Stage two of getting CFE top correct.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@39734 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 68 insertions, 0 deletions

diff --git a/CodeGen/CodeGenModule.cpp b/CodeGen/CodeGenModule.cpp
new file mode 100644
index 0000000000..cdc3e63026
--- /dev/null
+++ b/CodeGen/CodeGenModule.cpp
@@ -0,0 +1,68 @@
+//===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This coordinates the per-module state used while generating code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CodeGenModule.h"
+#include "CodeGenFunction.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/Basic/TargetInfo.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Function.h"
+#include "llvm/GlobalVariable.h"
+#include "llvm/Intrinsics.h"
+using namespace clang;
+using namespace CodeGen;
+
+
+CodeGenModule::CodeGenModule(ASTContext &C, llvm::Module &M)
+  : Context(C), TheModule(M), Types(C.Target) {}
+
+llvm::Constant *CodeGenModule::GetAddrOfGlobalDecl(const Decl *D) {
+  // See if it is already in the map.
+  llvm::Constant *&Entry = GlobalDeclMap[D];
+  if (Entry) return Entry;
+  
+  QualType ASTTy = cast<ValueDecl>(D)->getType();
+  const llvm::Type *Ty = getTypes().ConvertType(ASTTy);
+  if (isa<FunctionDecl>(D)) {
+    const llvm::FunctionType *FTy = cast<llvm::FunctionType>(Ty);
+    // FIXME: param attributes for sext/zext etc.
+    return Entry = new llvm::Function(FTy, llvm::Function::ExternalLinkage,
+                                      D->getName(), &getModule());
+  }
+  
+  assert(isa<FileVarDecl>(D) && "Unknown global decl!");
+  
+  return Entry = new llvm::GlobalVariable(Ty, false, 
+                                          llvm::GlobalValue::ExternalLinkage,
+                                          0, D->getName(), &getModule());
+}
+
+void CodeGenModule::EmitFunction(FunctionDecl *FD) {
+  // If this is not a prototype, emit the body.
+  if (FD->getBody())
+    CodeGenFunction(*this).GenerateCode(FD);
+}
+
+
+
+llvm::Function *CodeGenModule::getMemCpyFn() {
+  if (MemCpyFn) return MemCpyFn;
+  llvm::Intrinsic::ID IID;
+  switch (Context.Target.getPointerWidth(SourceLocation())) {
+  default: assert(0 && "Unknown ptr width");
+  case 32: IID = llvm::Intrinsic::memcpy_i32; break;
+  case 64: IID = llvm::Intrinsic::memcpy_i64; break;
+  }
+  return MemCpyFn = llvm::Intrinsic::getDeclaration(&TheModule, IID);
+}