Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123170 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcFrameLowering.cpp b/lib/Target/Sparc/SparcFrameLowering.cpp
new file mode 100644
index 0000000..1efd707
--- /dev/null
+++ b/lib/Target/Sparc/SparcFrameLowering.cpp
@@ -0,0 +1,80 @@
+//====- SparcFrameLowering.cpp - Sparc Frame Information -------*- C++ -*-====//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the Sparc implementation of TargetFrameLowering class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SparcFrameLowering.h"
+#include "SparcInstrInfo.h"
+#include "SparcMachineFunctionInfo.h"
+#include "llvm/Function.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Support/CommandLine.h"
+
+using namespace llvm;
+
+void SparcFrameLowering::emitPrologue(MachineFunction &MF) const {
+ MachineBasicBlock &MBB = MF.front();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+ const SparcInstrInfo &TII =
+ *static_cast<const SparcInstrInfo*>(MF.getTarget().getInstrInfo());
+ MachineBasicBlock::iterator MBBI = MBB.begin();
+ DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
+
+ // Get the number of bytes to allocate from the FrameInfo
+ int NumBytes = (int) MFI->getStackSize();
+
+ // Emit the correct save instruction based on the number of bytes in
+ // the frame. Minimum stack frame size according to V8 ABI is:
+ // 16 words for register window spill
+ // 1 word for address of returned aggregate-value
+ // + 6 words for passing parameters on the stack
+ // ----------
+ // 23 words * 4 bytes per word = 92 bytes
+ NumBytes += 92;
+
+ // Round up to next doubleword boundary -- a double-word boundary
+ // is required by the ABI.
+ NumBytes = (NumBytes + 7) & ~7;
+ NumBytes = -NumBytes;
+
+ if (NumBytes >= -4096) {
+ BuildMI(MBB, MBBI, dl, TII.get(SP::SAVEri), SP::O6)
+ .addReg(SP::O6).addImm(NumBytes);
+ } else {
+ // Emit this the hard way. This clobbers G1 which we always know is
+ // available here.
+ unsigned OffHi = (unsigned)NumBytes >> 10U;
+ BuildMI(MBB, MBBI, dl, TII.get(SP::SETHIi), SP::G1).addImm(OffHi);
+ // Emit G1 = G1 + I6
+ BuildMI(MBB, MBBI, dl, TII.get(SP::ORri), SP::G1)
+ .addReg(SP::G1).addImm(NumBytes & ((1 << 10)-1));
+ BuildMI(MBB, MBBI, dl, TII.get(SP::SAVErr), SP::O6)
+ .addReg(SP::O6).addReg(SP::G1);
+ }
+}
+
+void SparcFrameLowering::emitEpilogue(MachineFunction &MF,
+ MachineBasicBlock &MBB) const {
+ MachineBasicBlock::iterator MBBI = prior(MBB.end());
+ const SparcInstrInfo &TII =
+ *static_cast<const SparcInstrInfo*>(MF.getTarget().getInstrInfo());
+ DebugLoc dl = MBBI->getDebugLoc();
+ assert(MBBI->getOpcode() == SP::RETL &&
+ "Can only put epilog before 'retl' instruction!");
+ BuildMI(MBB, MBBI, dl, TII.get(SP::RESTORErr), SP::G0).addReg(SP::G0)
+ .addReg(SP::G0);
+}