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004e4ff79e
Summary: Introduce a new mode of operation for -print-changed that only reports after a pass changes the IR with all of the other messages suppressed (ie, no initial IR and no messages about ignored, filtered or non-modifying passes). The option processing for -print-changed is changed to take an optional string indicating options for print-changed. Initially, the only option supported is quiet (as described above). This new quiet mode is specified with -print-changed=quiet while -print-changed will continue to function in the same way. It is intended that there will be more options in the future. Author: Jamie Schmeiser <schmeise@ca.ibm.com> Reviewed By: aeubanks (Arthur Eubanks) Differential Revision: https://reviews.llvm.org/D92589