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Merge pull request #2498 from StefanBruens/Fix_opt_lut 

Fix use-after-free in LUT opt pass
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whitequark 2020-12-22 06:15:04 +00:00 committed by GitHub
parent 4949ef1247 9396678db4
commit 2b62b5ef34
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 2 deletions
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6
passes/opt/opt_lut.cc
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@ -277,12 +277,13 @@ struct OptLutWorker
module->connect(lut_output, value);
sigmap.add(lut_output, value);
module->remove(lut);
luts.erase(lut);
luts_arity.erase(lut);
luts_dlogics.erase(lut);
luts_dlogic_inputs.erase(lut);
module->remove(lut);
eliminated_count++;
if (limit > 0)
limit--;
@ -493,11 +494,12 @@ struct OptLutWorker
luts_arity[lutM] = lutM_arity;
luts.erase(lutR);
luts_arity.erase(lutR);
lutR->module->remove(lutR);
worklist.insert(lutM);
worklist.erase(lutR);
lutR->module->remove(lutR);
combined_count++;
if (limit > 0)
limit--;