From 0e81f660dbb7c437a3c95427bb495eb18822e42c Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <idadesub@users.sourceforge.net>
Date: Sun, 16 Aug 2009 23:36:33 +0000
Subject: [PATCH] Add helper functions to ConstantInt and ConstantFP to accept
 strings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79212 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Constants.h |  6 ++++++
 lib/VMCore/Constants.cpp | 21 +++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h
index a66773c0b53..fdcc53bc79d 100644
--- a/include/llvm/Constants.h
+++ b/include/llvm/Constants.h
@@ -83,6 +83,11 @@ public:
   /// Return a ConstantInt with the specified value and an implied Type. The
   /// type is the integer type that corresponds to the bit width of the value.
   static ConstantInt* get(LLVMContext &Context, const APInt& V);
+
+  /// Return a ConstantInt constructed from the string strStart with the given
+  /// radix. 
+  static ConstantInt* get(const IntegerType* Ty, const StringRef& Str,
+                          uint8_t radix);
   
   /// If Ty is a vector type, return a Constant with a splat of the given
   /// value. Otherwise return a ConstantInt for the given value.
@@ -250,6 +255,7 @@ public:
   /// only be used for simple constant values like 2.0/1.0 etc, that are
   /// known-valid both as host double and as the target format.
   static Constant* get(const Type* Ty, double V);
+  static Constant* get(const Type* Ty, const StringRef& Str);
   static ConstantFP* get(LLVMContext &Context, const APFloat& V);
   static ConstantFP* getNegativeZero(const Type* Ty);
   
diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index f820033932d..12483cd9c99 100644
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -314,6 +314,11 @@ Constant* ConstantInt::get(const Type* Ty, const APInt& V) {
   return C;
 }
 
+ConstantInt* ConstantInt::get(const IntegerType* Ty, const StringRef& Str,
+                              uint8_t radix) {
+  return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
+}
+
 //===----------------------------------------------------------------------===//
 //                                ConstantFP
 //===----------------------------------------------------------------------===//
@@ -352,6 +357,22 @@ Constant* ConstantFP::get(const Type* Ty, double V) {
   return C;
 }
 
+
+Constant* ConstantFP::get(const Type* Ty, const StringRef& Str) {
+  LLVMContext &Context = Ty->getContext();
+
+  APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
+  Constant *C = get(Context, FV);
+
+  // For vectors, broadcast the value.
+  if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
+    return ConstantVector::get(
+      std::vector<Constant *>(VTy->getNumElements(), C));
+
+  return C; 
+}
+
+
 ConstantFP* ConstantFP::getNegativeZero(const Type* Ty) {
   LLVMContext &Context = Ty->getContext();
   APFloat apf = cast <ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();
-- 
2.34.1