[llvm] [NVPTX] Add patterns for fma.relu.{f16|f16x2|bf16|bf16x2} (PR #114977)

[Fraser Cormack via llvm-commits]

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@@ -3917,3 +3903,52 @@ def atomic_thread_fence_seq_cst_cta :
 def atomic_thread_fence_acq_rel_cta :
   NVPTXInst<(outs), (ins), "fence.acq_rel.cta;", []>,
   Requires<[hasPTX<60>, hasSM<70>]>;
+
+def fpimm_any_zero : FPImmLeaf<fAny, [{
+  return Imm.isExactlyValue(+0.0) | Imm.isExactlyValue(-0.0);
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frasercrmck wrote:

This might give a warning about bitwise orbeing used instead of logical or. I'd suggest using `||`.

Alternatively, perhaps `Imm.isExactlyValue(+0.0) | Imm.isExactlyValue(-0.0)` is just `Imm.isZero()`?

https://github.com/llvm/llvm-project/pull/114977