[PATCH] D151719: [RISCV] Add special case for (select cc, 1.0, 0.0) to lowerSELECT

[Liao Chunyu via Phabricator via llvm-commits]

liaolucy updated this revision to Diff 526876.
liaolucy marked 2 inline comments as done.
liaolucy retitled this revision from "[RISCV] Add special case for (select_cc 0, x, setlt, 0.0, 1.0) to lowerSELECT" to "[RISCV] Add special case for (select cc, 1.0, 0.0) to lowerSELECT".
liaolucy edited the summary of this revision.
liaolucy added a comment.

If the select true/false are 1.0 and 0.0 we can replace the select with a sint_to_fp. 
(select cc, 1.0, 0.0) -> (sint_to_fp (zext cc))
https://alive2.llvm.org/ce/z/aoEcd9
thanks


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151719/new/

https://reviews.llvm.org/D151719

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/test/CodeGen/RISCV/double-select-icmp.ll
  llvm/test/CodeGen/RISCV/float-select-icmp.ll
  llvm/test/CodeGen/RISCV/half-select-icmp.ll

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