[PATCH] D22673: AMDGPU: Track physical registers in SIWholeQuadMode

[Matt Arsenault via llvm-commits]

arsenm added inline comments.

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Comment at: lib/Target/AMDGPU/SIWholeQuadMode.cpp:132
@@ -128,2 +131,3 @@
   void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.addRequired<LiveIntervals>();
     AU.setPreservesCFG();
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Should this also preserve it? Recomputing it if not used is quite expensive. I've also seen crashes when not preserving it (although I'm not 100% sure if that counts as a bug somewhere else)


https://reviews.llvm.org/D22673