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...d %x = call double @llvm.fadd(%a, %b) fpenv(metadata !fpround.tonearest, metadata !fpexcept.strict) ; Constrained fp add with vector predication (https://reviews.llvm.org/D57504) %x = call <256 x double> @llvm.fadd(%a, %b) mask(<256 x i1> %mask), evl(i32 %evl), fpenv(metadata !fpround.tozero, metadata !fpexcept.strict) For constrained fp and VP, we only require a very restricted form of this. That is: - Tuples are only allowed on intrinsic function calls. - There is a builtin list of allowed tuple types (eg tablegen file). - Tuple types are opt in: Intrinsics define a list of permi...