[LLVM-C] Add bindings to insert basic blocks

Summary:
Now that we can create standalone basic blocks, it's useful to be able to append them.  Add bindings to

- Insert a basic block after the current insertion block
- Append a basic block to the end of a function's list of basic blocks

Reviewers: whitequark, deadalnix, harlanhaskins

Reviewed By: whitequark, harlanhaskins

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59658

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@357812 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index 393250f..6adb4d8 100644 (file)
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -2917,6 +2917,24 @@ LLVMBasicBlockRef LLVMGetPreviousBasicBlock(LLVMBasicBlockRef BB);
 LLVMBasicBlockRef LLVMGetEntryBasicBlock(LLVMValueRef Fn);
 
 /**
+ * Insert the given basic block after the insertion point of the given builder.
+ *
+ * The insertion point must be valid.
+ *
+ * @see llvm::Function::BasicBlockListType::insertAfter()
+ */
+void LLVMInsertExistingBasicBlockAfterInsertBlock(LLVMBuilderRef Builder,
+                                                  LLVMBasicBlockRef BB);
+
+/**
+ * Append the given basic block to the basic block list of the given function.
+ *
+ * @see llvm::Function::BasicBlockListType::push_back()
+ */
+void LLVMAppendExistingBasicBlock(LLVMValueRef Fn,
+                                  LLVMBasicBlockRef BB);
+  
+/**
  * Create a new basic block without inserting it into a function.
  *
  * @see llvm::BasicBlock::Create()

diff --git a/lib/IR/Core.cpp b/lib/IR/Core.cpp
index aa6bc54..997f533 100644 (file)
--- a/lib/IR/Core.cpp
+++ b/lib/IR/Core.cpp
@@ -2609,6 +2609,20 @@ LLVMBasicBlockRef LLVMCreateBasicBlockInContext(LLVMContextRef C,
   return wrap(llvm::BasicBlock::Create(*unwrap(C), Name));
 }
 
+void LLVMInsertExistingBasicBlockAfterInsertBlock(LLVMBuilderRef Builder,
+                                                  LLVMBasicBlockRef BB) {
+  BasicBlock *ToInsert = unwrap(BB);
+  BasicBlock *CurBB = unwrap(Builder)->GetInsertBlock();
+  assert(CurBB && "current insertion point is invalid!");
+  CurBB->getParent()->getBasicBlockList().insertAfter(CurBB->getIterator(),
+                                                      ToInsert);
+}
+
+void LLVMAppendExistingBasicBlock(LLVMValueRef Fn,
+                                  LLVMBasicBlockRef BB) {
+  unwrap<Function>(Fn)->getBasicBlockList().push_back(unwrap(BB));
+}
+
 LLVMBasicBlockRef LLVMAppendBasicBlockInContext(LLVMContextRef C,
                                                 LLVMValueRef FnRef,
                                                 const char *Name) {