[PATCH] D100604: [PowerPC] Improve codegen for int-to-fp conversion of subword vector extract

[Albion Fung via Phabricator via llvm-commits]

Conanap created this revision.
Conanap added reviewers: nemanjai, saghir, PowerPC.
Conanap added projects: LLVM, PowerPC, clang.
Herald added a subscriber: kbarton.
Conanap requested review of this revision.

The following example generates code that can be completed in two instructions instead:

  void testutof(vector unsigned short a, float *ptr) {
    *ptr = a[0];
  }

The patch improves this code gen.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D100604

Files:
  llvm/lib/Target/PowerPC/PPCInstrVSX.td
  llvm/test/CodeGen/PowerPC/uint-to-fp-v4i32.ll
  llvm/test/CodeGen/PowerPC/vec_conv_i16_to_fp32_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_i8_to_fp32_elts.ll

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