Remove Interval::isMultiReg

This is no longer used after dotnet/coreclr#16517

Commit migrated from https://github.com/dotnet/coreclr/commit/5d01d2d16f4a4c9592002d7c76c19f01f2529140

diff --git a/src/coreclr/src/jit/lsra.cpp b/src/coreclr/src/jit/lsra.cpp
index 01192b2..654b340 100644 (file)
--- a/src/coreclr/src/jit/lsra.cpp
+++ b/src/coreclr/src/jit/lsra.cpp
@@ -2684,8 +2684,7 @@ regNumber LinearScan::tryAllocateFreeReg(Interval* currentInterval, RefPosition*
         {
             // Don't use the relatedInterval for preferencing if its next reference is not a new definition,
             // or if it is only related because they are multi-reg targets of the same node.
-            if (!RefTypeIsDef(nextRelatedRefPosition->refType) ||
-                isMultiRegRelated(nextRelatedRefPosition, refPosition->nodeLocation))
+            if (!RefTypeIsDef(nextRelatedRefPosition->refType))
             {
                 relatedInterval = nullptr;
             }
@@ -4919,18 +4918,6 @@ bool LinearScan::registerIsFree(regNumber regNum, RegisterType regType)
     return isFree;
 }
 
-// isMultiRegRelated: is this RefPosition defining part of a multi-reg value
-//                    at the given location?
-//
-bool LinearScan::isMultiRegRelated(RefPosition* refPosition, LsraLocation location)
-{
-#ifdef FEATURE_MULTIREG_ARGS_OR_RET
-    return ((refPosition->nodeLocation == location) && refPosition->getInterval()->isMultiReg);
-#else
-    return false;
-#endif
-}
-
 //------------------------------------------------------------------------
 // LinearScan::freeRegister: Make a register available for use
 //
@@ -8596,10 +8583,6 @@ void Interval::dump()
     {
         printf(" (constant)");
     }
-    if (isMultiReg)
-    {
-        printf(" (multireg)");
-    }
 
     printf(" RefPositions {");
     for (RefPosition* refPosition = this->firstRefPosition; refPosition != nullptr;

diff --git a/src/coreclr/src/jit/lsra.h b/src/coreclr/src/jit/lsra.h
index e646294..f88f2d9 100644 (file)
--- a/src/coreclr/src/jit/lsra.h
+++ b/src/coreclr/src/jit/lsra.h
@@ -1056,7 +1056,6 @@ private:
     regMaskTP allSIMDRegs();
     regMaskTP internalFloatRegCandidates();
 
-    bool isMultiRegRelated(RefPosition* refPosition, LsraLocation location);
     bool registerIsFree(regNumber regNum, RegisterType regType);
     bool registerIsAvailable(RegRecord*    physRegRecord,
                              LsraLocation  currentLoc,
@@ -1655,7 +1654,6 @@ public:
         , isSpecialPutArg(false)
         , preferCalleeSave(false)
         , isConstant(false)
-        , isMultiReg(false)
         , physReg(REG_COUNT)
 #ifdef DEBUG
         , intervalIndex(0)
@@ -1726,9 +1724,6 @@ public:
     // able to reuse a constant that's already in a register.
     bool isConstant : 1;
 
-    // True if this Interval is defined by a node that produces multiple registers.
-    bool isMultiReg : 1;
-
     // The register to which it is currently assigned.
     regNumber physReg;