From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 25 Jun 2019 07:00:34 +0000 (+0200)
Subject: re PR sanitizer/90954 (ICE: combining undefined behavior sanitizer with openmp)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=361af3e4194ce1d9620e2c3506115bba9ef18efa;p=gcc.git

re PR sanitizer/90954 (ICE: combining undefined behavior sanitizer with openmp)

	PR sanitizer/90954
	* c-omp.c (c_finish_omp_atomic): Allow tree_invariant_p in addition
	to SAVE_EXPR in first operand of a COMPOUND_EXPR.

	* c-c++-common/gomp/pr90954.c: New test.

From-SVN: r272635
---

diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog
index d093e203ffb..d40073660b8 100644
--- a/gcc/c-family/ChangeLog
+++ b/gcc/c-family/ChangeLog
@@ -1,3 +1,9 @@
+2019-06-25  Jakub Jelinek  <jakub@redhat.com>
+
+	PR sanitizer/90954
+	* c-omp.c (c_finish_omp_atomic): Allow tree_invariant_p in addition
+	to SAVE_EXPR in first operand of a COMPOUND_EXPR.
+
 2019-06-24  Jan Hubicka  <jh@suse.cz>
 
 	* c-common.c (braced_lists_to_strings): Check that
diff --git a/gcc/c-family/c-omp.c b/gcc/c-family/c-omp.c
index 96b2e45ae7a..97206a122d2 100644
--- a/gcc/c-family/c-omp.c
+++ b/gcc/c-family/c-omp.c
@@ -305,7 +305,7 @@ c_finish_omp_atomic (location_t loc, enum tree_code code,
   if (TREE_CODE (x) == COMPOUND_EXPR)
     {
       pre = TREE_OPERAND (x, 0);
-      gcc_assert (TREE_CODE (pre) == SAVE_EXPR);
+      gcc_assert (TREE_CODE (pre) == SAVE_EXPR || tree_invariant_p (pre));
       x = TREE_OPERAND (x, 1);
     }
   gcc_assert (TREE_CODE (x) == MODIFY_EXPR);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b2872082292..ecfca8df524 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-25  Jakub Jelinek  <jakub@redhat.com>
+
+	PR sanitizer/90954
+	* c-c++-common/gomp/pr90954.c: New test.
+
 2019-06-24  Iain Sandoe  <iain@sandoe.co.uk>
 
 	* gcc.target/powerpc/safe-indirect-jump-1.c: Skip for Darwin.
diff --git a/gcc/testsuite/c-c++-common/gomp/pr90954.c b/gcc/testsuite/c-c++-common/gomp/pr90954.c
new file mode 100644
index 00000000000..cc3a6e9e52a
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/gomp/pr90954.c
@@ -0,0 +1,27 @@
+/* PR sanitizer/90954 */
+/* { dg-do compile } */
+/* { dg-options "-fopenmp -fsanitize=undefined" } */
+
+float v;
+int i;
+
+void
+foo (float x, float y)
+{
+  #pragma omp atomic
+  v += x / y;
+}
+
+void
+bar (int x, int y)
+{
+  #pragma omp atomic
+  i += x / y;
+}
+
+void
+baz (int x, int y)
+{
+  #pragma omp atomic
+  i *= (x << y);
+}