[PATCH] D151719: [RISCV] Add special case for (select_cc 0, x, setlt, 0.0, 1.0) to lowerSELECT

Craig Topper via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Tue May 30 14:18:57 PDT 2023


craig.topper added inline comments.


================
Comment at: llvm/lib/Target/RISCV/RISCVISelLowering.cpp:5565
 
+  // (select_cc 0, x, setge, 1.0, 0.0)
+  // -> (sint_to_fp (zext (setcc x, 1, setlt)))
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Why does the condition code matter? Isn't this equally valid for any condition code?


Repository:
  rG LLVM Github Monorepo

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

https://reviews.llvm.org/D151719



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