Introduce LinearScan::isAssignedToInterval()

Signed-off-by: Hyung-Kyu Choi <hk0110.choi@samsung.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/12b5f6cfc4e4fed885b090ae9177e0c0286550de

diff --git a/src/coreclr/src/jit/lsra.cpp b/src/coreclr/src/jit/lsra.cpp
index 1fd2d26..16672cc 100644 (file)
--- a/src/coreclr/src/jit/lsra.cpp
+++ b/src/coreclr/src/jit/lsra.cpp
@@ -6823,6 +6823,15 @@ bool LinearScan::canRestorePreviousInterval(RegRecord* regRec, Interval* assigne
     return retVal;
 }
 
+bool LinearScan::isAssignedToInterval(Interval* interval, RegRecord* regRec)
+{
+    bool isAssigned = (interval->assignedReg == regRec);
+#ifdef _TARGET_ARM_
+    isAssigned |= isSecondHalfReg(regRec, interval);
+#endif
+    return isAssigned;
+}
+
 //------------------------------------------------------------------------
 // processBlockStartLocations: Update var locations on entry to 'currentBlock' and clear constant
 //                             registers.
@@ -7005,12 +7014,7 @@ void LinearScan::processBlockStartLocations(BasicBlock* currentBlock, bool alloc
                 // Is there another interval currently assigned to this register?  If so unassign it.
                 if (assignedInterval != nullptr)
                 {
-#ifdef _TARGET_ARM_
-                    if (assignedInterval->assignedReg == targetRegRecord ||
-                        isSecondHalfReg(targetRegRecord, assignedInterval))
-#else
-                    if (assignedInterval->assignedReg == targetRegRecord)
-#endif
+                    if (isAssignedToInterval(assignedInterval, targetRegRecord))
                     {
                         regNumber assignedRegNum = assignedInterval->assignedReg->regNum;
 

diff --git a/src/coreclr/src/jit/lsra.h b/src/coreclr/src/jit/lsra.h
index 14a986f..bb7b52f 100644 (file)
--- a/src/coreclr/src/jit/lsra.h
+++ b/src/coreclr/src/jit/lsra.h
@@ -700,6 +700,7 @@ private:
     void updateAssignedInterval(RegRecord* reg, Interval* interval, RegisterType regType);
 #endif
     bool canRestorePreviousInterval(RegRecord* regRec, Interval* assignedInterval);
+    bool isAssignedToInterval(Interval* interval, RegRecord* regRec);
 
     RefType CheckBlockType(BasicBlock* block, BasicBlock* prevBlock);