From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 30 Aug 2019 12:02:02 +0000 (+0200)
Subject: backport: re PR tree-optimization/89278 (ICE in gimplify_modify_expr, at gimplify... 
X-Git-Tag: releases/gcc-7.5.0~250
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b84dee85b958bb342a205a23a34c6447df707ad6;p=thirdparty%2Fgcc.git

backport: re PR tree-optimization/89278 (ICE in gimplify_modify_expr, at gimplify.c:5821)

	Backported from mainline
	2019-02-15  Richard Biener  <rguenther@suse.de>
		    Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/89278
	* tree-loop-distribution.c: Include tree-eh.h.
	(generate_memset_builtin, generate_memcpy_builtin): Call
	rewrite_to_non_trapping_overflow on builtin->size before passing it
	to force_gimple_operand_gsi.

	* gcc.dg/pr89278.c: New test.

From-SVN: r275113
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d00c11b5d6b6..4bec5f5c6e64 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,15 @@
 2019-08-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2019-02-15  Richard Biener  <rguenther@suse.de>
+		    Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/89278
+	* tree-loop-distribution.c: Include tree-eh.h.
+	(generate_memset_builtin, generate_memcpy_builtin): Call
+	rewrite_to_non_trapping_overflow on builtin->size before passing it
+	to force_gimple_operand_gsi.
+
 	2019-02-15  Jakub Jelinek  <jakub@redhat.com>
 
 	PR other/89342
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c83e4bfd021c..86a8d1c412f1 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,12 @@
 2019-08-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2019-02-15  Richard Biener  <rguenther@suse.de>
+		    Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/89278
+	* gcc.dg/pr89278.c: New test.
+
 	2019-02-15  Jakub Jelinek  <jakub@redhat.com>
 
 	PR other/89342
diff --git a/gcc/testsuite/gcc.dg/pr89278.c b/gcc/testsuite/gcc.dg/pr89278.c
new file mode 100644
index 000000000000..609cb1a53a99
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr89278.c
@@ -0,0 +1,23 @@
+/* PR tree-optimization/89278 */
+/* { dg-do compile } */
+/* { dg-options "-O1 -ftrapv -ftree-loop-distribute-patterns --param max-loop-header-insns=2" } */
+
+void
+foo (int *w, int x, int y, int z)
+{
+  while (x < y + z)
+    {
+      w[x] = 0;
+      ++x;
+    }
+}
+
+void
+bar (int *__restrict u, int *__restrict w, int x, int y, int z)
+{
+  while (x < y + z)
+    {
+      w[x] = u[x];
+      ++x;
+    }
+}
diff --git a/gcc/tree-loop-distribution.c b/gcc/tree-loop-distribution.c
index 1b9950eca8ee..c8e9db81448b 100644
--- a/gcc/tree-loop-distribution.c
+++ b/gcc/tree-loop-distribution.c
@@ -64,6 +64,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "cfgloop.h"
 #include "tree-scalar-evolution.h"
 #include "tree-vectorizer.h"
+#include "tree-eh.h"
 
 
 /* A Reduced Dependence Graph (RDG) vertex representing a statement.  */
@@ -815,6 +816,7 @@ generate_memset_builtin (struct loop *loop, partition *partition)
 
   nb_bytes = build_size_arg_loc (loc, partition->main_dr, partition->niter,
 				 partition->plus_one);
+  nb_bytes = rewrite_to_non_trapping_overflow (nb_bytes);
   nb_bytes = force_gimple_operand_gsi (&gsi, nb_bytes, true, NULL_TREE,
 				       false, GSI_CONTINUE_LINKING);
   mem = build_addr_arg_loc (loc, partition->main_dr, nb_bytes);
@@ -871,6 +873,7 @@ generate_memcpy_builtin (struct loop *loop, partition *partition)
 
   nb_bytes = build_size_arg_loc (loc, partition->main_dr, partition->niter,
 				 partition->plus_one);
+  nb_bytes = rewrite_to_non_trapping_overflow (nb_bytes);
   nb_bytes = force_gimple_operand_gsi (&gsi, nb_bytes, true, NULL_TREE,
 				       false, GSI_CONTINUE_LINKING);
   dest = build_addr_arg_loc (loc, partition->main_dr, nb_bytes);