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comparison src/share/vm/opto/multnode.cpp @ 12956:3213ba4d3dff

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8024069: replace_in_map() should operate on parent maps Summary: type information gets lost because replace_in_map() doesn't update parent maps Reviewed-by: kvn, twisti
author roland
date Sat, 19 Oct 2013 12:16:43 +0200
parents c9ccd7b85f20
children de6a9e811145
comparison
equal deleted inserted replaced
12955:252d541466ea 12956:3213ba4d3dff
22 * 22 *
23 */ 23 */
24 24
25 #include "precompiled.hpp" 25 #include "precompiled.hpp"
26 #include "opto/callnode.hpp" 26 #include "opto/callnode.hpp"
27 #include "opto/cfgnode.hpp"
27 #include "opto/matcher.hpp" 28 #include "opto/matcher.hpp"
28 #include "opto/mathexactnode.hpp" 29 #include "opto/mathexactnode.hpp"
29 #include "opto/multnode.hpp" 30 #include "opto/multnode.hpp"
30 #include "opto/opcodes.hpp" 31 #include "opto/opcodes.hpp"
31 #include "opto/phaseX.hpp" 32 #include "opto/phaseX.hpp"
148 149
149 //------------------------------ideal_reg-------------------------------------- 150 //------------------------------ideal_reg--------------------------------------
150 uint ProjNode::ideal_reg() const { 151 uint ProjNode::ideal_reg() const {
151 return bottom_type()->ideal_reg(); 152 return bottom_type()->ideal_reg();
152 } 153 }
154
155 //-------------------------------is_uncommon_trap_proj----------------------------
156 // Return true if proj is the form of "proj->[region->..]call_uct"
157 bool ProjNode::is_uncommon_trap_proj(Deoptimization::DeoptReason reason) {
158 int path_limit = 10;
159 Node* out = this;
160 for (int ct = 0; ct < path_limit; ct++) {
161 out = out->unique_ctrl_out();
162 if (out == NULL)
163 return false;
164 if (out->is_CallStaticJava()) {
165 int req = out->as_CallStaticJava()->uncommon_trap_request();
166 if (req != 0) {
167 Deoptimization::DeoptReason trap_reason = Deoptimization::trap_request_reason(req);
168 if (trap_reason == reason || reason == Deoptimization::Reason_none) {
169 return true;
170 }
171 }
172 return false; // don't do further after call
173 }
174 if (out->Opcode() != Op_Region)
175 return false;
176 }
177 return false;
178 }
179
180 //-------------------------------is_uncommon_trap_if_pattern-------------------------
181 // Return true for "if(test)-> proj -> ...
182 // |
183 // V
184 // other_proj->[region->..]call_uct"
185 //
186 // "must_reason_predicate" means the uct reason must be Reason_predicate
187 bool ProjNode::is_uncommon_trap_if_pattern(Deoptimization::DeoptReason reason) {
188 Node *in0 = in(0);
189 if (!in0->is_If()) return false;
190 // Variation of a dead If node.
191 if (in0->outcnt() < 2) return false;
192 IfNode* iff = in0->as_If();
193
194 // we need "If(Conv2B(Opaque1(...)))" pattern for reason_predicate
195 if (reason != Deoptimization::Reason_none) {
196 if (iff->in(1)->Opcode() != Op_Conv2B ||
197 iff->in(1)->in(1)->Opcode() != Op_Opaque1) {
198 return false;
199 }
200 }
201
202 ProjNode* other_proj = iff->proj_out(1-_con)->as_Proj();
203 if (other_proj->is_uncommon_trap_proj(reason)) {
204 assert(reason == Deoptimization::Reason_none ||
205 Compile::current()->is_predicate_opaq(iff->in(1)->in(1)), "should be on the list");
206 return true;
207 }
208 return false;
209 }