It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/m4/func_isinf.m4 b/autoconf/m4/func_isinf.m4
new file mode 100644
index 0000000..c936bf9
--- /dev/null
+++ b/autoconf/m4/func_isinf.m4
@@ -0,0 +1,36 @@
+#
+# This function determins if the the isinf function isavailable on this
+# platform.
+#
+AC_DEFUN([AC_FUNC_ISINF],[
+AC_SINGLE_CXX_CHECK([ac_cv_func_isinf_in_math_h],
+ [isinf], [<math.h>],
+ [float f; isinf(f);])
+if test "$ac_cv_func_isinf_in_math_h" = "yes" ; then
+ AC_DEFINE([HAVE_ISINF_IN_MATH_H],1,[Set to 1 if the isinf function is found in <math.h>])
+fi
+
+AC_SINGLE_CXX_CHECK([ac_cv_func_isinf_in_cmath],
+ [isinf], [<cmath>],
+ [float f; isinf(f);])
+if test "$ac_cv_func_isinf_in_cmath" = "yes" ; then
+ AC_DEFINE([HAVE_ISINF_IN_CMATH],1,[Set to 1 if the isinf function is found in <cmath>])
+fi
+
+AC_SINGLE_CXX_CHECK([ac_cv_func_std_isinf_in_cmath],
+ [std::isinf], [<cmath>],
+ [float f; std::isinf(f)}])
+if test "$ac_cv_func_std_isinf_in_cmath" = "yes" ; then
+ AC_DEFINE([HAVE_STD_ISINF_IN_CMATH],1,[Set to 1 if the std::isinf function is found in <cmath>])
+fi
+
+AC_SINGLE_CXX_CHECK([ac_cv_func_finite_in_ieeefp_h],
+ [finite], [<ieeefp.h>],
+ [float f; finite(f);])
+if test "$ac_cv_func_finite_in_ieeefp_h" = "yes" ; then
+ AC_DEFINE([HAVE_FINITE_IN_IEEEFP_H],1,[Set to 1 if the finite function is found in <ieeefp.h>])
+fi
+
+])
+
+