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

crosstest/test_calling_conv.h

+//===- subzero/crosstest/test_calling_conv.h - Test prototypes --*- C++ -*-===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the function prototypes for crosstesting the calling
+// convention.
+//
+//===----------------------------------------------------------------------===//
+
+#include "test_calling_conv.def"
+#include "vectors.h"
+
+typedef void (*CalleePtrTy)();
+extern CalleePtrTy Callee;
+extern size_t ArgNum;
+extern char *Buf;
+
+void caller_i();
+void caller_alloca_i();
+typedef void callee_i_Ty(int);
+callee_i_Ty callee_i;
+callee_i_Ty callee_alloca_i;
+
+void caller_vvvvv();
+typedef void (callee_vvvvv_Ty)(v4si32, v4si32, v4si32, v4si32, v4si32);
+callee_vvvvv_Ty callee_vvvvv;
+
+void caller_vlvlivfvdviv();
+typedef void(callee_vlvlivfvdviv_Ty)(v4f32, int64_t, v4f32, int64_t, int, v4f32,
+                                    float, v4f32, double, v4f32, int, v4f32);
+callee_vlvlivfvdviv_Ty callee_vlvlivfvdviv;