Mercurial > hg > graal-compiler
annotate src/share/vm/opto/regalloc.hpp @ 1585:49fac4acd688
6958485: fix for 6879921 was insufficient
Reviewed-by: kvn
author | never |
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date | Mon, 07 Jun 2010 14:17:01 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved. |
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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 }; |