[clang] [Clang][TableGen] Use const pointers for various `Init *` pointers in SA checker emitter (PR #112321)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Rahul Joshi (jurahul)

<details>
<summary>Changes</summary>

Use const pointers for various Init objects in SA checker emitter. This is a 
part of effort to have better const correctness in TableGen backends:

https://discourse.llvm.org/t/psa-planned-changes-to-tablegen-getallderiveddefinitions-api-potential-downstream-breakages/81089

---
Full diff: https://github.com/llvm/llvm-project/pull/112321.diff


1 Files Affected:

- (modified) clang/utils/TableGen/ClangSACheckersEmitter.cpp (+5-5) 


``````````diff
diff --git a/clang/utils/TableGen/ClangSACheckersEmitter.cpp 
b/clang/utils/TableGen/ClangSACheckersEmitter.cpp
index bebdcac3212613..36012dbf70791b 100644
--- a/clang/utils/TableGen/ClangSACheckersEmitter.cpp
+++ b/clang/utils/TableGen/ClangSACheckersEmitter.cpp
@@ -29,7 +29,7 @@ static std::string getPackageFullName(const Record *R, 
StringRef Sep = ".");
 static std::string getParentPackageFullName(const Record *R,
                                             StringRef Sep = ".") {
   std::string name;
-  if (DefInit *DI = dyn_cast<DefInit>(R->getValueInit("ParentPackage")))
+  if (const DefInit *DI = dyn_cast<DefInit>(R->getValueInit("ParentPackage")))
     name = getPackageFullName(DI->getDef(), Sep);
   return name;
 }
@@ -53,7 +53,7 @@ static std::string getCheckerFullName(const Record *R, 
StringRef Sep = ".") {
 }
 
 static std::string getStringValue(const Record &R, StringRef field) {
-  if (StringInit *SI = dyn_cast<StringInit>(R.getValueInit(field)))
+  if (const StringInit *SI = dyn_cast<StringInit>(R.getValueInit(field)))
     return std::string(SI->getValue());
   return std::string();
 }
@@ -94,7 +94,7 @@ static std::string getCheckerDocs(const Record &R) {
 /// the class itself has to be modified for adding a new option type in
 /// CheckerBase.td.
 static std::string getCheckerOptionType(const Record &R) {
-  if (BitsInit *BI = R.getValueAsBitsInit("Type")) {
+  if (const BitsInit *BI = R.getValueAsBitsInit("Type")) {
     switch(getValueFromBitsInit(BI, R)) {
     case 0:
       return "int";
@@ -111,7 +111,7 @@ static std::string getCheckerOptionType(const Record &R) {
 }
 
 static std::string getDevelopmentStage(const Record &R) {
-  if (BitsInit *BI = R.getValueAsBitsInit("DevelopmentStage")) {
+  if (const BitsInit *BI = R.getValueAsBitsInit("DevelopmentStage")) {
     switch(getValueFromBitsInit(BI, R)) {
     case 0:
       return "alpha";
@@ -131,7 +131,7 @@ static bool isHidden(const Record *R) {
     return true;
 
   // Not declared as hidden, check the parent package if it is hidden.
-  if (DefInit *DI = dyn_cast<DefInit>(R->getValueInit("ParentPackage")))
+  if (const DefInit *DI = dyn_cast<DefInit>(R->getValueInit("ParentPackage")))
     return isHidden(DI->getDef());
 
   return false;

``````````

</details>


https://github.com/llvm/llvm-project/pull/112321
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