[PATCH] D34029: Infer lowest bits of an integer Multiply when the low bits of the operands are known

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


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Comment at: lib/Analysis/ValueTracking.cpp:356
+  // and multiplying them together.
+  APInt Bottom0 = Known.One & ~Known.Zero;
+  APInt Bottom1 = Known2.One & ~Known2.Zero;
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Is this And necessary? The Zero bits should be mutex with the One bits here.


https://reviews.llvm.org/D34029