[PATCH] D123742: llvm-reduce: Inform MRI of used phys reg masks

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: qcolombet, MatzeB, aeubanks, markus, reames.
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arsenm requested review of this revision.
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I'm not sure how to directly observe this invisible cache isn't
updated for a test.


https://reviews.llvm.org/D123742

Files:
  llvm/tools/llvm-reduce/ReducerWorkItem.cpp


Index: llvm/tools/llvm-reduce/ReducerWorkItem.cpp
===================================================================
--- llvm/tools/llvm-reduce/ReducerWorkItem.cpp
+++ llvm/tools/llvm-reduce/ReducerWorkItem.cpp
@@ -35,6 +35,11 @@
     for (auto &SrcMI : SrcMBB) {
       for (unsigned I = 0, E = SrcMI.getNumOperands(); I < E; ++I) {
         auto &DMO = SrcMI.getOperand(I);
+        if (DMO.isRegMask()) {
+          DstMRI->addPhysRegsUsedFromRegMask(DMO.getRegMask());
+          continue;
+        }
+
         if (!DMO.isReg())
           continue;
         Register SrcReg = DMO.getReg();


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