1 files changed, 43 insertions, 0 deletions
diff --git a/clang/test/CodeGen/mips64-padding-arg.c b/clang/test/CodeGen/mips64-padding-arg.c
new file mode 100644
index 0000000..b4dcfba
--- /dev/null
+++ b/clang/test/CodeGen/mips64-padding-arg.c
@@ -0,0 +1,43 @@
+// RUN: %clang -target mips64el-unknown-linux -ccc-clang-archs mips64el -O3 -S -mabi=n64 -o - -emit-llvm %s | FileCheck %s
+
+typedef struct {
+  double d;
+  long double ld;
+} S0;
+
+// Insert padding to ensure arguments of type S0 are aligned to 16-byte boundaries.
+
+// CHECK: define void @foo1(i32 %a0, i64, double %a1.coerce0, i64 %a1.coerce1, i64 %a1.coerce2, i64 %a1.coerce3, double %a2.coerce0, i64 %a2.coerce1, i64 %a2.coerce2, i64 %a2.coerce3, i32 %b, i64, double %a3.coerce0, i64 %a3.coerce1, i64 %a3.coerce2, i64 %a3.coerce3)
+// CHECK: tail call void @foo2(i32 1, i32 2, i32 %a0, i64 undef, double %a1.coerce0, i64 %a1.coerce1, i64 %a1.coerce2, i64 %a1.coerce3, double %a2.coerce0, i64 %a2.coerce1, i64 %a2.coerce2, i64 %a2.coerce3, i32 3, i64 undef, double %a3.coerce0, i64 %a3.coerce1, i64 %a3.coerce2, i64 %a3.coerce3)
+// CHECK: declare void @foo2(i32, i32, i32, i64, double, i64, i64, i64, double, i64, i64, i64, i32, i64, double, i64, i64, i64)
+
+extern void foo2(int, int, int, S0, S0, int, S0);
+
+void foo1(int a0, S0 a1, S0 a2, int b, S0 a3) {
+  foo2(1, 2, a0, a1, a2, 3, a3);
+}
+
+// Insert padding before long double argument.
+//
+// CHECK: define void @foo3(i32 %a0, i64, fp128 %a1)
+// CHECK: tail call void @foo4(i32 1, i32 2, i32 %a0, i64 undef, fp128 %a1)
+// CHECK: declare void @foo4(i32, i32, i32, i64, fp128)
+
+extern void foo4(int, int, int, long double);
+
+void foo3(int a0, long double a1) {
+  foo4(1, 2, a0, a1);
+}
+
+// Insert padding after hidden argument.
+//
+// CHECK: define void @foo5(%struct.S0* noalias sret %agg.result, i64, fp128 %a0)
+// CHECK: call void @foo6(%struct.S0* sret %agg.result, i32 1, i32 2, i64 undef, fp128 %a0)
+// CHECK: declare void @foo6(%struct.S0* sret, i32, i32, i64, fp128)
+
+extern S0 foo6(int, int, long double);
+
+S0 foo5(long double a0) {
+  return foo6(1, 2, a0);
+}
+