[PATCH] D79111: [CostModel][X86][ARM] Teach default implementation of getCastInstrCost to not add a split/join cost if source type and the destination type both have a SplitVector action

[Dave Green via Phabricator via llvm-commits]

dmgreen added inline comments.


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Comment at: llvm/test/Analysis/CostModel/ARM/cast.ll:374
 ; CHECK-MVE-NEXT:  Cost Model: Found an estimated cost of 10 for instruction: %r82 = fptrunc <4 x double> undef to <4 x float>
-; CHECK-MVE-NEXT:  Cost Model: Found an estimated cost of 42 for instruction: %r83 = fptrunc <8 x double> undef to <8 x float>
-; CHECK-MVE-NEXT:  Cost Model: Found an estimated cost of 85 for instruction: %r84 = fptrunc <16 x double> undef to <16 x float>
+; CHECK-MVE-NEXT:  Cost Model: Found an estimated cost of 40 for instruction: %r83 = fptrunc <8 x double> undef to <8 x float>
+; CHECK-MVE-NEXT:  Cost Model: Found an estimated cost of 80 for instruction: %r84 = fptrunc <16 x double> undef to <16 x float>
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These all sound OK.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D79111/new/

https://reviews.llvm.org/D79111