[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, 23 insertions, 0 deletions

diff --git a/lib/Target/SystemZ/SystemZCallingConv.h b/lib/Target/SystemZ/SystemZCallingConv.h
new file mode 100644
index 0000000000..298985e7e5
--- /dev/null
+++ b/lib/Target/SystemZ/SystemZCallingConv.h
@@ -0,0 +1,23 @@
+//===-- SystemZCallingConv.h - Calling conventions for SystemZ --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SYSTEMZCALLINGCONV_H
+#define SYSTEMZCALLINGCONV_H
+
+namespace llvm {
+  namespace SystemZ {
+    const unsigned NumArgGPRs = 5;
+    extern const unsigned ArgGPRs[NumArgGPRs];
+
+    const unsigned NumArgFPRs = 4;
+    extern const unsigned ArgFPRs[NumArgFPRs];
+  }
+}
+
+#endif