[llvm] [llvm][RISCV] Support Zvfbfa codegen for fneg, fabs and copysign (PR #166944)

[Craig Topper via llvm-commits]

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@@ -7245,7 +7315,13 @@ static bool isPromotedOpNeedingSplit(SDValue Op,
   return (Op.getValueType() == MVT::nxv32f16 &&
           (Subtarget.hasVInstructionsF16Minimal() &&
            !Subtarget.hasVInstructionsF16())) ||
-         Op.getValueType() == MVT::nxv32bf16;
+         (Op.getValueType() == MVT::nxv32bf16 &&
+          Subtarget.hasVInstructionsBF16Minimal() &&
+          (!Subtarget.hasVInstructionsBF16() ||
+           (std::find(std::begin(ZvfbfaOps), std::end(ZvfbfaOps),
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topperc wrote:

`llvm::contains`

https://github.com/llvm/llvm-project/pull/166944