[LLVM-C] Add LLVM{IsConstantString,GetAsString,GetElementAsConstant}.

llvm-svn: 214676

2 files changed, 37 insertions, 0 deletions

diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index fdff77bc5e5..69ed08dff1f 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -1570,6 +1570,20 @@ LLVMValueRef LLVMConstString(const char *Str, unsigned Length,
                              LLVMBool DontNullTerminate);
 
 /**
+ * Returns true if the specified constant is an array of i8.
+ *
+ * @see ConstantDataSequential::getAsString()
+ */
+LLVMBool LLVMIsConstantString(LLVMValueRef c);
+
+/**
+ * Get the given constant data sequential as a string.
+ *
+ * @see ConstantDataSequential::getAsString()
+ */
+const char *LLVMGetAsString(LLVMValueRef c, size_t* out);
+
+/**
  * Create an anonymous ConstantStruct with the specified values.
  *
  * @see llvm::ConstantStruct::getAnon()
@@ -1607,6 +1621,13 @@ LLVMValueRef LLVMConstNamedStruct(LLVMTypeRef StructTy,
                                   unsigned Count);
 
 /**
+ * Get an element at specified index as a constant.
+ *
+ * @see ConstantDataSequential::getElementAsConstant()
+ */
+LLVMValueRef LLVMGetElementAsConstant(LLVMValueRef c, unsigned idx);
+
+/**
  * Create a ConstantVector from values.
  *
  * @see llvm::ConstantVector::get()
diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index 87099a6c4e1..8bc0bb92e60 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -790,11 +790,27 @@ LLVMValueRef LLVMConstString(const char *Str, unsigned Length,
   return LLVMConstStringInContext(LLVMGetGlobalContext(), Str, Length,
                                   DontNullTerminate);
 }
+
+LLVMValueRef LLVMGetElementAsConstant(LLVMValueRef c, unsigned idx) {
+  return wrap(static_cast<ConstantDataSequential*>(unwrap(c))->getElementAsConstant(idx));
+}
+
+LLVMBool LLVMIsConstantString(LLVMValueRef c) {
+  return static_cast<ConstantDataSequential*>(unwrap(c))->isString();
+}
+
+const char *LLVMGetAsString(LLVMValueRef c, size_t* Length) {
+  StringRef str = static_cast<ConstantDataSequential*>(unwrap(c))->getAsString();
+  *Length = str.size();
+  return str.data();
+}
+
 LLVMValueRef LLVMConstArray(LLVMTypeRef ElementTy,
                             LLVMValueRef *ConstantVals, unsigned Length) {
   ArrayRef<Constant*> V(unwrap<Constant>(ConstantVals, Length), Length);
   return wrap(ConstantArray::get(ArrayType::get(unwrap(ElementTy), Length), V));
 }
+
 LLVMValueRef LLVMConstStruct(LLVMValueRef *ConstantVals, unsigned Count,
                              LLVMBool Packed) {
   return LLVMConstStructInContext(LLVMGetGlobalContext(), ConstantVals, Count,