Add Subtarget support to PowerPC. Next up, using it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22644 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 48 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCSubtarget.h b/lib/Target/PowerPC/PPCSubtarget.h
new file mode 100644
index 0000000..c114351
--- /dev/null
+++ b/lib/Target/PowerPC/PPCSubtarget.h
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+//=====-- PowerPCSubtarget.h - Define Subtarget for the PPC ---*- C++ -*--====//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Nate Begeman and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the X86 specific subclass of TargetSubtarget.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef POWERPCSUBTARGET_H
+#define POWERPCSUBTARGET_H
+
+#include "llvm/Target/TargetSubtarget.h"
+
+namespace llvm {
+class Module;
+
+class PPCSubtarget : public TargetSubtarget {
+protected:
+  /// stackAlignment - The minimum alignment known to hold of the stack frame on
+  /// entry to the function and which must be maintained by every function.
+  unsigned stackAlignment;
+
+  /// Used by the ISel to turn in optimizations for POWER4-derived architectures
+  bool isGigaProcessor;
+  bool isAIX;
+  bool isDarwin;
+public:
+  /// This constructor initializes the data members to match that
+  /// of the specified module.
+  ///
+  PPCSubtarget(const Module &M);
+
+  /// getStackAlignment - Returns the minimum alignment known to hold of the
+  /// stack frame on entry to the function and which must be maintained by every
+  /// function for this subtarget.
+  unsigned getStackAlignment() const { return stackAlignment; }
+
+  bool IsAIX() const { return isAIX; }
+  bool IsDarwin() const { return isDarwin; }
+};
+} // End llvm namespace
+
+#endif