[LLVM-C] Allow Specifying Signedness in Int Cast

Summary: Fix an old outstanding problem with the int cast builder binding always assuming the cast is signed by introducing a new LLVMBuildIntCast2 operation and deprecating the old prototype.

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D56280

llvm-svn: 350607
diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index 4064b67..921c830 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -3534,6 +3534,13 @@
   return wrap(unwrap(B)->CreatePointerCast(unwrap(Val), unwrap(DestTy), Name));
 }
 
+LLVMValueRef LLVMBuildIntCast2(LLVMBuilderRef B, LLVMValueRef Val,
+                               LLVMTypeRef DestTy, LLVMBool IsSigned,
+                               const char *Name, size_t NameLen) {
+  return wrap(unwrap(B)->CreateIntCast(unwrap(Val), unwrap(DestTy),
+                                       IsSigned, StringRef(Name, NameLen)));
+}
+
 LLVMValueRef LLVMBuildIntCast(LLVMBuilderRef B, LLVMValueRef Val,
                               LLVMTypeRef DestTy, const char *Name) {
   return wrap(unwrap(B)->CreateIntCast(unwrap(Val), unwrap(DestTy),