From: Tom de Vries <tom@codesourcery.com>
Date: Sat, 7 May 2016 06:47:07 +0000 (+0000)
Subject: Handle NULL def in build_cross_bb_scalars_def
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5ec4a8cd76196b82dfa1b6e16b6646e6342c969f;p=gcc.git

Handle NULL def in build_cross_bb_scalars_def

2016-05-07  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/70956
	* graphite-scop-detection.c (build_cross_bb_scalars_def): Handle NULL
	def.

	* gcc.dg/graphite/pr70956.c: New test.

From-SVN: r235994
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ce10e79d4e5..5f4d7fd3f2c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-05-07  Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/70956
+	* graphite-scop-detection.c (build_cross_bb_scalars_def): Handle NULL
+	def.
+
 2016-05-07  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	* config/sh/sh-protos.h (sh_cbranch_distance): Declare new function.
diff --git a/gcc/graphite-scop-detection.c b/gcc/graphite-scop-detection.c
index 7615842b332..dd50a1e4ec0 100644
--- a/gcc/graphite-scop-detection.c
+++ b/gcc/graphite-scop-detection.c
@@ -1722,8 +1722,7 @@ static void
 build_cross_bb_scalars_def (scop_p scop, tree def, basic_block def_bb,
 			     vec<tree> *writes)
 {
-  gcc_assert (def);
-  if (!is_gimple_reg (def))
+  if (!def || !is_gimple_reg (def))
     return;
 
   /* Do not gather scalar variables that can be analyzed by SCEV as they can be
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 31a65a410e3..585839c0c75 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-05-07  Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/70956
+	* gcc.dg/graphite/pr70956.c: New test.
+
 2016-05-06  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/70941
diff --git a/gcc/testsuite/gcc.dg/graphite/pr70956.c b/gcc/testsuite/gcc.dg/graphite/pr70956.c
new file mode 100644
index 00000000000..31fc25f4638
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/graphite/pr70956.c
@@ -0,0 +1,4 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fgraphite-identity" } */
+
+#include "../tree-ssa/vrp66.c"