[clang] [Clang][Sema][NFC]Use isa_and_nonnull to simplify the code (PR #84181)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: None (ZERO-N)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/84181.diff


1 Files Affected:

- (modified) clang/lib/Sema/SemaExceptionSpec.cpp (+3-2) 


``````````diff
diff --git a/clang/lib/Sema/SemaExceptionSpec.cpp b/clang/lib/Sema/SemaExceptionSpec.cpp
index 3563b4f683f079..0ce00dd0f847ec 100644
--- a/clang/lib/Sema/SemaExceptionSpec.cpp
+++ b/clang/lib/Sema/SemaExceptionSpec.cpp
@@ -21,6 +21,7 @@
 #include "clang/Basic/SourceManager.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/Support/Casting.h"
 #include <optional>
 
 namespace clang {
@@ -1017,13 +1018,13 @@ CanThrowResult Sema::canCalleeThrow(Sema &S, const Expr *E, const Decl *D,
                                     SourceLocation Loc) {
   // As an extension, we assume that __attribute__((nothrow)) functions don't
   // throw.
-  if (D && isa<FunctionDecl>(D) && D->hasAttr<NoThrowAttr>())
+  if (isa_and_nonnull<FunctionDecl>(D) && D->hasAttr<NoThrowAttr>())
     return CT_Cannot;
 
   QualType T;
 
   // In C++1z, just look at the function type of the callee.
-  if (S.getLangOpts().CPlusPlus17 && E && isa<CallExpr>(E)) {
+  if (S.getLangOpts().CPlusPlus17 && isa_and_nonnull<CallExpr>(E)) {
     E = cast<CallExpr>(E)->getCallee();
     T = E->getType();
     if (T->isSpecificPlaceholderType(BuiltinType::BoundMember)) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/84181