1 files changed, 108 insertions, 0 deletions
diff --git a/lib/CodeGen/CodeGenTypeCache.h b/lib/CodeGen/CodeGenTypeCache.h
new file mode 100644
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+++ b/lib/CodeGen/CodeGenTypeCache.h
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+//===--- CodeGenTypeCache.h - Commonly used LLVM types and info -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This structure provides a set of common types useful during IR emission.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H
+#define LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H
+
+#include "clang/AST/CharUnits.h"
+#include "llvm/IR/CallingConv.h"
+
+namespace llvm {
+  class Type;
+  class IntegerType;
+  class PointerType;
+}
+
+namespace clang {
+namespace CodeGen {
+
+/// This structure provides a set of types that are commonly used
+/// during IR emission.  It's initialized once in CodeGenModule's
+/// constructor and then copied around into new CodeGenFunctions.
+struct CodeGenTypeCache {
+  /// void
+  llvm::Type *VoidTy;
+
+  /// i8, i16, i32, and i64
+  llvm::IntegerType *Int8Ty, *Int16Ty, *Int32Ty, *Int64Ty;
+  /// float, double
+  llvm::Type *FloatTy, *DoubleTy;
+
+  /// int
+  llvm::IntegerType *IntTy;
+
+  /// intptr_t, size_t, and ptrdiff_t, which we assume are the same size.
+  union {
+    llvm::IntegerType *IntPtrTy;
+    llvm::IntegerType *SizeTy;
+    llvm::IntegerType *PtrDiffTy;
+  };
+
+  /// void* in address space 0
+  union {
+    llvm::PointerType *VoidPtrTy;
+    llvm::PointerType *Int8PtrTy;
+  };
+
+  /// void** in address space 0
+  union {
+    llvm::PointerType *VoidPtrPtrTy;
+    llvm::PointerType *Int8PtrPtrTy;
+  };
+
+  /// The size and alignment of the builtin C type 'int'.  This comes
+  /// up enough in various ABI lowering tasks to be worth pre-computing.
+  union {
+    unsigned char IntSizeInBytes;
+    unsigned char IntAlignInBytes;
+  };
+  CharUnits getIntSize() const {
+    return CharUnits::fromQuantity(IntSizeInBytes);
+  }
+  CharUnits getIntAlign() const {
+    return CharUnits::fromQuantity(IntAlignInBytes);
+  }
+
+  /// The width of a pointer into the generic address space.
+  unsigned char PointerWidthInBits;
+
+  /// The size and alignment of a pointer into the generic address space.
+  union {
+    unsigned char PointerAlignInBytes;
+    unsigned char PointerSizeInBytes;
+    unsigned char SizeSizeInBytes; // sizeof(size_t)
+    unsigned char SizeAlignInBytes;
+  };
+  CharUnits getSizeSize() const {
+    return CharUnits::fromQuantity(SizeSizeInBytes);
+  }
+  CharUnits getSizeAlign() const {
+    return CharUnits::fromQuantity(SizeAlignInBytes);
+  }
+  CharUnits getPointerSize() const {
+    return CharUnits::fromQuantity(PointerSizeInBytes);
+  }
+  CharUnits getPointerAlign() const {
+    return CharUnits::fromQuantity(PointerAlignInBytes);
+  }
+
+  llvm::CallingConv::ID RuntimeCC;
+  llvm::CallingConv::ID getRuntimeCC() const { return RuntimeCC; }
+  llvm::CallingConv::ID BuiltinCC;
+  llvm::CallingConv::ID getBuiltinCC() const { return BuiltinCC; }
+};
+
+}  // end namespace CodeGen
+}  // end namespace clang
+
+#endif