[llvm] expose Function::getFunctionType to LLVM c api (PR #132102)

[Mike Aizatsky via llvm-commits]

https://github.com/mikea created https://github.com/llvm/llvm-project/pull/132102

None

>From ec4abbf159e5989303b09dc2d4d9d4d033863b2e Mon Sep 17 00:00:00 2001
From: Mike Aizatsky <mike.aizatsky at gmail.com>
Date: Wed, 19 Mar 2025 14:07:38 -0700
Subject: [PATCH] expose Function::getFunctionType to LLVM c api

---
 llvm/include/llvm-c/Core.h | 7 +++++++
 llvm/lib/IR/Core.cpp       | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index a414e2061a595..b8f54d02514ef 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -3016,6 +3016,13 @@ LLVMValueRef LLVMGetFirstParam(LLVMValueRef Fn);
  */
 LLVMValueRef LLVMGetLastParam(LLVMValueRef Fn);
 
+/**
+ * Obtain function type.
+ *
+ * @see llvm::Function::getFunctionType()
+ */
+LLVMTypeRef LLVMGetFunctionType(LLVMValueRef Fn);
+
 /**
  * Obtain the next parameter to a function.
  *
diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index f4b03e8cb8aa3..69dba1c2f7966 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -2658,6 +2658,10 @@ void LLVMSetParamAlignment(LLVMValueRef Arg, unsigned align) {
   A->addAttr(Attribute::getWithAlignment(A->getContext(), Align(align)));
 }
 
+LLVMTypeRef LLVMGetFunctionType(LLVMValueRef Fn) {
+  return wrap(unwrap<Function>(Fn)->getFunctionType());
+}
+
 /*--.. Operations on ifuncs ................................................--*/
 
 LLVMValueRef LLVMAddGlobalIFunc(LLVMModuleRef M,