[PATCH] D74165: [x86] [DAGCombine] Prefer shifts of constant widths.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: llvm/include/llvm/CodeGen/TargetLowering.h:3420-3424
+  virtual bool
+  shiftOrRotateIsFasterWithConstantShiftAmount(const SDNode *N,
+                                               CombineLevel Level) const {
+    return false;
+  }
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I think we generally have too many, overly specific queries like this. Is there any real reason to NOT do this on any target?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D74165/new/

https://reviews.llvm.org/D74165