[LVIPrinterPass] Print LVI info for function arguments

Using AssemblyAnnotationWriter for LVI printer prints
for instructions and basic blocks.
So, we explicitly need to print LVI info for the arguments of the function (these
are values and not instructions).

llvm-svn: 298640

diff --git a/llvm/lib/Analysis/LazyValueInfo.cpp b/llvm/lib/Analysis/LazyValueInfo.cpp
index 0582052..17e7813 100644 (file)
--- a/llvm/lib/Analysis/LazyValueInfo.cpp
+++ b/llvm/lib/Analysis/LazyValueInfo.cpp
@@ -486,6 +486,18 @@ namespace {
       OS << "; OverDefined values for block are: \n";
       for (auto *V : ODI->second)
         OS << ";" << *V << "\n";
+
+      // Find if there are latticevalues defined for arguments of the function.
+      auto *F = const_cast<Function *>(BB->getParent());
+      for (auto &Arg : F->args()) {
+        auto VI = LVICache->ValueCache.find_as(&Arg);
+        if (VI == LVICache->ValueCache.end())
+          continue;
+        auto BBI = VI->second->BlockVals.find(const_cast<BasicBlock *>(BB));
+        if (BBI != VI->second->BlockVals.end())
+          OS << "; CachedLatticeValue for: '" << *VI->first << "' is: '"
+             << BBI->second << "'\n";
+      }
     }
 
     virtual void emitInstructionAnnot(const Instruction *I,