[PATCH] D105587: [Instcombine]Transform reduction+(sext/zext(<n x i1>) to <n x im>) to [-]zext/trunc(ctpop(bitcast <n x i1> to in)) to im.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added inline comments.


================
Comment at: llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp:2020
+            replaceInstUsesWith(CI, Res);
+            return eraseInstFromFunction(CI);
+          }
----------------
nikic wrote:
> Seems to be a recurring pattern in these folds, but why does this call replaceInstUsesWith and eraseInstFromInstruction, rather than doing just `return replaceInstUsesWith()`?
I'm not quite familiar with these interfaces, just copied from other places. Do you suggest replacing it with just `return replaceInstUsesWith(CI, Res);`?


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https://reviews.llvm.org/D105587