If errno doesn't matter (e.g. in -ffast-math scenarios), sqrt* should be

compiled to llvm.sqrt.

llvm-svn: 22488

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

@@ -0,0 +1,7 @@
+// 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);
+}