1 files changed, 61 insertions, 0 deletions
diff --git a/test/CodeGen/emscripten-arguments.c b/test/CodeGen/emscripten-arguments.c
new file mode 100644
index 0000000000..afa0d9c57b
--- /dev/null
+++ b/test/CodeGen/emscripten-arguments.c
@@ -0,0 +1,61 @@
+// RUN: %clang_cc1 -triple asmjs-unknown-emscripten %s -emit-llvm -o - | FileCheck %s
+
+// Basic argument/attribute tests for asmjs/Emscripten
+
+// CHECK: define void @f0(i32 %i, i32 %j, double %k)
+void f0(int i, long j, double k) {}
+
+typedef struct {
+  int aa;
+  int bb;
+} s1;
+// Structs should be passed byval and not split up
+// CHECK: define void @f1(%struct.s1* byval %i)
+void f1(s1 i) {}
+
+typedef struct {
+  int cc;
+} s2;
+// Structs should be returned sret and not simplified by the frontend
+// CHECK: define void @f2(%struct.s2* noalias sret %agg.result)
+s2 f2() {
+  s2 foo;
+  return foo;
+}
+
+// CHECK: define void @f3(i64 %i)
+void f3(long long i) {}
+
+// i8/i16 should be signext, i32 and higher should not
+// CHECK: define void @f4(i8 signext %a, i16 signext %b)
+void f4(char a, short b) {}
+
+// CHECK: define void @f5(i8 zeroext %a, i16 zeroext %b)
+void f5(unsigned char a, unsigned short b) {}
+
+
+enum my_enum {
+  ENUM1,
+  ENUM2,
+  ENUM3,
+};
+// Enums should be treated as the underlying i32
+// CHECK: define void @f6(i32 %a)
+void f6(enum my_enum a) {}
+
+union simple_union {
+  int a;
+  char b;
+};
+// Unions should be passed as byval structs
+// CHECK: define void @f7(%union.simple_union* byval %s)
+void f7(union simple_union s) {}
+
+typedef struct {
+  int b4 : 4;
+  int b3 : 3;
+  int b8 : 8;
+} bitfield1;
+// Bitfields should be passed as byval structs
+// CHECK: define void @f8(%struct.bitfield1* byval %bf1)
+void f8(bitfield1 bf1) {}