Fortran: prevent redundant integer division truncation warnings [PR108592]

gcc/fortran/ChangeLog:

	PR fortran/108592
	* arith.cc (gfc_arith_divide): Emit integer division truncation
	warnings using gfc_warning instead of gfc_warning_now to prevent
	redundant messages.

gcc/testsuite/ChangeLog:

	PR fortran/108592
	* gfortran.dg/pr108592.f90: New test.

diff --git a/gcc/fortran/arith.cc b/gcc/fortran/arith.cc
index 6de6d21c73d69fa5f701c4ab313488e2811b434e..d0d1c0b03d225f3914cb75af07d676e6cd354d09 100644 (file)
--- a/gcc/fortran/arith.cc
+++ b/gcc/fortran/arith.cc
@@ -778,7 +778,7 @@ gfc_arith_divide (gfc_expr *op1, gfc_expr *op2, gfc_expr **resultp)
            {
              char *p;
              p = mpz_get_str (NULL, 10, result->value.integer);
-             gfc_warning_now (OPT_Winteger_division, "Integer division "
+             gfc_warning (OPT_Winteger_division, "Integer division "
                               "truncated to constant %qs at %L", p,
                               &op1->where);
              free (p);

diff --git a/gcc/testsuite/gfortran.dg/pr108592.f90 b/gcc/testsuite/gfortran.dg/pr108592.f90
new file mode 100644 (file)
index 0000000..224b1d8
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr108592.f90
@@ -0,0 +1,8 @@
+! { dg-do compile }
+! { dg-options "-Winteger-division" }
+! PR fortran/108592 - warn only once for truncation of integer division
+
+program foo
+  if (8 < (20/9)) stop 1 ! { dg-bogus "Integer division.*Integer division" }
+! { dg-message "Integer division truncated" "" { target *-*-* } .-1 }
+end program