Call to GetSwitchDescMap() that creates m_switchDescMap if it is nullptr. m_switchDescMap is invalidated everytime we renumber blocks or we replace jump targets. However, if I trace the caller of GetSwitchDescMap(), I see that it can get called from DEBUG via fgDebugCheckProfileWeights() and repopulate the map, which will behave differently at later point of time when we UpdateSwitchTableTarget().
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if (m_switchDescMap == nullptr) |
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{ |
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return; // No mappings, nothing to do. |
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} |
In Debug, map != nullptr and hence we update the target, but in Release, it is still nullptr. In Debug, since we updated the target, it changes the successors we visit and variables created, offsets they get assigned to, etc.
Mostly caused by #98526
Call to
GetSwitchDescMap()that createsm_switchDescMapif it is nullptr.m_switchDescMapis invalidated everytime we renumber blocks or we replace jump targets. However, if I trace the caller ofGetSwitchDescMap(), I see that it can get called from DEBUG viafgDebugCheckProfileWeights()and repopulate the map, which will behave differently at later point of time when weUpdateSwitchTableTarget().runtime/src/coreclr/jit/fgflow.cpp
Lines 627 to 630 in 703f6e8
In Debug,
map != nullptrand hence we update the target, but in Release, it is still nullptr. In Debug, since we updated the target, it changes the successors we visit and variables created, offsets they get assigned to, etc.Mostly caused by #98526