Reorganized the Sparc backend to be more modular -- each different

implementation of a Target{RegInfo, InstrInfo, Machine, etc} now has a separate
header and a separate implementation file.

This means that instead of a massive SparcInternals.h that forces a
recompilation of the whole target whenever a minor detail is changed, you should
only recompile a few files.

Note that SparcInternals.h is still around; its contents should be minimized.

llvm-svn: 10500

1 files changed, 65 insertions, 0 deletions

diff --git a/llvm/lib/Target/Sparc/SparcV9FrameInfo.cpp b/llvm/lib/Target/Sparc/SparcV9FrameInfo.cpp
new file mode 100644
index 00000000000..d283e942bb4
--- /dev/null
+++ b/llvm/lib/Target/Sparc/SparcV9FrameInfo.cpp
@@ -0,0 +1,65 @@
+//===-- Sparc.cpp - General implementation file for the Sparc Target ------===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+// 
+// Interface to stack frame layout info for the UltraSPARC.  Starting offsets
+// for each area of the stack frame are aligned at a multiple of
+// getStackFrameSizeAlignment().
+// 
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineFunctionInfo.h"
+#include "llvm/Target/TargetFrameInfo.h"
+#include "SparcFrameInfo.h"
+
+using namespace llvm;
+
+int
+SparcFrameInfo::getFirstAutomaticVarOffset(MachineFunction&, bool& pos) const {
+  pos = false;                          // static stack area grows downwards
+  return StaticAreaOffsetFromFP;
+}
+
+int
+SparcFrameInfo::getRegSpillAreaOffset(MachineFunction& mcInfo, bool& pos) const 
+{
+  // ensure no more auto vars are added
+  mcInfo.getInfo()->freezeAutomaticVarsArea();
+  
+  pos = false;                          // static stack area grows downwards
+  unsigned autoVarsSize = mcInfo.getInfo()->getAutomaticVarsSize();
+  return StaticAreaOffsetFromFP - autoVarsSize; 
+}
+
+int SparcFrameInfo::getTmpAreaOffset(MachineFunction& mcInfo, bool& pos) const {
+  MachineFunctionInfo *MFI = mcInfo.getInfo();
+  MFI->freezeAutomaticVarsArea();     // ensure no more auto vars are added
+  MFI->freezeSpillsArea();            // ensure no more spill slots are added
+  
+  pos = false;                          // static stack area grows downwards
+  unsigned autoVarsSize = MFI->getAutomaticVarsSize();
+  unsigned spillAreaSize = MFI->getRegSpillsSize();
+  int offset = autoVarsSize + spillAreaSize;
+  return StaticAreaOffsetFromFP - offset;
+}
+
+int
+SparcFrameInfo::getDynamicAreaOffset(MachineFunction& mcInfo, bool& pos) const {
+  // Dynamic stack area grows downwards starting at top of opt-args area.
+  // The opt-args, required-args, and register-save areas are empty except
+  // during calls and traps, so they are shifted downwards on each
+  // dynamic-size alloca.
+  pos = false;
+  unsigned optArgsSize = mcInfo.getInfo()->getMaxOptionalArgsSize();
+  if (int extra = optArgsSize % getStackFrameSizeAlignment())
+    optArgsSize += (getStackFrameSizeAlignment() - extra);
+  int offset = optArgsSize + FirstOptionalOutgoingArgOffsetFromSP;
+  assert((offset - OFFSET) % getStackFrameSizeAlignment() == 0);
+  return offset;
+}