[PATCH] D38756: [x86] use an insert op to put one variable element into a constant of vectors

Sanjay Patel via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Oct 26 09:08:39 PDT 2017


spatel updated this revision to Diff 120433.
spatel marked 3 inline comments as done.
spatel added a comment.

Patch updated:

1. Pull LLVMContext local variable out, so it can be used later in LowerBUILD_VECTOR().
2. Initialize constant vector with undefs, so we don't have to explicitly set that in the loop.
3. Add TODO comment about reducing the size of the loads.


https://reviews.llvm.org/D38756

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/buildvec-insertvec.ll
  test/CodeGen/X86/insert-into-constant-vector.ll

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