[PATCH] D65261: [PowerPC] Fix ICE when truncating to vector with odd-size elements.

[Chaofan Qiu via Phabricator via llvm-commits]

qiucf created this revision.
qiucf added reviewers: hfinkel, jsji, kbarton, nemanjai, RolandF.
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Herald added subscribers: llvm-commits, shchenz, MaskRay, hiraditya.

In type legalizing on PowerPC platform, when we are going to truncate normal vectors into vectors with elements whose size is not power of 2, the compiler will hit an assert complaining size-mismatch. Since such situation is rare, I add a check to prevent the `trunc` being optimized if the size of element is not power of 2.


Repository:
  rL LLVM

https://reviews.llvm.org/D65261

Files:
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/test/CodeGen/PowerPC/pr25080.ll

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