1 files changed, 26 insertions, 0 deletions
diff --git a/clang/test/Sema/builtins-arm-exclusive-124.c b/clang/test/Sema/builtins-arm-exclusive-124.c
new file mode 100644
index 0000000..013ae3f
--- /dev/null
+++ b/clang/test/Sema/builtins-arm-exclusive-124.c
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -triple armv7m -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple armv8m.main -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple armv8.1m.main -fsyntax-only -verify %s
+
+// All these architecture versions provide 1-, 2- or 4-byte exclusive accesses,
+// but don't have the LDREXD instruction which takes two operand registers and
+// performs an 8-byte exclusive access. So the calls with a pointer to long
+// long are rejected.
+
+int test_ldrex(char *addr) {
+  int sum = 0;
+  sum += __builtin_arm_ldrex(addr);
+  sum += __builtin_arm_ldrex((short *)addr);
+  sum += __builtin_arm_ldrex((int *)addr);
+  sum += __builtin_arm_ldrex((long long *)addr); // expected-error {{address argument to load or store exclusive builtin must be a pointer to 1,2 or 4 byte type}}
+  return sum;
+}
+
+int test_strex(char *addr) {
+  int res = 0;
+  res |= __builtin_arm_strex(4, addr);
+  res |= __builtin_arm_strex(42, (short *)addr);
+  res |= __builtin_arm_strex(42, (int *)addr);
+  res |= __builtin_arm_strex(42, (long long *)addr); // expected-error {{address argument to load or store exclusive builtin must be a pointer to 1,2 or 4 byte type}}
+  return res;
+}