[clang][NFC] Remove const_casts from diagnostic emissions (llvm#161211)

This is apparently not necessary anymore. Not sure when exactly it
changed though.

Author: tbaederr

clang/lib/Sema/AnalysisBasedWarnings.cpp

@@ -983,10 +983,9 @@ static void DiagUninitUse(Sema &S, const VarDecl *VD, const UninitUse &Use,
   case UninitUse::AfterDecl:
   case UninitUse::AfterCall:
     S.Diag(VD->getLocation(), diag::warn_sometimes_uninit_var)
-      << VD->getDeclName() << IsCapturedByBlock
-      << (Use.getKind() == UninitUse::AfterDecl ? 4 : 5)
-      << const_cast<DeclContext*>(VD->getLexicalDeclContext())
-      << VD->getSourceRange();
+        << VD->getDeclName() << IsCapturedByBlock
+        << (Use.getKind() == UninitUse::AfterDecl ? 4 : 5)
+        << VD->getLexicalDeclContext() << VD->getSourceRange();
     S.Diag(Use.getUser()->getBeginLoc(), diag::note_uninit_var_use)
         << IsCapturedByBlock << Use.getUser()->getSourceRange();
     return;

clang/lib/Sema/SemaConcept.cpp

@@ -193,7 +193,7 @@ DiagRecursiveConstraintEval(Sema &S, llvm::FoldingSetNodeID &ID,
   // Sema::InstantiatingTemplate::isAlreadyBeingInstantiated function.
   if (S.SatisfactionStackContains(Templ, ID)) {
     S.Diag(E->getExprLoc(), diag::err_constraint_depends_on_self)
-        << const_cast<Expr *>(E) << E->getSourceRange();
+        << E << E->getSourceRange();
     return true;
   }
 

clang/lib/Sema/SemaOpenACCAtomic.cpp

@@ -454,9 +454,7 @@ class AtomicOperandChecker {
     // If nothing matches, error out.
     DiagnoseInvalidAtomic(BinInf->FoundExpr->getExprLoc(),
                           SemaRef.PDiag(diag::note_acc_atomic_mismatch_operand)
-                              << const_cast<Expr *>(AssignInf.LHS)
-                              << const_cast<Expr *>(BinInf->LHS)
-                              << const_cast<Expr *>(BinInf->RHS));
+                              << AssignInf.LHS << BinInf->LHS << BinInf->RHS);
     return IDACInfo::Fail();
   }
 
@@ -592,8 +590,7 @@ class AtomicOperandChecker {
 
     PartialDiagnostic PD =
         SemaRef.PDiag(diag::note_acc_atomic_mismatch_compound_operand)
-        << FirstKind << const_cast<Expr *>(FirstX) << SecondKind
-        << const_cast<Expr *>(SecondX);
+        << FirstKind << FirstX << SecondKind << SecondX;
 
     return DiagnoseInvalidAtomic(SecondX->getExprLoc(), PD);
   }