[PATCH] D143373: [InstCombine] fold icmp of the sum of ext bool based on limited range

[chenglin.bi via Phabricator via llvm-commits]

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For the pattern: (zext i1 X) + (sext i1 Y)), C
 when 
C == -1 means, X == false ,Y == true
C == 0 means , X == Y
C == 1 means, X == true, Y == false
So based on these info we can simplify the icmp to logical operations.

Fix: https://github.com/llvm/llvm-project/issues/59666


https://reviews.llvm.org/D143373

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/test/Transforms/InstCombine/icmp-range.ll

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