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CrossModuleOptimization: fix a bug in cycle-detection #61311

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Sep 27, 2022
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CrossModuleOptimization: fix a bug in cycle-detection #61311

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4 changes: 4 additions & 0 deletions lib/SILOptimizer/IPO/CrossModuleOptimization.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -185,6 +185,10 @@ bool CrossModuleOptimization::canSerializeFunction(
if (iter != canSerializeFlags.end())
return iter->second;

// Temporarily set the flag to false (to avoid infinite recursion) until we set
// it to true at the end of this function.
canSerializeFlags[function] = false;

if (DeclContext *funcCtxt = function->getDeclContext()) {
if (!canUseFromInline(funcCtxt))
return false;
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