Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/c1/c1_LinearScan.cpp
src/share/vm/c1/c1_LinearScan.cpp
- changeset 4860
- 46f6f063b272
- parent 4153
- b9a9ed0f8eeb
- child 5994
- 9acbfe04b5c3
equal
deleted
inserted
replaced
| 4780:98f3af397705 | 4860:46f6f063b272 |
|---|---|
| 6229 LIR_Op* prev_op = instructions->at(instructions->length() - 2); | 6229 LIR_Op* prev_op = instructions->at(instructions->length() - 2); |
| 6230 if (prev_op->code() == lir_branch || prev_op->code() == lir_cond_float_branch) { | 6230 if (prev_op->code() == lir_branch || prev_op->code() == lir_cond_float_branch) { |
| 6231 assert(prev_op->as_OpBranch() != NULL, "branch must be of type LIR_OpBranch"); | 6231 assert(prev_op->as_OpBranch() != NULL, "branch must be of type LIR_OpBranch"); |
| 6232 LIR_OpBranch* prev_branch = (LIR_OpBranch*)prev_op; | 6232 LIR_OpBranch* prev_branch = (LIR_OpBranch*)prev_op; |
| 6233 | 6233 |
| 6234 LIR_Op2* prev_cmp = NULL; | 6234 if (prev_branch->stub() == NULL) { |
| 6235 | 6235 |
| 6236 for(int j = instructions->length() - 3; j >= 0 && prev_cmp == NULL; j--) { | 6236 LIR_Op2* prev_cmp = NULL; |
| 6237 prev_op = instructions->at(j); | 6237 |
| 6238 if(prev_op->code() == lir_cmp) { | 6238 for(int j = instructions->length() - 3; j >= 0 && prev_cmp == NULL; j--) { |
| 6239 assert(prev_op->as_Op2() != NULL, "branch must be of type LIR_Op2"); | 6239 prev_op = instructions->at(j); |
| 6240 prev_cmp = (LIR_Op2*)prev_op; | 6240 if (prev_op->code() == lir_cmp) { |
| 6241 assert(prev_branch->cond() == prev_cmp->condition(), "should be the same"); | 6241 assert(prev_op->as_Op2() != NULL, "branch must be of type LIR_Op2"); |
| 6242 prev_cmp = (LIR_Op2*)prev_op; | |
| 6243 assert(prev_branch->cond() == prev_cmp->condition(), "should be the same"); | |
| 6244 } | |
| 6242 } | 6245 } |
| 6243 } | 6246 assert(prev_cmp != NULL, "should have found comp instruction for branch"); |
| 6244 assert(prev_cmp != NULL, "should have found comp instruction for branch"); | 6247 if (prev_branch->block() == code->at(i + 1) && prev_branch->info() == NULL) { |
| 6245 if (prev_branch->block() == code->at(i + 1) && prev_branch->info() == NULL) { | 6248 |
| 6246 | 6249 TRACE_LINEAR_SCAN(3, tty->print_cr("Negating conditional branch and deleting unconditional branch at end of block B%d", block->block_id())); |
| 6247 TRACE_LINEAR_SCAN(3, tty->print_cr("Negating conditional branch and deleting unconditional branch at end of block B%d", block->block_id())); | 6250 |
| 6248 | 6251 // eliminate a conditional branch to the immediate successor |
| 6249 // eliminate a conditional branch to the immediate successor | 6252 prev_branch->change_block(last_branch->block()); |
| 6250 prev_branch->change_block(last_branch->block()); | 6253 prev_branch->negate_cond(); |
| 6251 prev_branch->negate_cond(); | 6254 prev_cmp->set_condition(prev_branch->cond()); |
| 6252 prev_cmp->set_condition(prev_branch->cond()); | 6255 instructions->truncate(instructions->length() - 1); |
| 6253 instructions->truncate(instructions->length() - 1); | 6256 } |
| 6254 } | 6257 } |
| 6255 } | 6258 } |
| 6256 } | 6259 } |
| 6257 } | 6260 } |
| 6258 } | 6261 } |
