Devirtualization with multiple guesses: JIT (#86809)

Author: EgorBo

src/coreclr/jit/compiler.h

@@ -7128,9 +7128,10 @@ class Compiler
     void pickGDV(GenTreeCall*           call,
                  IL_OFFSET              ilOffset,
                  bool                   isInterface,
-                 CORINFO_CLASS_HANDLE*  classGuess,
-                 CORINFO_METHOD_HANDLE* methodGuess,
-                 unsigned*              likelihood);
+                 CORINFO_CLASS_HANDLE*  classGuesses,
+                 CORINFO_METHOD_HANDLE* methodGuesses,
+                 int*                   candidatesCount,
+                 unsigned*              likelihoods);
 
     void considerGuardedDevirtualization(GenTreeCall*            call,
                                          IL_OFFSET               ilOffset,

src/coreclr/jit/gentree.cpp

@@ -12400,11 +12400,21 @@ void Compiler::gtDispTree(GenTree*     tree,
                 printf(" (FramesRoot last use)");
             }
 
-            if (((call->gtFlags & GTF_CALL_INLINE_CANDIDATE) != 0) &&
-                (call->GetSingleInlineCandidateInfo() != nullptr) &&
-                (call->GetSingleInlineCandidateInfo()->exactContextHnd != nullptr))
+            if ((call->gtFlags & GTF_CALL_INLINE_CANDIDATE) != 0)
             {
-                printf(" (exactContextHnd=0x%p)", dspPtr(call->GetSingleInlineCandidateInfo()->exactContextHnd));
+                InlineCandidateInfo* inlineInfo;
+                if (call->IsGuardedDevirtualizationCandidate())
+                {
+                    inlineInfo = call->GetGDVCandidateInfo(0);
+                }
+                else
+                {
+                    inlineInfo = call->GetSingleInlineCandidateInfo();
+                }
+                if ((inlineInfo != nullptr) && (inlineInfo->exactContextHnd != nullptr))
+                {
+                    printf(" (exactContextHnd=0x%p)", dspPtr(inlineInfo->exactContextHnd));
+                }
             }
 
             gtDispCommonEndLine(tree);