Fix PR42180.

2009-12-18  Sebastian Pop  <sebastian.pop@amd.com>

	PR middle-end/42180
	* graphite-sese-to-poly.c (split_reduction_stmt): Do not split blocks
	that contain only one statement.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@155422 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog.graphite b/gcc/ChangeLog.graphite
index 9f61066..ae3369e 100644 (file)
--- a/gcc/ChangeLog.graphite
+++ b/gcc/ChangeLog.graphite
@@ -1,3 +1,9 @@
+2009-12-18  Sebastian Pop  <sebastian.pop@amd.com>
+
+       PR middle-end/42180
+       * graphite-sese-to-poly.c (split_reduction_stmt): Do not split blocks
+       that contain only one statement.
+
 2009-12-17  Sebastian Pop  <sebastian.pop@amd.com>
 
        PR middle-end/42393

diff --git a/gcc/graphite-sese-to-poly.c b/gcc/graphite-sese-to-poly.c
index 7b61ed7..5999a65 100644 (file)
--- a/gcc/graphite-sese-to-poly.c
+++ b/gcc/graphite-sese-to-poly.c
@@ -2450,6 +2450,9 @@ split_reduction_stmt (gimple stmt)
 
   split_block (bb, stmt);
 
+  if (gsi_one_before_end_p (gsi_start_bb (bb)))
+    return bb;
+
   gsi = gsi_last_bb (bb);
   gsi_prev (&gsi);
   e = split_block (bb, gsi_stmt (gsi));

diff --git a/gcc/testsuite/gfortran.dg/graphite/pr42180.f90 b/gcc/testsuite/gfortran.dg/graphite/pr42180.f90
new file mode 100644 (file)
index 0000000..6c8daea
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/graphite/pr42180.f90
@@ -0,0 +1,20 @@
+module mcc_m
+  integer, parameter, private :: longreal = selected_real_kind(15,90)
+contains
+  subroutine mutual_ind_cir_cir_coils (m, l12)
+    real (kind = longreal), intent(out) :: l12
+    real (kind = longreal), dimension(1:9), save :: zw
+    gauss:do i = 1, 9
+       theta_l12 = 0.0_longreal
+       theta1:   do n1 = 1, 2*m
+          theta_1 = pi*real(n1,longreal)/real(m,longreal)
+          theta2:       do n2 = 1, 2*m
+             numerator = -sin(theta_1)*tvx + cos(theta_1)*tvy
+             theta_l12 = theta_l12 + numerator/denominator
+          end do theta2
+       end do theta1
+       l12 = l12 + zw(i)*theta_l12
+    end do gauss
+    l12 = coefficient * l12
+  end subroutine mutual_ind_cir_cir_coils
+end module mcc_m