Add helper

Author: Chengjunp

llvm/include/llvm/Analysis/AliasAnalysis.h

@@ -521,6 +521,10 @@ class AAResults {
   /// the same memory locations.
   ModRefInfo getModRefInfo(const Instruction *I, const CallBase *Call);
 
+  /// Return information about whether two instructions may refer to the same
+  /// memory locations.
+  ModRefInfo getModRefInfo(const Instruction *I1, const Instruction *I2);
+
   /// Return information about whether a particular call site modifies
   /// or reads the specified memory location \p MemLoc before instruction \p I
   /// in a BasicBlock.
@@ -600,7 +604,8 @@ class AAResults {
   ModRefInfo getModRefInfo(const Instruction *I,
                            const std::optional<MemoryLocation> &OptLoc,
                            AAQueryInfo &AAQIP);
-  ModRefInfo getModRefInfo(const Instruction *I1, const Instruction *I2);
+  ModRefInfo getModRefInfo(const Instruction *I1, const Instruction *I2,
+                           AAQueryInfo &AAQI);
   ModRefInfo callCapturesBefore(const Instruction *I,
                                 const MemoryLocation &MemLoc, DominatorTree *DT,
                                 AAQueryInfo &AAQIP);

llvm/lib/Analysis/AliasAnalysis.cpp

@@ -369,19 +369,22 @@ ModRefInfo AAResults::getModRefInfo(const CallBase *Call1,
   return Result;
 }
 
-// Check whether two instructions may read or write the same memory location.
 ModRefInfo AAResults::getModRefInfo(const Instruction *I1,
                                     const Instruction *I2) {
   SimpleAAQueryInfo AAQIP(*this);
+  return getModRefInfo(I1, I2, AAQIP);
+}
 
+ModRefInfo AAResults::getModRefInfo(const Instruction *I1,
+                                    const Instruction *I2, AAQueryInfo &AAQI) {
   // Early-exit if either instruction does not read or write memory.
   if (!I1->mayReadOrWriteMemory() || !I2->mayReadOrWriteMemory())
     return ModRefInfo::NoModRef;
 
   if (const auto *Call2 = dyn_cast<CallBase>(I2))
-    return getModRefInfo(I1, Call2, AAQIP);
+    return getModRefInfo(I1, Call2, AAQI);
 
-  ModRefInfo MR = getModRefInfo(I1, MemoryLocation::getOrNone(I2), AAQIP);
+  ModRefInfo MR = getModRefInfo(I1, MemoryLocation::getOrNone(I2), AAQI);
   return isModOrRefSet(MR) ? ModRefInfo::ModRef : ModRefInfo::NoModRef;
 }