options.c (gfc_init_options_struct): assert that the frontend sets…

options.c (gfc_init_options_struct): assert that the frontend sets flag_errno_math and flag_associative_math.

gcc/fortran/ChangeLog:

2014-08-20  Joost VandeVondele  <Joost.VandeVondele@mat.ethz.ch>

	* options.c (gfc_init_options_struct): assert that the frontend sets
        flag_errno_math and flag_associative_math.

gcc/testsuite/ChangeLog:

2014-08-20  Joost VandeVondele  <Joost.VandeVondele@mat.ethz.ch>

	* gfortran.dg/errnocheck_1.f90: New test.
	* gfortran.dg/associative_1.f90: New test.

From-SVN: r214211

gcc/fortran/ChangeLog

+2014-08-20  Joost VandeVondele  <Joost.VandeVondele@mat.ethz.ch>
+
+	* options.c (gfc_init_options_struct): assert that the frontend sets
+	flag_errno_math and flag_associative_math.
+
 2014-08-17  Tobias Burnus  <burnus@net-b.de>
 
 	* resolve.c (gfc_resolve_finalizers): Ensure that parents are

gcc/fortran/options.c

@@ -66,7 +66,9 @@ void
 gfc_init_options_struct (struct gcc_options *opts)
 {
   opts->x_flag_errno_math = 0;
+  opts->frontend_set_flag_errno_math = true;
   opts->x_flag_associative_math = -1;
+  opts->frontend_set_flag_associative_math = true;
 }
 
 /* Get ready for options handling. Keep in sync with

gcc/testsuite/ChangeLog

+2014-08-20  Joost VandeVondele  <Joost.VandeVondele@mat.ethz.ch>
+
+	* gfortran.dg/errnocheck_1.f90: New test.
+	* gfortran.dg/associative_1.f90: New test.
+
 2014-08-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR preprocessor/51303

gcc/testsuite/gfortran.dg/associative_1.f90

+! { dg-do compile }
+! { dg-options "-O1 -fno-signed-zeros -fno-trapping-math -fdump-tree-optimized" }
+! Fortran defaults to associative by default,
+! with -fno-signed-zeros -fno-trapping-math this should optimize away all additions
+SUBROUTINE S1(a)
+ REAL :: a
+ a=1+a-1
+END SUBROUTINE S1
+! { dg-final { scan-tree-dump-times " \\\+ " 0 "optimized" } }
+! { dg-final { cleanup-tree-dump "optimized" } }

gcc/testsuite/gfortran.dg/errnocheck_1.f90

+! { dg-do compile { target x86_64-*-* } }
+! Fortran should default to -fno-math-errno
+! and thus no call to sqrt in asm
+subroutine mysqrt(a)
+ real(KIND=KIND(0.0D0)) :: a
+ a=sqrt(a)
+end subroutine
+! { dg-final { scan-assembler-times "call" 0 } }