PR fortran/33288

	* arith.c (reduce_unary, reduce_binary_ac, reduce_binary_ca,
	reduce_binary_aa): Call ourselves recursively if an element of
	the constructor is itself a constant array.

	* gfortran.dg/array_constructor_19.f90: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@128632 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 47 insertions, 4 deletions

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 9e7ca3a389e..f3a65cd086b 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,10 @@
+2007-09-20  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+
+	PR fortran/33288
+	* arith.c (reduce_unary, reduce_binary_ac, reduce_binary_ca,
+	reduce_binary_aa): Call ourselves recursively if an element of
+	the constructor is itself a constant array.
+
 2007-09-20  Tobias Schlüter  <tobi@gcc.gnu.org>
 
 	* io.c (resolve_tag_format): New function using code split out
diff --git a/gcc/fortran/arith.c b/gcc/fortran/arith.c
index f95f5e7f763..149f93f08e1 100644
--- a/gcc/fortran/arith.c
+++ b/gcc/fortran/arith.c
@@ -1288,7 +1288,8 @@ reduce_unary (arith (*eval) (gfc_expr *, gfc_expr **), gfc_expr *op,
 
   for (c = head; c; c = c->next)
     {
-      rc = eval (c->expr, &r);
+      rc = reduce_unary (eval, c->expr, &r);
+
       if (rc != ARITH_OK)
 	break;
 
@@ -1328,7 +1329,11 @@ reduce_binary_ac (arith (*eval) (gfc_expr *, gfc_expr *, gfc_expr **),
 
   for (c = head; c; c = c->next)
     {
-      rc = eval (c->expr, op2, &r);
+      if (c->expr->expr_type == EXPR_CONSTANT)
+        rc = eval (c->expr, op2, &r);
+      else
+	rc = reduce_binary_ac (eval, c->expr, op2, &r);
+
       if (rc != ARITH_OK)
 	break;
 
@@ -1368,7 +1373,11 @@ reduce_binary_ca (arith (*eval) (gfc_expr *, gfc_expr *, gfc_expr **),
 
   for (c = head; c; c = c->next)
     {
-      rc = eval (op1, c->expr, &r);
+      if (c->expr->expr_type == EXPR_CONSTANT)
+	rc = eval (op1, c->expr, &r);
+      else
+	rc = reduce_binary_ca (eval, op1, c->expr, &r);
+
       if (rc != ARITH_OK)
 	break;
 
@@ -1395,6 +1404,11 @@ reduce_binary_ca (arith (*eval) (gfc_expr *, gfc_expr *, gfc_expr **),
 }
 
 
+/* We need a forward declaration of reduce_binary.  */
+static arith reduce_binary (arith (*eval) (gfc_expr *, gfc_expr *, gfc_expr **),
+			    gfc_expr *op1, gfc_expr *op2, gfc_expr **result);
+
+
 static arith
 reduce_binary_aa (arith (*eval) (gfc_expr *, gfc_expr *, gfc_expr **),
 		  gfc_expr *op1, gfc_expr *op2, gfc_expr **result)
@@ -1421,7 +1435,7 @@ reduce_binary_aa (arith (*eval) (gfc_expr *, gfc_expr *, gfc_expr **),
 	      break;
 	    }
 
-	  rc = eval (c->expr, d->expr, &r);
+	  rc = reduce_binary (eval, c->expr, d->expr, &r);
 	  if (rc != ARITH_OK)
 	    break;
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9974bc3a0ec..ee10c4cfdcc 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2007-09-20  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
+
+	PR fortran/33288
+	* gfortran.dg/array_constructor_19.f90: New test.
+
 2007-09-20  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/33316
diff --git a/gcc/testsuite/gfortran.dg/array_constructor_19.f90 b/gcc/testsuite/gfortran.dg/array_constructor_19.f90
new file mode 100644
index 00000000000..460a34f5c1b
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/array_constructor_19.f90
@@ -0,0 +1,17 @@
+! Simplification of unary and binary expressions containing
+! array constructors.
+!
+! See PR33288
+!
+! { dg-do run }
+  real, parameter :: x(1) = 42
+  real, parameter :: x1(1) = (/ x /) + 1
+  real, parameter :: x2(1) = 1 + (/ x /)
+  real, parameter :: x3(1) = -(/ x /)
+  real, parameter :: x4(2) = (/ x, 1. /) + (/ 2, (/3/) /)
+
+  if (any (x1 /= (/43./))) call abort
+  if (any (x2 /= (/43./))) call abort
+  if (any (x3 /= (/-42./))) call abort
+  if (any (x4 /= (/44., 4./))) call abort
+end