Sven van Haastregt bfc961aeb2 [TargetLowering] Check boolean content when folding bit compare ...

Updates an optimization that relies on boolean contents being either 0
or 1 to properly check for this before triggering.

The following:
  (X & 8) != 0 --> (X & 8) >> 3
Produces unexpected results when a boolean 'true' value is represented
by negative one.

Patch by Erik Hogeman.

Differential Revision: https://reviews.llvm.org/D89390

2020-10-21 11:46:55 +01:00

314 KiB

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