Mercurial > hg > truffle
annotate src/share/vm/opto/regalloc.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) 2000, 2006, Oracle and/or its affiliates. All rights reserved. |
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| 13 * accompanied this code). | |
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| 15 * You should have received a copy of the GNU General Public License version | |
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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 | |
| 25 class Node; | |
| 26 class Matcher; | |
| 27 class PhaseCFG; | |
| 28 | |
| 29 #define MAX_REG_ALLOCATORS 10 | |
| 30 | |
| 31 //------------------------------PhaseRegAlloc------------------------------------ | |
| 32 // Abstract register allocator | |
| 33 class PhaseRegAlloc : public Phase { | |
| 34 static void (*_alloc_statistics[MAX_REG_ALLOCATORS])(); | |
| 35 static int _num_allocators; | |
| 36 | |
| 37 protected: | |
| 38 OptoRegPair *_node_regs; | |
| 39 uint _node_regs_max_index; | |
| 40 VectorSet _node_oops; // Mapping from node indices to oopiness | |
| 41 | |
| 42 void alloc_node_regs(int size); // allocate _node_regs table with at least "size" elements | |
| 43 | |
| 44 PhaseRegAlloc( uint unique, PhaseCFG &cfg, Matcher &matcher, | |
| 45 void (*pr_stats)()); | |
| 46 public: | |
| 47 PhaseCFG &_cfg; // Control flow graph | |
| 48 uint _framesize; // Size of frame in stack-slots. not counting preserve area | |
| 49 OptoReg::Name _max_reg; // Past largest register seen | |
| 50 Matcher &_matcher; // Convert Ideal to MachNodes | |
| 51 uint node_regs_max_index() const { return _node_regs_max_index; } | |
| 52 | |
| 53 // Get the register associated with the Node | |
| 54 OptoReg::Name get_reg_first( const Node *n ) const { | |
| 55 debug_only( if( n->_idx >= _node_regs_max_index ) n->dump(); ); | |
| 56 assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 57 return _node_regs[n->_idx].first(); | |
| 58 } | |
| 59 OptoReg::Name get_reg_second( const Node *n ) const { | |
| 60 debug_only( if( n->_idx >= _node_regs_max_index ) n->dump(); ); | |
| 61 assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 62 return _node_regs[n->_idx].second(); | |
| 63 } | |
| 64 | |
| 65 // Do all the real work of allocate | |
| 66 virtual void Register_Allocate() = 0; | |
| 67 | |
| 68 | |
| 69 // notify the register allocator that "node" is a new reference | |
| 70 // to the value produced by "old_node" | |
| 71 virtual void add_reference( const Node *node, const Node *old_node) = 0; | |
| 72 | |
| 73 | |
| 74 // Set the register associated with a new Node | |
| 75 void set_bad( uint idx ) { | |
| 76 assert( idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 77 _node_regs[idx].set_bad(); | |
| 78 } | |
| 79 void set1( uint idx, OptoReg::Name reg ) { | |
| 80 assert( idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 81 _node_regs[idx].set1(reg); | |
| 82 } | |
| 83 void set2( uint idx, OptoReg::Name reg ) { | |
| 84 assert( idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 85 _node_regs[idx].set2(reg); | |
| 86 } | |
| 87 void set_pair( uint idx, OptoReg::Name hi, OptoReg::Name lo ) { | |
| 88 assert( idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 89 _node_regs[idx].set_pair(hi, lo); | |
| 90 } | |
| 91 void set_ptr( uint idx, OptoReg::Name reg ) { | |
| 92 assert( idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 93 _node_regs[idx].set_ptr(reg); | |
| 94 } | |
| 95 // Set and query if a node produces an oop | |
| 96 void set_oop( const Node *n, bool ); | |
| 97 bool is_oop( const Node *n ) const; | |
| 98 | |
| 99 // Convert a register number to a stack offset | |
| 100 int reg2offset ( OptoReg::Name reg ) const; | |
| 101 int reg2offset_unchecked( OptoReg::Name reg ) const; | |
| 102 | |
| 103 // Convert a stack offset to a register number | |
| 104 OptoReg::Name offset2reg( int stk_offset ) const; | |
| 105 | |
| 106 // Get the register encoding associated with the Node | |
| 107 int get_encode( const Node *n ) const { | |
| 108 assert( n->_idx < _node_regs_max_index, "Exceeded _node_regs array"); | |
| 109 OptoReg::Name first = _node_regs[n->_idx].first(); | |
| 110 OptoReg::Name second = _node_regs[n->_idx].second(); | |
| 111 assert( !OptoReg::is_valid(second) || second == first+1, "" ); | |
| 112 assert(OptoReg::is_reg(first), "out of range"); | |
| 113 return Matcher::_regEncode[first]; | |
| 114 } | |
| 115 | |
| 116 // Platform dependent hook for actions prior to allocation | |
| 117 void pd_preallocate_hook(); | |
| 118 | |
| 119 #ifdef ASSERT | |
| 120 // Platform dependent hook for verification after allocation. Will | |
| 121 // only get called when compiling with asserts. | |
| 122 void pd_postallocate_verify_hook(); | |
| 123 #endif | |
| 124 | |
| 125 #ifndef PRODUCT | |
| 126 static int _total_framesize; | |
| 127 static int _max_framesize; | |
| 128 | |
| 129 virtual void dump_frame() const = 0; | |
| 130 virtual char *dump_register( const Node *n, char *buf ) const = 0; | |
| 131 static void print_statistics(); | |
| 132 #endif | |
| 133 }; |