Convert backend to use passes, implement X86TargetMachine

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4421 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 43 insertions, 0 deletions

diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
new file mode 100644
index 0000000000..4273dafefc
--- /dev/null
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -0,0 +1,43 @@
+//===-- X86TargetMachine.cpp - Define TargetMachine for the X86 -----------===//
+// 
+// This file defines the X86 specific subclass of TargetMachine.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86TargetMachine.h"
+#include "llvm/Target/TargetMachineImpls.h"
+#include "llvm/PassManager.h"
+#include "X86.h"
+#include <iostream>
+
+// allocateX86TargetMachine - Allocate and return a subclass of TargetMachine
+// that implements the X86 backend.
+//
+TargetMachine *allocateX86TargetMachine() { return new X86TargetMachine(); }
+
+
+/// X86TargetMachine ctor - Create an ILP32 architecture model
+///
+X86TargetMachine::X86TargetMachine() : TargetMachine("X86", 1, 4, 4, 4) {
+}
+
+
+/// addPassesToJITCompile - Add passes to the specified pass manager to
+/// implement a fast dynamic compiler for this target.  Return true if this is
+/// not supported for this target.
+///
+bool X86TargetMachine::addPassesToJITCompile(PassManager &PM) {
+  PM.add(createSimpleX86InstructionSelector(*this));
+
+  // TODO: optional optimizations go here
+
+  // Perform register allocation to convert to a concrete x86 representation
+  //PM.add(createSimpleX86RegisterAllocator(*this));
+
+  PM.add(createX86CodePrinterPass(*this, std::cerr));
+
+  //PM.add(createEmitX86CodeToMemory(*this));
+
+  return false; // success!
+}
+