142 * @param branch_loc the locator of the branch instruction in the code buffer
143 */
144 void add_patch_at(CodeBuffer* cb, int branch_loc);
145
146 /**
147 * Iterate over the list of patches, resolving the instructions
148 * Call patch_instruction on each 'branch_loc' value
149 */
150 void patch_instructions(MacroAssembler* masm);
151
152 void init() {
153 _loc = -1;
154 _patch_index = 0;
155 _patch_overflow = NULL;
156 _is_near = false;
157 }
158
159 Label() {
160 init();
161 }
162 };
163
164 // A NearLabel must be bound to a location near its users. Users can
165 // optimize on this information, e.g. generate short branches.
166 class NearLabel : public Label {
167 public:
168 NearLabel() : Label() { _is_near = true; }
169 };
170
171 // A union type for code which has to assemble both constant and
172 // non-constant operands, when the distinction cannot be made
173 // statically.
174 class RegisterOrConstant {
175 private:
176 Register _r;
177 intptr_t _c;
178
179 public:
180 RegisterOrConstant(): _r(noreg), _c(0) {}
181 RegisterOrConstant(Register r): _r(r), _c(0) {}
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142 * @param branch_loc the locator of the branch instruction in the code buffer
143 */
144 void add_patch_at(CodeBuffer* cb, int branch_loc);
145
146 /**
147 * Iterate over the list of patches, resolving the instructions
148 * Call patch_instruction on each 'branch_loc' value
149 */
150 void patch_instructions(MacroAssembler* masm);
151
152 void init() {
153 _loc = -1;
154 _patch_index = 0;
155 _patch_overflow = NULL;
156 _is_near = false;
157 }
158
159 Label() {
160 init();
161 }
162
163 ~Label() {
164 assert(is_bound() || is_unused(), "Label was never bound to a location, but it was used as a jmp target");
165 }
166
167 void reset() {
168 init(); //leave _patch_overflow because it points to CodeBuffer.
169 }
170 };
171
172 // A NearLabel must be bound to a location near its users. Users can
173 // optimize on this information, e.g. generate short branches.
174 class NearLabel : public Label {
175 public:
176 NearLabel() : Label() { _is_near = true; }
177 };
178
179 // A union type for code which has to assemble both constant and
180 // non-constant operands, when the distinction cannot be made
181 // statically.
182 class RegisterOrConstant {
183 private:
184 Register _r;
185 intptr_t _c;
186
187 public:
188 RegisterOrConstant(): _r(noreg), _c(0) {}
189 RegisterOrConstant(Register r): _r(r), _c(0) {}
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