arm: Testcase for PR86640

gcc/testsuite/
	PR target/86640
	* gcc.target/arm/pr86640.c: New testcase.

From-SVN: r263114

gcc/testsuite/ChangeLog

+2018-07-31  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	PR target/86640
+	* gcc.target/arm/pr86640.c: New testcase.
+
 2018-07-31  Martin Liska  <mliska@suse.cz>
 
-        PR gcov-profile/85338
-        PR gcov-profile/85350
-        PR gcov-profile/85372
+	PR gcov-profile/85338
+	PR gcov-profile/85350
+	PR gcov-profile/85372
 	* gcc.misc-tests/gcov-pr85338.c: New test.
 	* gcc.misc-tests/gcov-pr85350.c: New test.
 	* gcc.misc-tests/gcov-pr85372.c: New test.
 
 2018-07-31  Martin Liska  <mliska@suse.cz>
 
-        PR gcov-profile/83813
-        PR gcov-profile/84758
-        PR gcov-profile/85217
-        PR gcov-profile/85332
+	PR gcov-profile/83813
+	PR gcov-profile/84758
+	PR gcov-profile/85217
+	PR gcov-profile/85332
 	* gcc.misc-tests/gcov-pr83813.c: New test.
 	* gcc.misc-tests/gcov-pr84758.c: New test.
 	* gcc.misc-tests/gcov-pr85217.c: New test.

gcc/testsuite/gcc.target/arm/pr86640.c

+/* { dg-options "-O3" } */
+
+/* This ICEd with  -O3 -mfpu=neon -mfloat-abi=hard -march=armv7-a  .  */
+
+char fn1() {
+  long long b[5];
+  for (int a = 0; a < 5; a++)
+    b[a] = ~0ULL;
+  return b[3];
+}