[PATCH] D124552: CodeGenPrepare: Replace constant PHI arguments with switch condition value

[Matthias Braun via Phabricator via llvm-commits]

MatzeB planned changes to this revision.
MatzeB added a comment.

You are right, the trunc one was incorrect. That makes things more complicated for my original testcase. Somehow IR optimizations think it is a good idea to shrink the size of the switch input even if it requires a `trunc`; it certainly makes recovering this pattern in CodeGenPrepare harder.


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  https://reviews.llvm.org/D124552/new/

https://reviews.llvm.org/D124552