[Patch, committed] PR fortran/101123 - [11/12 Regression] Invalid code for MAX0 with -fdefault-integer-8

[Harald Anlauf via Gcc-patches]

As confirmed in the PR by Jakub, there was a bad conversion of the result
of min0/max0 to the result type.  We should just unconditionally convert
in all cases.

As a benefit, this also fixes pr100283.

Committed after regtesting.

Thanks,
Harald

Fortran - fix conversion to result type for the min/max intrinsic

gcc/fortran/ChangeLog:

        PR fortran/100283
        PR fortran/101123
        * trans-intrinsic.c (gfc_conv_intrinsic_minmax): Unconditionally
        convert result of min/max to result type.

gcc/testsuite/ChangeLog:

        PR fortran/100283
        PR fortran/101123
        * gfortran.dg/min0_max0_1.f90: New test.
        * gfortran.dg/min0_max0_2.f90: New test.


diff --git a/gcc/fortran/trans-intrinsic.c b/gcc/fortran/trans-intrinsic.c
index 73b0bcc9dea..e578449995a 100644
--- a/gcc/fortran/trans-intrinsic.c
+++ b/gcc/fortran/trans-intrinsic.c
@@ -4147,10 +4147,7 @@ gfc_conv_intrinsic_minmax (gfc_se * se, gfc_expr * expr, enum tree_code op)
 			build_empty_stmt (input_location));
       gfc_add_expr_to_block (&se->pre, tmp);
     }
-  if (TREE_CODE (type) == INTEGER_TYPE)
-    se->expr = fold_build1_loc (input_location, FIX_TRUNC_EXPR, type, mvar);
-  else
-    se->expr = convert (type, mvar);
+  se->expr = convert (type, mvar);
 }


diff --git a/gcc/testsuite/gfortran.dg/min0_max0_1.f90 b/gcc/testsuite/gfortran.dg/min0_max0_1.f90
new file mode 100644
index 00000000000..118b0f03b52
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/min0_max0_1.f90
@@ -0,0 +1,9 @@
+! { dg-do compile }
+! { dg-options "-std=gnu" }
+! PR fortran/100283
+
+subroutine s ()
+  integer(kind=8) :: i,j,k
+  i = min0 (j,k)
+  i = max0 (-127_8, min0 (j,127_8))
+end subroutine s
diff --git a/gcc/testsuite/gfortran.dg/min0_max0_2.f90 b/gcc/testsuite/gfortran.dg/min0_max0_2.f90
new file mode 100644
index 00000000000..3fe4fcd3609
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/min0_max0_2.f90
@@ -0,0 +1,10 @@
+! { dg-do compile }
+! { dg-options "-fdefault-integer-8 -std=gnu" }
+! PR fortran/101123
+
+SUBROUTINE TEST
+  IMPLICIT INTEGER*4 (I-N)
+  MAXMN=MAX0(M,N)
+  MINMN=MIN0(M,0_4)
+  MAXRS=MAX1(R,S)
+END SUBROUTINE TEST