From 6a1a2b139562bb2b17771a88f68dcb7dd006b4d4 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Fri, 25 May 2012 20:42:55 +0000
Subject: [PATCH] Remove the code that emits MIPS' .cprestore directive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157493 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/MipsAsmPrinter.cpp  | 22 ----------------------
 lib/Target/Mips/MipsMCInstLower.cpp | 27 ---------------------------
 lib/Target/Mips/MipsMCInstLower.h   |  1 -
 3 files changed, 50 deletions(-)

diff --git a/lib/Target/Mips/MipsAsmPrinter.cpp b/lib/Target/Mips/MipsAsmPrinter.cpp
index dfeae9a4162..6ed0513ac15 100644
--- a/lib/Target/Mips/MipsAsmPrinter.cpp
+++ b/lib/Target/Mips/MipsAsmPrinter.cpp
@@ -112,28 +112,6 @@ void MipsAsmPrinter::EmitInstruction(const MachineInstr *MI) {
 
     return;
   }
-  case Mips::CPRESTORE: {
-    const MachineOperand &MO = MI->getOperand(0);
-    assert(MO.isImm() && "CPRESTORE's operand must be an immediate.");
-    int64_t Offset = MO.getImm();
-
-    if (OutStreamer.hasRawTextSupport()) {
-      if (!isInt<16>(Offset)) {
-        EmitInstrWithMacroNoAT(MI);
-        return;
-      }
-    } else {
-      MCInstLowering.LowerCPRESTORE(Offset, MCInsts);
-
-      for (SmallVector<MCInst, 4>::iterator I = MCInsts.begin();
-           I != MCInsts.end(); ++I)
-        OutStreamer.EmitInstruction(*I);
-
-      return;
-    }
-
-    break;
-  }
   default:
     break;
   }
diff --git a/lib/Target/Mips/MipsMCInstLower.cpp b/lib/Target/Mips/MipsMCInstLower.cpp
index 8bdcfd9bc25..d3cb6d83ca2 100644
--- a/lib/Target/Mips/MipsMCInstLower.cpp
+++ b/lib/Target/Mips/MipsMCInstLower.cpp
@@ -140,33 +140,6 @@ void MipsMCInstLower::LowerCPLOAD(SmallVector<MCInst, 4>& MCInsts) {
   CreateMCInst(MCInsts[2], Mips::ADDu, GPReg, GPReg, T9Reg);
 }
 
-// Lower ".cprestore offset" to "sw $gp, offset($sp)".
-void MipsMCInstLower::LowerCPRESTORE(int64_t Offset,
-                                     SmallVector<MCInst, 4>& MCInsts) {
-  assert(isInt<32>(Offset) && (Offset >= 0) &&
-         "Imm operand of .cprestore must be a non-negative 32-bit value.");
-
-  MCOperand SPReg = MCOperand::CreateReg(Mips::SP), BaseReg = SPReg;
-  MCOperand GPReg = MCOperand::CreateReg(Mips::GP);
-
-  if (!isInt<16>(Offset)) {
-    unsigned Hi = ((Offset + 0x8000) >> 16) & 0xffff;
-    Offset &= 0xffff;
-    MCOperand ATReg = MCOperand::CreateReg(Mips::AT);
-    BaseReg = ATReg;
-
-    // lui   at,hi
-    // addu  at,at,sp
-    MCInsts.resize(2);
-    CreateMCInst(MCInsts[0], Mips::LUi, ATReg, MCOperand::CreateImm(Hi));
-    CreateMCInst(MCInsts[1], Mips::ADDu, ATReg, ATReg, SPReg);
-  }
-
-  MCInst Sw;
-  CreateMCInst(Sw, Mips::SW, GPReg, BaseReg, MCOperand::CreateImm(Offset));
-  MCInsts.push_back(Sw);
-}
-
 MCOperand MipsMCInstLower::LowerOperand(const MachineOperand& MO,
                                         unsigned offset) const {
   MachineOperandType MOTy = MO.getType();
diff --git a/lib/Target/Mips/MipsMCInstLower.h b/lib/Target/Mips/MipsMCInstLower.h
index 53db3ada15a..fb1a258e0be 100644
--- a/lib/Target/Mips/MipsMCInstLower.h
+++ b/lib/Target/Mips/MipsMCInstLower.h
@@ -34,7 +34,6 @@ public:
   void Initialize(Mangler *mang, MCContext* C);
   void Lower(const MachineInstr *MI, MCInst &OutMI) const;
   void LowerCPLOAD(SmallVector<MCInst, 4>& MCInsts);
-  void LowerCPRESTORE(int64_t Offset, SmallVector<MCInst, 4>& MCInsts);
   void LowerUnalignedLoadStore(const MachineInstr *MI,
                                SmallVector<MCInst, 4>& MCInsts);
   void LowerSETGP01(SmallVector<MCInst, 4>& MCInsts);