[PATCH] Fix type mismatch in perfect_nestify (PR tree-optimization/39516)

[Jakub Jelinek]

Hi!

GCC ICEs on the attached testcase, because perfect_nestify creates
the uboundvar.* variable with incorrect type (always int).

Fixed thusly, bootstrapped/regtested on x86_64-linux, ok for trunk?

2009-03-23  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/39516
	* lambda-code.c (perfect_nestify): Fix type of the uboundvar variable.

	* gfortran.dg/pr39516.f: New test.

--- gcc/lambda-code.c.jj	2009-01-13 18:32:17.000000000 +0100
+++ gcc/lambda-code.c	2009-03-23 10:20:52.000000000 +0100
@@ -2472,7 +2472,8 @@ perfect_nestify (struct loop *loop,
      it to one just in case.  */
 
   exit_condition = get_loop_exit_condition (newloop);
-  uboundvar = create_tmp_var (integer_type_node, "uboundvar");
+  uboundvar = create_tmp_var (TREE_TYPE (VEC_index (tree, ubounds, 0)),
+			      "uboundvar");
   add_referenced_var (uboundvar);
   stmt = gimple_build_assign (uboundvar, VEC_index (tree, ubounds, 0));
   uboundvar = make_ssa_name (uboundvar, stmt);
--- gcc/testsuite/gfortran.dg/pr39516.f.jj	2009-03-23 10:24:53.000000000 +0100
+++ gcc/testsuite/gfortran.dg/pr39516.f	2009-03-23 09:47:58.000000000 +0100
@@ -0,0 +1,19 @@
+C PR tree-optimization/39516
+C { dg-options "-O2 -ftree-loop-linear" }
+      SUBROUTINE SUB(A, B, M)
+      IMPLICIT NONE
+      DOUBLE PRECISION A(20,20), B(20)
+      INTEGER*8 I, J, K, M
+      DO I=1,M
+        DO J=1,M
+          A(I,J)=A(I,J)+1
+        END DO
+      END DO
+      DO K=1,20
+        DO I=1,M
+          DO J=1,M
+            B(I)=B(I)+A(I,J)
+          END DO
+        END DO
+      END DO
+      END SUBROUTINE

	Jakub