Mercurial > hg > truffle
annotate src/cpu/sparc/vm/dump_sparc.cpp @ 1634:60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
Summary: Execute IGVN optimization before and after Escape Analysis
Reviewed-by: never
author | kvn |
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date | Fri, 02 Jul 2010 17:30:30 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2004, 2009, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_dump_sparc.cpp.incl" | |
27 | |
28 | |
29 | |
30 // Generate the self-patching vtable method: | |
31 // | |
32 // This method will be called (as any other Klass virtual method) with | |
33 // the Klass itself as the first argument. Example: | |
34 // | |
35 // oop obj; | |
36 // int size = obj->klass()->klass_part()->oop_size(this); | |
37 // | |
38 // for which the virtual method call is Klass::oop_size(); | |
39 // | |
40 // The dummy method is called with the Klass object as the first | |
41 // operand, and an object as the second argument. | |
42 // | |
43 | |
44 //===================================================================== | |
45 | |
46 // All of the dummy methods in the vtable are essentially identical, | |
47 // differing only by an ordinal constant, and they bear no releationship | |
48 // to the original method which the caller intended. Also, there needs | |
49 // to be 'vtbl_list_size' instances of the vtable in order to | |
50 // differentiate between the 'vtable_list_size' original Klass objects. | |
51 | |
52 #define __ masm-> | |
53 | |
54 void CompactingPermGenGen::generate_vtable_methods(void** vtbl_list, | |
55 void** vtable, | |
56 char** md_top, | |
57 char* md_end, | |
58 char** mc_top, | |
59 char* mc_end) { | |
60 | |
61 intptr_t vtable_bytes = (num_virtuals * vtbl_list_size) * sizeof(void*); | |
62 *(intptr_t *)(*md_top) = vtable_bytes; | |
63 *md_top += sizeof(intptr_t); | |
64 void** dummy_vtable = (void**)*md_top; | |
65 *vtable = dummy_vtable; | |
66 *md_top += vtable_bytes; | |
67 | |
68 guarantee(*md_top <= md_end, "Insufficient space for vtables."); | |
69 | |
70 // Get ready to generate dummy methods. | |
71 | |
72 CodeBuffer cb((unsigned char*)*mc_top, mc_end - *mc_top); | |
73 MacroAssembler* masm = new MacroAssembler(&cb); | |
74 | |
75 Label common_code; | |
76 for (int i = 0; i < vtbl_list_size; ++i) { | |
77 for (int j = 0; j < num_virtuals; ++j) { | |
78 dummy_vtable[num_virtuals * i + j] = (void*)masm->pc(); | |
79 __ save(SP, -256, SP); | |
80 __ brx(Assembler::always, false, Assembler::pt, common_code); | |
81 | |
82 // Load L0 with a value indicating vtable/offset pair. | |
83 // -- bits[ 7..0] (8 bits) which virtual method in table? | |
84 // -- bits[12..8] (5 bits) which virtual method table? | |
85 // -- must fit in 13-bit instruction immediate field. | |
86 __ delayed()->set((i << 8) + j, L0); | |
87 } | |
88 } | |
89 | |
90 __ bind(common_code); | |
91 | |
92 // Expecting to be called with the "this" pointer in O0/I0 (where | |
93 // "this" is a Klass object). In addition, L0 was set (above) to | |
94 // identify the method and table. | |
95 | |
96 // Look up the correct vtable pointer. | |
97 | |
98 __ set((intptr_t)vtbl_list, L2); // L2 = address of new vtable list. | |
99 __ srl(L0, 8, L3); // Isolate L3 = vtable identifier. | |
100 __ sll(L3, LogBytesPerWord, L3); | |
101 __ ld_ptr(L2, L3, L3); // L3 = new (correct) vtable pointer. | |
102 __ st_ptr(L3, Address(I0, 0)); // Save correct vtable ptr in entry. | |
103 | |
104 // Restore registers and jump to the correct method; | |
105 | |
106 __ and3(L0, 255, L4); // Isolate L3 = method offset;. | |
107 __ sll(L4, LogBytesPerWord, L4); | |
108 __ ld_ptr(L3, L4, L4); // Get address of correct virtual method | |
727 | 109 __ jmpl(L4, 0, G0); // Jump to correct method. |
0 | 110 __ delayed()->restore(); // Restore registers. |
111 | |
112 __ flush(); | |
113 *mc_top = (char*)__ pc(); | |
114 | |
115 guarantee(*mc_top <= mc_end, "Insufficient space for method wrappers."); | |
116 } |