[llvm] [NVVM] mark math intrinsics as speculatable, default-attrs (PR #94481)

[Artem Belevich via llvm-commits]

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@@ -691,51 +691,51 @@ let TargetPrefix = "nvvm" in {
 
   def int_nvvm_div_approx_ftz_f : ClangBuiltin<"__nvvm_div_approx_ftz_f">,
       DefaultAttrsIntrinsic<[llvm_float_ty], [llvm_float_ty, llvm_float_ty],
-        [IntrNoMem]>;
+        [IntrNoMem, IntrSpeculatable]>;
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Artem-B wrote:

Do we want to speculate something as expensive as division?
I do not think we have a good way to model costs for the expensive instructions and keeping them non-speculatable is an indirect way to say "those are expensive, only use when you really need to."

https://github.com/llvm/llvm-project/pull/94481