Fix __builtin_va_arg assertion failure in ARM AAPCS.

llvm-svn: 166369

1 files changed, 52 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/builtins-va_arg.cpp b/clang/test/SemaCXX/builtins-va_arg.cpp
new file mode 100644
index 00000000000..4f549c8db6f
--- /dev/null
+++ b/clang/test/SemaCXX/builtins-va_arg.cpp
@@ -0,0 +1,52 @@
+// RUN: %clang_cc1 %s -ffreestanding
+// RUN: %clang_cc1 %s -ffreestanding -triple i686-unknown-linux
+// RUN: %clang_cc1 %s -ffreestanding -triple x86_64-unknown-linux
+// RUN: %clang_cc1 %s -ffreestanding -triple mips-unknown-linux
+// RUN: %clang_cc1 %s -ffreestanding -triple mipsel-unknown-linux
+// RUN: %clang_cc1 %s -ffreestanding -triple armv7-unknown-linux-gnueabi
+// RUN: %clang_cc1 %s -ffreestanding -triple thumbv7-unknown-linux-gnueabi
+
+#include "stdarg.h"
+
+int int_accumulator = 0;
+double double_accumulator = 0;
+
+int test_vprintf(const char *fmt, va_list ap) {
+  char ch;
+  int result = 0;
+  while (*fmt != '\0') {
+    ch = *fmt++;
+    if (ch != '%') {
+      continue;
+    }
+
+    ch = *fmt++;
+    switch (ch) {
+    case 'd':
+      int_accumulator += va_arg(ap, int);
+      result++;
+      break;
+
+    case 'f':
+      double_accumulator += va_arg(ap, double);
+      result++;
+      break;
+
+    default:
+      break;
+    }
+
+    if (ch == '0') {
+      break;
+    }
+  }
+  return result;
+}
+
+int test_printf(const char *fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  int result = test_vprintf(fmt, ap);
+  va_end(ap);
+  return result;
+}