[PATCH] D15815: [SLP] Truncate expressions to minimum required bit width

[Matthew Simpson via llvm-commits]

mssimpso updated this revision to Diff 44212.
mssimpso added a comment.

Added back the test case with i32 subtraction.

The test now has a case with i32 subtraction that we vectorize and a case with i64 subtraction that we type-shrink to i32. The cost model currently finds the i64 case to be unprofitable, though I will fix that with a follow-on patch.


http://reviews.llvm.org/D15815

Files:
  lib/Transforms/Vectorize/SLPVectorizer.cpp
  test/Transforms/SLPVectorizer/AArch64/gather-reduce.ll

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