRecord = getRegisterRecord(nextReg);
-            clearSpillCost(regRecord->regNum, regRecord->registerType);
-            makeRegisterInactive(regRecord);
-        }
-#endif // HAS_MORE_THAN_64_REGISTERS
         if (currentRefPosition.nodeLocation > prevLocation)
         {
             makeRegsAvailable(regsToMakeInactive);
             // TODO: Clean this up. We need to make the delayRegs inactive as well, but don't want
             // to mark them as free yet.
+            regsToMakeInactive |= delayRegsToMakeInactive;
             regsToMakeInactive      = delayRegsToMakeInactive;
             delayRegsToMakeInactive = RBM_NONE;
         }
@@ -5660,6 +5643,7 @@ void LinearScan::allocateRegisters()
             makeRegsAvailable(regsToMakeInactive);
             // TODO: Clean this up. We need to make the delayRegs inactive as well, but don't want
             // to mark them as free yet.
+            regsToMakeInactive |= delayRegsToMakeInactive;
             regsToMakeInactive      = delayRegsToMakeInactive;
             delayRegsToMakeInactive = RBM_NONE;
         }