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-rw-r--r--gcc/ChangeLog.graphite6
-rw-r--r--gcc/graphite-sese-to-poly.c3
-rw-r--r--gcc/testsuite/gfortran.dg/graphite/pr42180.f9020
3 files changed, 29 insertions, 0 deletions
diff --git a/gcc/ChangeLog.graphite b/gcc/ChangeLog.graphite
index 9f61066..ae3369e 100644
--- 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
--- 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
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