rev 13183 : 8183232: Avoid resolving method_kind in AbstractInterpreter::can_be_compiled
Reviewed-by: coleenp, mdoerr, neliasso

   1 /*
   2  * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2015 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "interpreter/interpreter.hpp"
  28 #include "oops/constMethod.hpp"
  29 #include "oops/method.hpp"
  30 #include "runtime/frame.inline.hpp"
  31 #include "utilities/debug.hpp"
  32 #include "utilities/macros.hpp"
  33 
  34 int AbstractInterpreter::BasicType_as_index(BasicType type) {
  35   int i = 0;
  36   switch (type) {
  37     case T_BOOLEAN: i = 0; break;
  38     case T_CHAR   : i = 1; break;
  39     case T_BYTE   : i = 2; break;
  40     case T_SHORT  : i = 3; break;
  41     case T_INT    : i = 4; break;
  42     case T_LONG   : i = 5; break;
  43     case T_VOID   : i = 6; break;
  44     case T_FLOAT  : i = 7; break;
  45     case T_DOUBLE : i = 8; break;
  46     case T_OBJECT : i = 9; break;
  47     case T_ARRAY  : i = 9; break;
  48     default       : ShouldNotReachHere();
  49   }
  50   assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
  51   return i;
  52 }
  53 
  54 // These should never be compiled since the interpreter will prefer
  55 // the compiled version to the intrinsic version.
  56 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
  57   switch (method_kind(m)) {
  58     case Interpreter::java_lang_math_sin     : // fall thru
  59     case Interpreter::java_lang_math_cos     : // fall thru
  60     case Interpreter::java_lang_math_tan     : // fall thru
  61     case Interpreter::java_lang_math_abs     : // fall thru
  62     case Interpreter::java_lang_math_log     : // fall thru
  63     case Interpreter::java_lang_math_log10   : // fall thru
  64     case Interpreter::java_lang_math_sqrt    : // fall thru
  65     case Interpreter::java_lang_math_pow     : // fall thru
  66     case Interpreter::java_lang_math_exp     : // fall thru
  67     case Interpreter::java_lang_math_fmaD    : // fall thru
  68     case Interpreter::java_lang_math_fmaF    :
  69       return false;
  70     default:
  71       return true;
  72   }
  73 }
  74 
  75 // How much stack a method activation needs in stack slots.
  76 // We must calc this exactly like in generate_fixed_frame.
  77 // Note: This returns the conservative size assuming maximum alignment.
  78 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
  79   const int max_alignment_size = 2;
  80   const int abi_scratch = frame::abi_reg_args_size;
  81   return method->max_locals() + method->max_stack() +
  82          frame::interpreter_frame_monitor_size() + max_alignment_size + abi_scratch;
  83 }
  84 
  85 // Returns number of stackElementWords needed for the interpreter frame with the
  86 // given sections.
  87 // This overestimates the stack by one slot in case of alignments.
  88 int AbstractInterpreter::size_activation(int max_stack,
  89                                          int temps,
  90                                          int extra_args,
  91                                          int monitors,
  92                                          int callee_params,
  93                                          int callee_locals,
  94                                          bool is_top_frame) {
  95   // Note: This calculation must exactly parallel the frame setup
  96   // in TemplateInterpreterGenerator::generate_fixed_frame.
  97   assert(Interpreter::stackElementWords == 1, "sanity");
  98   const int max_alignment_space = StackAlignmentInBytes / Interpreter::stackElementSize;
  99   const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) :
 100                                          (frame::abi_minframe_size / Interpreter::stackElementSize);
 101   const int size =
 102     max_stack                                                +
 103     (callee_locals - callee_params)                          +
 104     monitors * frame::interpreter_frame_monitor_size()       +
 105     max_alignment_space                                      +
 106     abi_scratch                                              +
 107     frame::ijava_state_size / Interpreter::stackElementSize;
 108 
 109   // Fixed size of an interpreter frame, align to 16-byte.
 110   return (size & -2);
 111 }
 112 
 113 // Fills a sceletal interpreter frame generated during deoptimizations.
 114 //
 115 // Parameters:
 116 //
 117 // interpreter_frame != NULL:
 118 //   set up the method, locals, and monitors.
 119 //   The frame interpreter_frame, if not NULL, is guaranteed to be the
 120 //   right size, as determined by a previous call to this method.
 121 //   It is also guaranteed to be walkable even though it is in a skeletal state
 122 //
 123 // is_top_frame == true:
 124 //   We're processing the *oldest* interpreter frame!
 125 //
 126 // pop_frame_extra_args:
 127 //   If this is != 0 we are returning to a deoptimized frame by popping
 128 //   off the callee frame. We want to re-execute the call that called the
 129 //   callee interpreted, but since the return to the interpreter would pop
 130 //   the arguments off advance the esp by dummy popframe_extra_args slots.
 131 //   Popping off those will establish the stack layout as it was before the call.
 132 //
 133 void AbstractInterpreter::layout_activation(Method* method,
 134                                             int tempcount,
 135                                             int popframe_extra_args,
 136                                             int moncount,
 137                                             int caller_actual_parameters,
 138                                             int callee_param_count,
 139                                             int callee_locals_count,
 140                                             frame* caller,
 141                                             frame* interpreter_frame,
 142                                             bool is_top_frame,
 143                                             bool is_bottom_frame) {
 144 
 145   const int abi_scratch = is_top_frame ? (frame::abi_reg_args_size / Interpreter::stackElementSize) :
 146                                          (frame::abi_minframe_size / Interpreter::stackElementSize);
 147 
 148   intptr_t* locals_base  = (caller->is_interpreted_frame()) ?
 149     caller->interpreter_frame_esp() + caller_actual_parameters :
 150     caller->sp() + method->max_locals() - 1 + (frame::abi_minframe_size / Interpreter::stackElementSize);
 151 
 152   intptr_t* monitor_base = caller->sp() - frame::ijava_state_size / Interpreter::stackElementSize;
 153   intptr_t* monitor      = monitor_base - (moncount * frame::interpreter_frame_monitor_size());
 154   intptr_t* esp_base     = monitor - 1;
 155   intptr_t* esp          = esp_base - tempcount - popframe_extra_args;
 156   intptr_t* sp           = (intptr_t *) (((intptr_t) (esp_base - callee_locals_count + callee_param_count - method->max_stack()- abi_scratch)) & -StackAlignmentInBytes);
 157   intptr_t* sender_sp    = caller->sp() + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize;
 158   intptr_t* top_frame_sp = is_top_frame ? sp : sp + (frame::abi_minframe_size - frame::abi_reg_args_size) / Interpreter::stackElementSize;
 159 
 160   interpreter_frame->interpreter_frame_set_method(method);
 161   interpreter_frame->interpreter_frame_set_mirror(method->method_holder()->java_mirror());
 162   interpreter_frame->interpreter_frame_set_locals(locals_base);
 163   interpreter_frame->interpreter_frame_set_cpcache(method->constants()->cache());
 164   interpreter_frame->interpreter_frame_set_esp(esp);
 165   interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor);
 166   interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp);
 167   if (!is_bottom_frame) {
 168     interpreter_frame->interpreter_frame_set_sender_sp(sender_sp);
 169   }
 170 }
--- EOF ---