Add Subtarget support to PowerPC. Next up, using it.
llvm-svn: 22644
diff --git a/llvm/lib/Target/PowerPC/PPCSubtarget.h b/llvm/lib/Target/PowerPC/PPCSubtarget.h
new file mode 100644
index 0000000..c114351
--- /dev/null
+++ b/llvm/lib/Target/PowerPC/PPCSubtarget.h
@@ -0,0 +1,48 @@
+//=====-- 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