[PATCH] D137138: AMDGPU: Fix DivergenceAnalysis for llvm.read_register

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added inline comments.


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Comment at: llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp:876
+
+  // Go through the inline asm API since I don't see a better way.
+  std::string ConstraintStr = "{" + RegName.str() + "}";
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You could just check the first symbol of the name, it is divergent if it is 'v' or 'a'. Same effect at the end, but much less work.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137138/new/

https://reviews.llvm.org/D137138