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comparison src/share/vm/adlc/formssel.cpp @ 3851:95134e034042

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7063629: use cbcond in C2 generated code on T4 Summary: Use new short branch instruction in C2 generated code. Reviewed-by: never
author kvn
date Thu, 11 Aug 2011 12:08:11 -0700
parents f1c12354c3f7
children 11211f7cb5a0
comparison
equal deleted inserted replaced
3850:6987871cfb9b 3851:95134e034042
1179 !is_short_branch() && // Don't match another short branch variant 1179 !is_short_branch() && // Don't match another short branch variant
1180 reduce_result() != NULL && 1180 reduce_result() != NULL &&
1181 strcmp(reduce_result(), short_branch->reduce_result()) == 0 && 1181 strcmp(reduce_result(), short_branch->reduce_result()) == 0 &&
1182 _matrule->equivalent(AD.globalNames(), short_branch->_matrule)) { 1182 _matrule->equivalent(AD.globalNames(), short_branch->_matrule)) {
1183 // The instructions are equivalent. 1183 // The instructions are equivalent.
1184
1185 // Now verify that both instructions have the same parameters and
1186 // the same effects. Both branch forms should have the same inputs
1187 // and resulting projections to correctly replace a long branch node
1188 // with corresponding short branch node during code generation.
1189
1190 bool different = false;
1191 if (short_branch->_components.count() != _components.count()) {
1192 different = true;
1193 } else if (_components.count() > 0) {
1194 short_branch->_components.reset();
1195 _components.reset();
1196 Component *comp;
1197 while ((comp = _components.iter()) != NULL) {
1198 Component *short_comp = short_branch->_components.iter();
1199 if (short_comp == NULL ||
1200 short_comp->_type != comp->_type ||
1201 short_comp->_usedef != comp->_usedef) {
1202 different = true;
1203 break;
1204 }
1205 }
1206 if (short_branch->_components.iter() != NULL)
1207 different = true;
1208 }
1209 if (different) {
1210 globalAD->syntax_err(short_branch->_linenum, "Instruction %s and its short form %s have different parameters\n", _ident, short_branch->_ident);
1211 }
1184 if (AD._short_branch_debug) { 1212 if (AD._short_branch_debug) {
1185 fprintf(stderr, "Instruction %s has short form %s\n", _ident, short_branch->_ident); 1213 fprintf(stderr, "Instruction %s has short form %s\n", _ident, short_branch->_ident);
1186 } 1214 }
1187 _short_branch_form = short_branch; 1215 _short_branch_form = short_branch;
1188 return true; 1216 return true;