Implementation of class MachineFrameInfo.
llvm-svn: 2313
diff --git a/llvm/lib/Target/MachineFrameInfo.cpp b/llvm/lib/Target/MachineFrameInfo.cpp
new file mode 100644
index 0000000..be7feee5
--- /dev/null
+++ b/llvm/lib/Target/MachineFrameInfo.cpp
@@ -0,0 +1,50 @@
+// $Id$ -*-c++-*-
+//***************************************************************************
+// File:
+// MachineFrameInfo.cpp
+//
+// Purpose:
+// Interface to layout of stack frame on target machine.
+// Most functions of class MachineFrameInfo have to be machine-specific
+// so there is little code here.
+//
+// History:
+// 4/17/02 - Vikram Adve - Created
+//**************************************************************************/
+
+
+#include "llvm/Target/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineCodeForMethod.h"
+
+
+int
+MachineFrameInfo::getIncomingArgOffset(MachineCodeForMethod& mcInfo,
+ unsigned argNum) const
+{
+ assert(argsOnStackHaveFixedSize());
+
+ unsigned relativeOffset = argNum * getSizeOfEachArgOnStack();
+ bool growUp; // do args grow up or down
+ int firstArg = getFirstIncomingArgOffset(mcInfo, growUp);
+ int offset = growUp? firstArg + relativeOffset
+ : firstArg - relativeOffset;
+ return offset;
+}
+
+
+int
+MachineFrameInfo::getOutgoingArgOffset(MachineCodeForMethod& mcInfo,
+ unsigned argNum) const
+{
+ assert(argsOnStackHaveFixedSize());
+ assert(((int) argNum - this->getNumFixedOutgoingArgs())
+ <= (int) mcInfo.getMaxOptionalNumArgs());
+
+ unsigned relativeOffset = argNum * getSizeOfEachArgOnStack();
+ bool growUp; // do args grow up or down
+ int firstArg = getFirstOutgoingArgOffset(mcInfo, growUp);
+ int offset = growUp? firstArg + relativeOffset
+ : firstArg - relativeOffset;
+
+ return offset;
+}