[clang] [NFC][Clang] Use `isa_and_nonnull` instead of `VD && isa<VarDecl>(VD)` (PR #93207)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang-codegen

@llvm/pr-subscribers-clang

Author: None (yronglin)

<details>
<summary>Changes</summary>

This issue was found in https://github.com/llvm/llvm-project/pull/86960. But I'd like to avoid mixing together a bunch of cleanups with actual changes.

---
Full diff: https://github.com/llvm/llvm-project/pull/93207.diff


1 Files Affected:

- (modified) clang/lib/CodeGen/CGExpr.cpp (+2-2) 


``````````diff
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 4072025376768..d6478cc6835d8 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -317,8 +317,8 @@ pushTemporaryCleanup(CodeGenFunction &CGF, const MaterializeTemporaryExpr *M,
         CleanupKind CleanupKind;
         if (Lifetime == Qualifiers::OCL_Strong) {
           const ValueDecl *VD = M->getExtendingDecl();
-          bool Precise =
-              VD && isa<VarDecl>(VD) && VD->hasAttr<ObjCPreciseLifetimeAttr>();
+          bool Precise = isa_and_nonnull<VarDecl>(VD) &&
+                         VD->hasAttr<ObjCPreciseLifetimeAttr>();
           CleanupKind = CGF.getARCCleanupKind();
           Destroy = Precise ? &CodeGenFunction::destroyARCStrongPrecise
                             : &CodeGenFunction::destroyARCStrongImprecise;

``````````

</details>


https://github.com/llvm/llvm-project/pull/93207