llvm-project/llvm/test/CodeGen/X86/isnan.llx

; RUN: llvm-upgrade < %s | llvm-as | llc -march=x86 | not grep call
declare bool %llvm.isunordered.f64(double)

bool %test_isnan(double %X) {
	%R = call bool %llvm.isunordered.f64(double %X, double %X)
	ret bool %R
}