test/CFrontend/2005-07-20-SqrtNoErrno.c

// RUN: %llvmgcc %s -S -o - -fno-math-errno | gccas | llvm-dis | grep llvm.sqrt
#include <math.h>

float foo(float X) {
  // Check that this compiles to llvm.sqrt when errno is ignored.
  return sqrtf(X);
}