2012-09-22 Thomas König <tkoenig@gcc.gnu.org>

	PR fortran/54599
	* dependency.c (gfc_dep_compare_expr):  Clarify logic,
	remove dead code.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@191640 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 12 insertions, 21 deletions

diff --git a/gcc/fortran/dependency.c b/gcc/fortran/dependency.c
index 165ab4f0abb..7c9525ac805 100644
--- a/gcc/fortran/dependency.c
+++ b/gcc/fortran/dependency.c
@@ -395,30 +395,21 @@ gfc_dep_compare_expr (gfc_expr *e1, gfc_expr *e2)
       l = gfc_dep_compare_expr (e1->value.op.op1, e2->value.op.op1);
       r = gfc_dep_compare_expr (e1->value.op.op2, e2->value.op.op2);
 
-      if (l <= -2)
+      if (l != 0)
 	return l;
 
-      if (l == 0)
-	{
-	  /* Watch out for 'A ' // x vs. 'A' // x.  */
-	  gfc_expr *e1_left = e1->value.op.op1;
-	  gfc_expr *e2_left = e2->value.op.op1;
-
-	  if (e1_left->expr_type == EXPR_CONSTANT
-	      && e2_left->expr_type == EXPR_CONSTANT
-	      && e1_left->value.character.length
-		 != e2_left->value.character.length)
-	    return -2;
-	  else
-	    return r;
-	}
+      /* Left expressions of // compare equal, but
+	 watch out for 'A ' // x vs. 'A' // x.  */
+      gfc_expr *e1_left = e1->value.op.op1;
+      gfc_expr *e2_left = e2->value.op.op1;
+
+      if (e1_left->expr_type == EXPR_CONSTANT
+	  && e2_left->expr_type == EXPR_CONSTANT
+	  && e1_left->value.character.length
+	  != e2_left->value.character.length)
+	return -2;
       else
-	{
-	  if (l != 0)
-	    return l;
-	  else
-	    return r;
-	}
+	return r;
     }
 
   /* Compare X vs. X-C, for INTEGER only.  */