[PATCH] D61840: [SimplifyCFG] ReduceSwitchRange: use the smallest result type possible.

[Shawn Landden via Phabricator via llvm-commits]

shawnl created this revision.
shawnl added a reviewer: jmolloy.
Herald added subscribers: llvm-commits, javed.absar.
Herald added a project: LLVM.

I am trying to move towards much more space-efficient switch statements, using popcnt, as described in PR39013. This is the patch 6 towards that goal, and a continuation of D60673 <https://reviews.llvm.org/D60673>.


Repository:
  rL LLVM

https://reviews.llvm.org/D61840

Files:
  lib/Transforms/Utils/SimplifyCFG.cpp
  test/Transforms/SimplifyCFG/ARM/switch-to-lookup-table.ll
  test/Transforms/SimplifyCFG/X86/switch-covered-bug.ll
  test/Transforms/SimplifyCFG/X86/switch_to_lookup_table.ll
  test/Transforms/SimplifyCFG/rangereduce.ll

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