[SystemZ] Add back end

This adds the actual lib/Target/SystemZ target files necessary to
implement the SystemZ target.  Note that at this point, the target
cannot yet be built since the configure bits are missing.  Those
will be provided shortly by a follow-on patch.

This version of the patch incorporates feedback from reviews by
Chris Lattner and Anton Korobeynikov.  Thanks to all reviewers!

Patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181203 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 52 insertions, 0 deletions

diff --git a/lib/Target/SystemZ/SystemZAsmPrinter.h b/lib/Target/SystemZ/SystemZAsmPrinter.h
new file mode 100644
index 0000000000..4b6c51b6f0
--- /dev/null
+++ b/lib/Target/SystemZ/SystemZAsmPrinter.h
@@ -0,0 +1,52 @@
+//===-- SystemZAsmPrinter.h - SystemZ LLVM assembly printer ----*- C++ -*--===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SYSTEMZASMPRINTER_H
+#define SYSTEMZASMPRINTER_H
+
+#include "SystemZTargetMachine.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/Support/Compiler.h"
+
+namespace llvm {
+class MCStreamer;
+class MachineBasicBlock;
+class MachineInstr;
+class Module;
+class raw_ostream;
+
+class LLVM_LIBRARY_VISIBILITY SystemZAsmPrinter : public AsmPrinter {
+private:
+  const SystemZSubtarget *Subtarget;
+
+public:
+  SystemZAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+    : AsmPrinter(TM, Streamer) {
+    Subtarget = &TM.getSubtarget<SystemZSubtarget>();
+  }
+
+  // Override AsmPrinter.
+  virtual const char *getPassName() const LLVM_OVERRIDE {
+    return "SystemZ Assembly Printer";
+  }
+  virtual void EmitInstruction(const MachineInstr *MI) LLVM_OVERRIDE;
+  virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV)
+    LLVM_OVERRIDE;
+  virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                               unsigned AsmVariant, const char *ExtraCode,
+                               raw_ostream &OS) LLVM_OVERRIDE;
+  virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+                                     unsigned AsmVariant,
+                                     const char *ExtraCode,
+                                     raw_ostream &OS) LLVM_OVERRIDE;
+  virtual void EmitEndOfAsmFile(Module &M) LLVM_OVERRIDE;
+};
+} // end namespace llvm
+
+#endif