Mercurial > hg > truffle
annotate src/share/vm/opto/live.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
| author | johnc |
|---|---|
| date | Wed, 18 Aug 2010 10:59:06 -0700 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2005, 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 class Block; | |
| 26 class LRG_List; | |
| 27 class PhaseCFG; | |
| 28 class VectorSet; | |
| 29 class IndexSet; | |
| 30 | |
| 31 //------------------------------PhaseLive-------------------------------------- | |
| 32 // Compute live-in/live-out | |
| 33 class PhaseLive : public Phase { | |
| 34 // Array of Sets of values live at the start of a block. | |
| 35 // Indexed by block pre-order number. | |
| 36 IndexSet *_live; | |
| 37 | |
| 38 // Array of Sets of values defined locally in the block | |
| 39 // Indexed by block pre-order number. | |
| 40 IndexSet *_defs; | |
| 41 | |
| 42 // Array of delta-set pointers, indexed by block pre-order number | |
| 43 IndexSet **_deltas; | |
| 44 IndexSet *_free_IndexSet; // Free list of same | |
| 45 | |
| 46 Block_List *_worklist; // Worklist for iterative solution | |
| 47 | |
| 48 const PhaseCFG &_cfg; // Basic blocks | |
| 49 LRG_List &_names; // Mapping from Nodes to live ranges | |
| 50 uint _maxlrg; // Largest live-range number | |
| 51 Arena *_arena; | |
| 52 | |
| 53 IndexSet *getset( Block *p ); | |
| 54 IndexSet *getfreeset( ); | |
| 55 void freeset( const Block *p ); | |
| 56 void add_liveout( Block *p, uint r, VectorSet &first_pass ); | |
| 57 void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass ); | |
| 58 | |
| 59 public: | |
| 60 PhaseLive( const PhaseCFG &cfg, LRG_List &names, Arena *arena ); | |
| 61 ~PhaseLive() {} | |
| 62 // Compute liveness info | |
| 63 void compute(uint maxlrg); | |
| 64 // Reset arena storage | |
| 65 void reset() { _live = NULL; } | |
| 66 | |
| 67 // Return the live-out set for this block | |
| 68 IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; } | |
| 69 | |
| 70 #ifndef PRODUCT | |
| 71 void dump( const Block *b ) const; | |
| 72 void stats(uint iters) const; | |
| 73 #endif | |
| 74 }; |