[llvm] r350608 - [LLVM-C] Allow For Creating a BasicBlock without a Parent Function

[Robert Widmann via llvm-commits]

Author: codafi
Date: Mon Jan  7 22:24:19 2019
New Revision: 350608

URL: http://llvm.org/viewvc/llvm-project?rev=350608&view=rev
Log:
[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

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

Modified: llvm/trunk/include/llvm-c/Core.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm-c/Core.h?rev=350608&r1=350607&r2=350608&view=diff
==============================================================================
--- llvm/trunk/include/llvm-c/Core.h (original)
+++ llvm/trunk/include/llvm-c/Core.h Mon Jan  7 22:24:19 2019
@@ -2807,6 +2807,15 @@ LLVMBasicBlockRef LLVMGetPreviousBasicBl
 LLVMBasicBlockRef LLVMGetEntryBasicBlock(LLVMValueRef Fn);
 
 /**
+ * Create a new basic block without inserting it into a function.
+ *
+ * @see llvm::BasicBlock::Create()
+ */
+LLVMBasicBlockRef LLVMCreateBasicBlockInContext(LLVMContextRef C,
+                                                const char *Name,
+                                                size_t NameLen);
+
+/**
  * Append a basic block to the end of a function.
  *
  * @see llvm::BasicBlock::Create()

Modified: llvm/trunk/lib/IR/Core.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Core.cpp?rev=350608&r1=350607&r2=350608&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Core.cpp (original)
+++ llvm/trunk/lib/IR/Core.cpp Mon Jan  7 22:24:19 2019
@@ -2532,6 +2532,12 @@ LLVMBasicBlockRef LLVMGetPreviousBasicBl
   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) {