[Hexagon] Remove HexagonExpandPredSpillCode pass

This code is dead. The expansion is now done in HexagonFrameLowering.

llvm-svn: 260691

1 files changed, 0 insertions, 198 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonExpandPredSpillCode.cpp b/llvm/lib/Target/Hexagon/HexagonExpandPredSpillCode.cpp
deleted file mode 100644
index 3e24cd6da66..00000000000
--- a/llvm/lib/Target/Hexagon/HexagonExpandPredSpillCode.cpp
+++ /dev/null
@@ -1,198 +0,0 @@
-//===-- HexagonExpandPredSpillCode.cpp - Expand Predicate Spill Code ------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-// The Hexagon processor has no instructions that load or store predicate
-// registers directly.  So, when these registers must be spilled a general
-// purpose register must be found and the value copied to/from it from/to
-// the predicate register.  This code currently does not use the register
-// scavenger mechanism available in the allocator.  There are two registers
-// reserved to allow spilling/restoring predicate registers.  One is used to
-// hold the predicate value.  The other is used when stack frame offsets are
-// too large.
-//
-//===----------------------------------------------------------------------===//
-
-#include "Hexagon.h"
-#include "HexagonMachineFunctionInfo.h"
-#include "HexagonSubtarget.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/LatencyPriorityQueue.h"
-#include "llvm/CodeGen/MachineDominators.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineLoopInfo.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
-#include "llvm/CodeGen/SchedulerRegistry.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-
-using namespace llvm;
-
-
-namespace llvm {
-  FunctionPass *createHexagonExpandPredSpillCode();
-  void initializeHexagonExpandPredSpillCodePass(PassRegistry&);
-}
-
-
-namespace {
-
-class HexagonExpandPredSpillCode : public MachineFunctionPass {
- public:
-    static char ID;
-    HexagonExpandPredSpillCode() : MachineFunctionPass(ID) {
-      PassRegistry &Registry = *PassRegistry::getPassRegistry();
-      initializeHexagonExpandPredSpillCodePass(Registry);
-    }
-
-    const char *getPassName() const override {
-      return "Hexagon Expand Predicate Spill Code";
-    }
-    bool runOnMachineFunction(MachineFunction &Fn) override;
-};
-
-
-char HexagonExpandPredSpillCode::ID = 0;
-
-
-bool HexagonExpandPredSpillCode::runOnMachineFunction(MachineFunction &Fn) {
-
-  const HexagonSubtarget &QST = Fn.getSubtarget<HexagonSubtarget>();
-  const HexagonInstrInfo *TII = QST.getInstrInfo();
-
-  // Loop over all of the basic blocks.
-  for (MachineFunction::iterator MBBb = Fn.begin(), MBBe = Fn.end();
-       MBBb != MBBe; ++MBBb) {
-    MachineBasicBlock *MBB = &*MBBb;
-    // Traverse the basic block.
-    for (MachineBasicBlock::iterator MII = MBB->begin(); MII != MBB->end();
-         ++MII) {
-      MachineInstr *MI = MII;
-      int Opc = MI->getOpcode();
-      if (Opc == Hexagon::STriw_pred) {
-        // STriw_pred [R30], ofst, SrcReg;
-        unsigned FP = MI->getOperand(0).getReg();
-        assert(FP == QST.getRegisterInfo()->getFrameRegister() &&
-               "Not a Frame Pointer, Nor a Spill Slot");
-        assert(MI->getOperand(1).isImm() && "Not an offset");
-        int Offset = MI->getOperand(1).getImm();
-        int SrcReg = MI->getOperand(2).getReg();
-        assert(Hexagon::PredRegsRegClass.contains(SrcReg) &&
-               "Not a predicate register");
-        if (!TII->isValidOffset(Hexagon::S2_storeri_io, Offset)) {
-          if (!TII->isValidOffset(Hexagon::A2_addi, Offset)) {
-            BuildMI(*MBB, MII, MI->getDebugLoc(),
-                    TII->get(Hexagon::CONST32_Int_Real),
-                      HEXAGON_RESERVED_REG_1).addImm(Offset);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::A2_add),
-                    HEXAGON_RESERVED_REG_1)
-              .addReg(FP).addReg(HEXAGON_RESERVED_REG_1);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::C2_tfrpr),
-                      HEXAGON_RESERVED_REG_2).addReg(SrcReg);
-            BuildMI(*MBB, MII, MI->getDebugLoc(),
