[PATCH] D59658: [LLVM-C] Add bindings to insert basic blocks

[Robert Widmann via Phabricator via llvm-commits]

CodaFi created this revision.
CodaFi added reviewers: whitequark, deadalnix.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

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


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D59658

Files:
  llvm/include/llvm-c/Core.h
  llvm/lib/IR/Core.cpp


Index: llvm/lib/IR/Core.cpp
===================================================================
--- llvm/lib/IR/Core.cpp
+++ llvm/lib/IR/Core.cpp
@@ -2605,6 +2605,20 @@
   return wrap(llvm::BasicBlock::Create(*unwrap(C), Name));
 }
 
+void LLVMInsertBasicBlockAfterInsertBlock(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 LLVMAppendBasicBlockToFunction(LLVMValueRef Fn,
+                                    LLVMBasicBlockRef BB) {
+  unwrap<Function>(Fn)->getBasicBlockList().push_back(unwrap(BB));
+}
+
 LLVMBasicBlockRef LLVMAppendBasicBlockInContext(LLVMContextRef C,
                                                 LLVMValueRef FnRef,
                                                 const char *Name) {
Index: llvm/include/llvm-c/Core.h
===================================================================
--- llvm/include/llvm-c/Core.h
+++ llvm/include/llvm-c/Core.h
@@ -2909,6 +2909,24 @@
  */
 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 LLVMInsertBasicBlockAfterInsertBlock(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 LLVMAppendBasicBlockToFunction(LLVMValueRef Fn,
+                                    LLVMBasicBlockRef BB);
+  
 /**
  * Create a new basic block without inserting it into a function.
  *


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