[turbofan] Remove dead code in {OutOfLineRecordWrite}.

R=ulan@chromium.org
BUG=v8:8238

Change-Id: Idf6b3d4035b392dd1b20ff3e4cbdb60cdaada054
Reviewed-on: https://chromium-review.googlesource.com/c/1297325Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56951}

src/compiler/ia32/code-generator-ia32.cc

@@ -282,24 +282,6 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
         mode_(mode),
         zone_(gen->zone()) {}
 
-  void SaveRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        __ push(Register::from_code(i));
-      }
-    }
-  }
-
-  void RestoreRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    for (int i = Register::kNumRegisters - 1; i >= 0; --i) {
-      if ((registers >> i) & 1u) {
-        __ pop(Register::from_code(i));
-      }
-    }
-  }
-
   void Generate() final {
     if (mode_ > RecordWriteMode::kValueIsPointer) {
       __ JumpIfSmi(value_, exit());

src/compiler/mips/code-generator-mips.cc

@@ -155,28 +155,6 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
         must_save_lr_(!gen->frame_access_state()->has_frame()),
         zone_(gen->zone()) {}
 
-  void SaveRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-    __ MultiPush(regs | ra.bit());
-  }
-
-  void RestoreRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-    __ MultiPop(regs | ra.bit());
-  }
-
   void Generate() final {
     if (mode_ > RecordWriteMode::kValueIsPointer) {
       __ JumpIfSmi(value_, exit());

src/compiler/mips64/code-generator-mips64.cc

@@ -158,28 +158,6 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
         must_save_lr_(!gen->frame_access_state()->has_frame()),
         zone_(gen->zone()) {}
 
-  void SaveRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-    __ MultiPush(regs | ra.bit());
-  }
-
-  void RestoreRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-    __ MultiPop(regs | ra.bit());
-  }
-
   void Generate() final {
     if (mode_ > RecordWriteMode::kValueIsPointer) {
       __ JumpIfSmi(value_, exit());

src/compiler/ppc/code-generator-ppc.cc

@@ -155,29 +155,6 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
         must_save_lr_(!gen->frame_access_state()->has_frame()),
         zone_(gen->zone()) {}
 
-  void SaveRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-
-    __ MultiPush(regs);
-  }
-
-  void RestoreRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-    __ MultiPop(regs);
-  }
-
   void Generate() final {
     ConstantPoolUnavailableScope constant_pool_unavailable(tasm());
     if (mode_ > RecordWriteMode::kValueIsPointer) {

src/compiler/s390/code-generator-s390.cc

@@ -191,28 +191,6 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
         must_save_lr_(!gen->frame_access_state()->has_frame()),
         zone_(gen->zone()) {}
 
-  void SaveRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-    __ MultiPush(regs | r14.bit());
-  }
-
-  void RestoreRegisters(RegList registers) {
-    DCHECK_LT(0, NumRegs(registers));
-    RegList regs = 0;
-    for (int i = 0; i < Register::kNumRegisters; ++i) {
-      if ((registers >> i) & 1u) {
-        regs |= Register::from_code(i).bit();
-      }
-    }
-    __ MultiPop(regs | r14.bit());
-  }
-
   void Generate() final {
     if (mode_ > RecordWriteMode::kValueIsPointer) {
       __ JumpIfSmi(value_, exit());