raulcd commented on code in PR #45697:
URL: https://github.com/apache/arrow/pull/45697#discussion_r1986922860


##########
cpp/src/gandiva/decimal_ir.cc:
##########
@@ -79,13 +79,22 @@ void DecimalIR::AddGlobals(Engine* engine) {
   globalScaleMultipliers->setAlignment(LLVM_ALIGN(16));
 }
 
+#if LLVM_VERSION_MAJOR < 20
+namespace {
+inline llvm::Function* getOrInsertDeclaration(llvm::Module* M, 
llvm::Intrinsic::ID id,
+                                              llvm::ArrayRef<llvm::Type*> Tys) 
{
+  return llvm::Intrinsic::getDeclaration(M, id, Tys);
+}
+}  // namespace
+#endif
+
 // Lookup intrinsic functions
 void DecimalIR::InitializeIntrinsics() {
-  sadd_with_overflow_fn_ = llvm::Intrinsic::getDeclaration(
+  sadd_with_overflow_fn_ = getOrInsertDeclaration(

Review Comment:
   Thanks!



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