Mercurial > hg > truffle
annotate src/share/vm/c1/c1_Canonicalizer.hpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | 55fb97c4c58d |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
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2 * Copyright (c) 1999, 2013, 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 | |
| 1972 | 25 #ifndef SHARE_VM_C1_C1_CANONICALIZER_HPP |
| 26 #define SHARE_VM_C1_C1_CANONICALIZER_HPP | |
| 27 | |
| 28 #include "c1/c1_Instruction.hpp" | |
| 29 | |
| 0 | 30 class Canonicalizer: InstructionVisitor { |
| 31 private: | |
| 1783 | 32 Compilation *_compilation; |
| 0 | 33 Instruction* _canonical; |
| 34 int _bci; | |
| 35 | |
| 1783 | 36 Compilation *compilation() { return _compilation; } |
| 0 | 37 void set_canonical(Value x); |
| 38 void set_bci(int bci) { _bci = bci; } | |
| 39 void set_constant(jint x) { set_canonical(new Constant(new IntConstant(x))); } | |
| 40 void set_constant(jlong x) { set_canonical(new Constant(new LongConstant(x))); } | |
| 41 void set_constant(jfloat x) { set_canonical(new Constant(new FloatConstant(x))); } | |
| 42 void set_constant(jdouble x) { set_canonical(new Constant(new DoubleConstant(x))); } | |
| 43 void move_const_to_right(Op2* x); | |
| 44 void do_Op2(Op2* x); | |
| 45 void do_UnsafeRawOp(UnsafeRawOp* x); | |
| 46 | |
| 47 void unsafe_raw_match(UnsafeRawOp* x, | |
| 48 Instruction** base, | |
| 49 Instruction** index, | |
| 50 int* scale); | |
| 51 | |
| 52 public: | |
| 1783 | 53 Canonicalizer(Compilation* c, Value x, int bci) : _compilation(c), _canonical(x), _bci(bci) { |
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7104177: Tiered: -XX:+PrintCanonicalization doesn't work with -XX:+TieredCompilation
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54 NOT_PRODUCT(x->set_printable_bci(bci)); |
| 1783 | 55 if (CanonicalizeNodes) x->visit(this); |
| 56 } | |
| 0 | 57 Value canonical() const { return _canonical; } |
| 58 int bci() const { return _bci; } | |
| 59 | |
| 60 virtual void do_Phi (Phi* x); | |
| 61 virtual void do_Constant (Constant* x); | |
| 62 virtual void do_Local (Local* x); | |
| 63 virtual void do_LoadField (LoadField* x); | |
| 64 virtual void do_StoreField (StoreField* x); | |
| 65 virtual void do_ArrayLength (ArrayLength* x); | |
| 66 virtual void do_LoadIndexed (LoadIndexed* x); | |
| 67 virtual void do_StoreIndexed (StoreIndexed* x); | |
| 68 virtual void do_NegateOp (NegateOp* x); | |
| 69 virtual void do_ArithmeticOp (ArithmeticOp* x); | |
| 70 virtual void do_ShiftOp (ShiftOp* x); | |
| 71 virtual void do_LogicOp (LogicOp* x); | |
| 72 virtual void do_CompareOp (CompareOp* x); | |
| 73 virtual void do_IfOp (IfOp* x); | |
| 74 virtual void do_IfInstanceOf (IfInstanceOf* x); | |
| 75 virtual void do_Convert (Convert* x); | |
| 76 virtual void do_NullCheck (NullCheck* x); | |
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77 virtual void do_TypeCast (TypeCast* x); |
| 0 | 78 virtual void do_Invoke (Invoke* x); |
| 79 virtual void do_NewInstance (NewInstance* x); | |
| 80 virtual void do_NewTypeArray (NewTypeArray* x); | |
| 81 virtual void do_NewObjectArray (NewObjectArray* x); | |
| 82 virtual void do_NewMultiArray (NewMultiArray* x); | |
| 83 virtual void do_CheckCast (CheckCast* x); | |
| 84 virtual void do_InstanceOf (InstanceOf* x); | |
| 85 virtual void do_MonitorEnter (MonitorEnter* x); | |
| 86 virtual void do_MonitorExit (MonitorExit* x); | |
| 87 virtual void do_Intrinsic (Intrinsic* x); | |
| 88 virtual void do_BlockBegin (BlockBegin* x); | |
| 89 virtual void do_Goto (Goto* x); | |
| 90 virtual void do_If (If* x); | |
| 91 virtual void do_TableSwitch (TableSwitch* x); | |
| 92 virtual void do_LookupSwitch (LookupSwitch* x); | |
| 93 virtual void do_Return (Return* x); | |
| 94 virtual void do_Throw (Throw* x); | |
| 95 virtual void do_Base (Base* x); | |
| 96 virtual void do_OsrEntry (OsrEntry* x); | |
| 97 virtual void do_ExceptionObject(ExceptionObject* x); | |
| 98 virtual void do_RoundFP (RoundFP* x); | |
| 99 virtual void do_UnsafeGetRaw (UnsafeGetRaw* x); | |
| 100 virtual void do_UnsafePutRaw (UnsafePutRaw* x); | |
| 101 virtual void do_UnsafeGetObject(UnsafeGetObject* x); | |
| 102 virtual void do_UnsafePutObject(UnsafePutObject* x); | |
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103 virtual void do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x); |
| 0 | 104 virtual void do_UnsafePrefetchRead (UnsafePrefetchRead* x); |
| 105 virtual void do_UnsafePrefetchWrite(UnsafePrefetchWrite* x); | |
| 106 virtual void do_ProfileCall (ProfileCall* x); | |
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107 virtual void do_ProfileReturnType (ProfileReturnType* x); |
| 1783 | 108 virtual void do_ProfileInvoke (ProfileInvoke* x); |
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109 virtual void do_RuntimeCall (RuntimeCall* x); |
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110 virtual void do_MemBar (MemBar* x); |
| 8860 | 111 virtual void do_RangeCheckPredicate(RangeCheckPredicate* x); |
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8011648: C1: optimized build is broken after 7153771
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112 #ifdef ASSERT |
| 8860 | 113 virtual void do_Assert (Assert* x); |
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8011648: C1: optimized build is broken after 7153771
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114 #endif |
| 0 | 115 }; |
| 1972 | 116 |
| 117 #endif // SHARE_VM_C1_C1_CANONICALIZER_HPP |