src/cpu/x86/vm/c1_LIRGenerator_x86.cpp

*** 232,243 ****
  void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) {
    __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info);
  }
  
  
! bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) {
!   if (tmp->is_valid()) {
      if (is_power_of_2(c + 1)) {
        __ move(left, tmp);
        __ shift_left(left, log2_intptr(c + 1), left);
        __ sub(left, tmp, result);
        return true;
--- 232,243 ----
  void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) {
    __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info);
  }
  
  
! bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, jint c, LIR_Opr result, LIR_Opr tmp) {
!   if (tmp->is_valid() && c > 0 && c < max_jint) {
      if (is_power_of_2(c + 1)) {
        __ move(left, tmp);
        __ shift_left(left, log2_intptr(c + 1), left);
        __ sub(left, tmp, result);
        return true;
*** 601,612 ****
      if (x->op() == Bytecodes::_imul ) {
        // check if we can use shift instead
        bool use_constant = false;
        bool use_tmp = false;
        if (right_arg->is_constant()) {
!         int iconst = right_arg->get_jint_constant();
!         if (iconst > 0) {
            if (is_power_of_2(iconst)) {
              use_constant = true;
            } else if (is_power_of_2(iconst - 1) || is_power_of_2(iconst + 1)) {
              use_constant = true;
              use_tmp = true;
--- 601,612 ----
      if (x->op() == Bytecodes::_imul ) {
        // check if we can use shift instead
        bool use_constant = false;
        bool use_tmp = false;
        if (right_arg->is_constant()) {
!         jint iconst = right_arg->get_jint_constant();
!         if (iconst > 0 && iconst < max_jint) {
            if (is_power_of_2(iconst)) {
              use_constant = true;
            } else if (is_power_of_2(iconst - 1) || is_power_of_2(iconst + 1)) {
              use_constant = true;
              use_tmp = true;