Correct the code generation for function arguments of vec3 types on x86_64 when they are greater than 128 bits. This was incorrectly coercing things like long3 into a double2.

Add test case.

llvm-svn: 145312

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/test/CodeGen/x86_64-arguments.c b/clang/test/CodeGen/x86_64-arguments.c
index ea7dd79c790..0536bf77026 100644
--- a/clang/test/CodeGen/x86_64-arguments.c
+++ b/clang/test/CodeGen/x86_64-arguments.c
@@ -318,3 +318,11 @@ int f44(int i, ...) {
   __builtin_va_end(ap);
   return s.y;
 }
+
+// Text that vec3 returns the correct LLVM IR type.
+// CHECK: define i32 @foo(<3 x i64> %X)
+typedef long long3 __attribute((ext_vector_type(3)));
+int foo(long3 X)
+{
+  return 0;
+}