[LLVM-C] Allow For Creating a BasicBlock without a Parent Function

Summary: Add a utility function for creating a basic block without a parent function.  A useful operation for compilers that need to synthesize and conditionally insert code without having to bother with appending and immediately unlinking a block.

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D56279

llvm-svn: 350608

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index 921c830cbf7..6f7c7afc59d 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -2532,6 +2532,12 @@ LLVMBasicBlockRef LLVMGetPreviousBasicBlock(LLVMBasicBlockRef BB) {
   return wrap(&*--I);
 }
 
+LLVMBasicBlockRef LLVMCreateBasicBlockInContext(LLVMContextRef C,
+                                                const char *Name,
+                                                size_t NameLen) {
+  return wrap(llvm::BasicBlock::Create(*unwrap(C), StringRef(Name, NameLen)));
+}
+
 LLVMBasicBlockRef LLVMAppendBasicBlockInContext(LLVMContextRef C,
                                                 LLVMValueRef FnRef,
                                                 const char *Name) {