Mercurial > hg > truffle
annotate src/share/vm/opto/multnode.cpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Mon, 15 Apr 2013 19:54:58 +0200 |
parents | da91efe96a93 |
children | 6f3fd5150b67 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * This code is free software; you can redistribute it and/or modify it | |
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12 * version 2 for more details (a copy is included in the LICENSE file that | |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "opto/matcher.hpp" | |
27 #include "opto/multnode.hpp" | |
28 #include "opto/opcodes.hpp" | |
29 #include "opto/phaseX.hpp" | |
30 #include "opto/regmask.hpp" | |
31 #include "opto/type.hpp" | |
0 | 32 |
33 //============================================================================= | |
34 //------------------------------MultiNode-------------------------------------- | |
35 const RegMask &MultiNode::out_RegMask() const { | |
36 return RegMask::Empty; | |
37 } | |
38 | |
39 Node *MultiNode::match( const ProjNode *proj, const Matcher *m ) { return proj->clone(); } | |
40 | |
41 //------------------------------proj_out--------------------------------------- | |
42 // Get a named projection | |
43 ProjNode* MultiNode::proj_out(uint which_proj) const { | |
44 assert(Opcode() != Op_If || which_proj == (uint)true || which_proj == (uint)false, "must be 1 or 0"); | |
45 assert(Opcode() != Op_If || outcnt() == 2, "bad if #1"); | |
46 for( DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++ ) { | |
47 Node *p = fast_out(i); | |
48 if( !p->is_Proj() ) { | |
49 assert(p == this && this->is_Start(), "else must be proj"); | |
50 continue; | |
51 } | |
52 ProjNode *proj = p->as_Proj(); | |
53 if( proj->_con == which_proj ) { | |
54 assert(Opcode() != Op_If || proj->Opcode() == (which_proj?Op_IfTrue:Op_IfFalse), "bad if #2"); | |
55 return proj; | |
56 } | |
57 } | |
58 return NULL; | |
59 } | |
60 | |
61 //============================================================================= | |
62 //------------------------------ProjNode--------------------------------------- | |
63 uint ProjNode::hash() const { | |
64 // only one input | |
65 return (uintptr_t)in(TypeFunc::Control) + (_con << 1) + (_is_io_use ? 1 : 0); | |
66 } | |
67 uint ProjNode::cmp( const Node &n ) const { return _con == ((ProjNode&)n)._con && ((ProjNode&)n)._is_io_use == _is_io_use; } | |
68 uint ProjNode::size_of() const { return sizeof(ProjNode); } | |
69 | |
70 // Test if we propagate interesting control along this projection | |
71 bool ProjNode::is_CFG() const { | |
72 Node *def = in(0); | |
73 return (_con == TypeFunc::Control && def->is_CFG()); | |
74 } | |
75 | |
76 const Type *ProjNode::bottom_type() const { | |
77 if (in(0) == NULL) return Type::TOP; | |
78 const Type *tb = in(0)->bottom_type(); | |
79 if( tb == Type::TOP ) return Type::TOP; | |
80 if( tb == Type::BOTTOM ) return Type::BOTTOM; | |
81 const TypeTuple *t = tb->is_tuple(); | |
82 return t->field_at(_con); | |
83 } | |
84 | |
85 const TypePtr *ProjNode::adr_type() const { | |
86 if (bottom_type() == Type::MEMORY) { | |
87 // in(0) might be a narrow MemBar; otherwise we will report TypePtr::BOTTOM | |
88 const TypePtr* adr_type = in(0)->adr_type(); | |
89 #ifdef ASSERT | |
90 if (!is_error_reported() && !Node::in_dump()) | |
91 assert(adr_type != NULL, "source must have adr_type"); | |
92 #endif | |
93 return adr_type; | |
94 } | |
95 assert(bottom_type()->base() != Type::Memory, "no other memories?"); | |
96 return NULL; | |
97 } | |
98 | |
99 bool ProjNode::pinned() const { return in(0)->pinned(); } | |
100 #ifndef PRODUCT | |
101 void ProjNode::dump_spec(outputStream *st) const { st->print("#%d",_con); if(_is_io_use) st->print(" (i_o_use)");} | |
102 #endif | |
103 | |
104 //----------------------------check_con---------------------------------------- | |
105 void ProjNode::check_con() const { | |
106 Node* n = in(0); | |
107 if (n == NULL) return; // should be assert, but NodeHash makes bogons | |
108 if (n->is_Mach()) return; // mach. projs. are not type-safe | |
109 if (n->is_Start()) return; // alas, starts can have mach. projs. also | |
110 if (_con == SCMemProjNode::SCMEMPROJCON ) return; | |
111 const Type* t = n->bottom_type(); | |
112 if (t == Type::TOP) return; // multi is dead | |
113 assert(_con < t->is_tuple()->cnt(), "ProjNode::_con must be in range"); | |
114 } | |
115 | |
116 //------------------------------Value------------------------------------------ | |
117 const Type *ProjNode::Value( PhaseTransform *phase ) const { | |
118 if( !in(0) ) return Type::TOP; | |
119 const Type *t = phase->type(in(0)); | |
120 if( t == Type::TOP ) return t; | |
121 if( t == Type::BOTTOM ) return t; | |
122 return t->is_tuple()->field_at(_con); | |
123 } | |
124 | |
125 //------------------------------out_RegMask------------------------------------ | |
126 // Pass the buck uphill | |
127 const RegMask &ProjNode::out_RegMask() const { | |
128 return RegMask::Empty; | |
129 } | |
130 | |
131 //------------------------------ideal_reg-------------------------------------- | |
132 uint ProjNode::ideal_reg() const { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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1972
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133 return bottom_type()->ideal_reg(); |
0 | 134 } |