-                    TII->get(Hexagon::S2_storeri_io))
-              .addReg(HEXAGON_RESERVED_REG_1)
-              .addImm(0).addReg(HEXAGON_RESERVED_REG_2);
-          } else {
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::A2_addi),
-                      HEXAGON_RESERVED_REG_1).addReg(FP).addImm(Offset);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::C2_tfrpr),
-                      HEXAGON_RESERVED_REG_2).addReg(SrcReg);
-            BuildMI(*MBB, MII, MI->getDebugLoc(),
-                          TII->get(Hexagon::S2_storeri_io))
-              .addReg(HEXAGON_RESERVED_REG_1)
-              .addImm(0)
-              .addReg(HEXAGON_RESERVED_REG_2);
-          }
-        } else {
-          BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::C2_tfrpr),
-                    HEXAGON_RESERVED_REG_2).addReg(SrcReg);
-          BuildMI(*MBB, MII, MI->getDebugLoc(),
-                        TII->get(Hexagon::S2_storeri_io)).
-                    addReg(FP).addImm(Offset).addReg(HEXAGON_RESERVED_REG_2);
-        }
-        MII = MBB->erase(MI);
-        --MII;
-      } else if (Opc == Hexagon::LDriw_pred) {
-        // DstReg = LDriw_pred [R30], ofst.
-        int DstReg = MI->getOperand(0).getReg();
-        assert(Hexagon::PredRegsRegClass.contains(DstReg) &&
-               "Not a predicate register");
-        unsigned FP = MI->getOperand(1).getReg();
-        assert(FP == QST.getRegisterInfo()->getFrameRegister() &&
-               "Not a Frame Pointer, Nor a Spill Slot");
-        assert(MI->getOperand(2).isImm() && "Not an offset");
-        int Offset = MI->getOperand(2).getImm();
-        if (!TII->isValidOffset(Hexagon::L2_loadri_io, Offset)) {
-          if (!TII->isValidOffset(Hexagon::A2_addi, Offset)) {
-            BuildMI(*MBB, MII, MI->getDebugLoc(),
-                    TII->get(Hexagon::CONST32_Int_Real),
-                      HEXAGON_RESERVED_REG_1).addImm(Offset);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::A2_add),
-                    HEXAGON_RESERVED_REG_1)
-              .addReg(FP)
-              .addReg(HEXAGON_RESERVED_REG_1);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::L2_loadri_io),
-                      HEXAGON_RESERVED_REG_2)
-              .addReg(HEXAGON_RESERVED_REG_1)
-              .addImm(0);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::C2_tfrrp),
-                      DstReg).addReg(HEXAGON_RESERVED_REG_2);
-          } else {
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::A2_addi),
-                      HEXAGON_RESERVED_REG_1).addReg(FP).addImm(Offset);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::L2_loadri_io),
-                      HEXAGON_RESERVED_REG_2)
-              .addReg(HEXAGON_RESERVED_REG_1)
-              .addImm(0);
-            BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::C2_tfrrp),
-                      DstReg).addReg(HEXAGON_RESERVED_REG_2);
-          }
-        } else {
-          BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::L2_loadri_io),
-                    HEXAGON_RESERVED_REG_2).addReg(FP).addImm(Offset);
-          BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::C2_tfrrp),
-                    DstReg).addReg(HEXAGON_RESERVED_REG_2);
-        }
-        MII = MBB->erase(MI);
-        --MII;
-      }
-    }
-  }
-
-  return true;
-}
-
-}
-
-//===----------------------------------------------------------------------===//
-//                         Public Constructor Functions
-//===----------------------------------------------------------------------===//
-
-static void initializePassOnce(PassRegistry &Registry) {
-  const char *Name = "Hexagon Expand Predicate Spill Code";
-  PassInfo *PI = new PassInfo(Name, "hexagon-spill-pred",
-                              &HexagonExpandPredSpillCode::ID,
-                              nullptr, false, false);
-  Registry.registerPass(*PI, true);
-}
-
-void llvm::initializeHexagonExpandPredSpillCodePass(PassRegistry &Registry) {
-  CALL_ONCE_INITIALIZATION(initializePassOnce)
-}
-
-FunctionPass*
-llvm::createHexagonExpandPredSpillCode() {
-  return new HexagonExpandPredSpillCode();
-}