Subzero: Align the stack at the point of function calls.

crosstest/test_calling_conv.cpp

Index: crosstest/test_calling_conv.cpp
diff --git a/crosstest/test_calling_conv.cpp b/crosstest/test_calling_conv.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..57bfa6f8f6337ba229528a593274278a26c9e191
--- /dev/null
+++ b/crosstest/test_calling_conv.cpp
@@ -0,0 +1,95 @@
+//===- subzero/crosstest/test_calling_conv.cpp - Implementation for tests -===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the test functions used to check that Subzero
+// generates code compatible with the calling convention used by
+// llc. "Caller" functions test the handling of out-args, and "callee"
+// functions test the handling of in-args.
+//
+//===----------------------------------------------------------------------===//
+
+#include <cstring>
+
+#include "test_calling_conv.h"
+
+#define CALL_AS_TYPE(Ty, Func) (reinterpret_cast<Ty *>(Func))
+
+void caller_i(void) {
+  int arg1 = 0x12345678;
+  CALL_AS_TYPE(callee_i_Ty, Callee)(arg1);
+}
+
+void caller_vvvvv(void) {
+  v4si32 arg1 = {0, 1, 2, 3};
+  v4si32 arg2 = {4, 5, 6, 7};
+  v4si32 arg3 = {8, 9, 10, 11};
+  v4si32 arg4 = {12, 13, 14, 15};
+  v4si32 arg5 = {16, 17, 18, 19};
+
+  CALL_AS_TYPE(callee_vvvvv_Ty, Callee)(arg1, arg2, arg3, arg4, arg5);
+}
+
+void caller_vlvlivfvdviv(void) {
+  v4f32 arg1 = {0, 1, 2, 3};
+  int64_t arg2 = 4;
+  v4f32 arg3 = {6, 7, 8, 9};
+  int64_t arg4 = 10;
+  int arg5 = 11;
+  v4f32 arg6 = {12, 13, 14, 15};
+  float arg7 = 16;
+  v4f32 arg8 = {17, 18, 19, 20};
+  double arg9 = 21;
+  v4f32 arg10 = {22, 23, 24, 25};
+  int arg11 = 26;
+  v4f32 arg12 = {27, 28, 29, 30};
+
+  CALL_AS_TYPE(callee_vlvlivfvdviv_Ty, Callee)(arg1, arg2, arg3, arg4, arg5,
+                                               arg6, arg7, arg8, arg9, arg10,
+                                               arg11, arg12);
+}
+
+#define HANDLE_ARG(ARGNUM)                                                     \
+  case ARGNUM:                                                                 \
+    memcpy(&Buf[0], &arg##ARGNUM, sizeof(arg##ARGNUM));                        \
+    break;
+
+void __attribute__((noinline)) callee_i(int arg1) {
+  switch (ArgNum) { HANDLE_ARG(1); }
+}
+
+void __attribute__((noinline))
+callee_vvvvv(v4si32 arg1, v4si32 arg2, v4si32 arg3, v4si32 arg4, v4si32 arg5) {
+  switch (ArgNum) {
+    HANDLE_ARG(1);
+    HANDLE_ARG(2);
+    HANDLE_ARG(3);
+    HANDLE_ARG(4);
+    HANDLE_ARG(5);
+  }
+}
+
+void __attribute__((noinline))
+callee_vlvlivfvdviv(v4f32 arg1, int64_t arg2, v4f32 arg3, int64_t arg4, int arg5,
+                    v4f32 arg6, float arg7, v4f32 arg8, double arg9, v4f32 arg10,
+                    int arg11, v4f32 arg12) {
+  switch (ArgNum) {
+    HANDLE_ARG(1);
+    HANDLE_ARG(2);
+    HANDLE_ARG(3);
+    HANDLE_ARG(4);
+    HANDLE_ARG(5);
+    HANDLE_ARG(6);
+    HANDLE_ARG(7);
+    HANDLE_ARG(8);
+    HANDLE_ARG(9);
+    HANDLE_ARG(10);
+    HANDLE_ARG(11);
+    HANDLE_ARG(12);
+  }
+}