tree 6ee274a1060a5e72dd3387122e901b7709982a0f
parent 8e2fb9b1aee5201926c727efdf5dbe4656415b0b
author Mathias Rav <mathiasr@google.com> 1523887685 +0200
committer Mathias Rav <mathiasr@google.com> 1523887685 +0200

BasicBlock bugfix: Remember to update Phi.definitionUsers

When a phi is written to an unused variable (i.e. value with local info
that ends on the DebugLocalWrite), addDebugLocalEnd() must update both
BasicBlock.currentDefinitions and Phi.definitionUsers.
Without updating Phi.definitionUsers, trivial phi removal will then
neglect to update BasicBlock.currentDefinitions, which causes havoc.

Change-Id: Ia8f29d4809755181344d8d662b25364ffbddf94c