Subzero. Native 64-bit int arithmetic on x86-64.

crosstest/xdefs.h

+//===- subzero/crosstest/xdefs.h - Definitions for the crosstests. --------===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines the int64 and uint64 types to avoid link-time errors when compiling
+// the crosstests in LP64.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUBZERO_CROSSTEST_XDEFS_H_
+#define SUBZERO_CROSSTEST_XDEFS_H_
+
+typedef unsigned int int32;
+typedef unsigned int uint32;
+typedef long long int64;
+typedef unsigned long long uint64;
+typedef unsigned int SizeT;
+
+#ifdef X8664_STACK_HACK
+
+// the X86_STACK_HACK is an intrusive way of getting the crosstests to run in
+// x86_64 LP64 even with an ILP32 model. This hack allocates a new stack for
+// running the tests in the low 4GB of the address space.
+
+#ifdef __cplusplus
+#define XTEST_EXTERN extern "C"
+#else // !defined(__cplusplus)
+#define XTEST_EXTERN extern
+#endif // __cplusplus
+
+/// xAllocStack allocates the memory chunk [StackEnd - Size - 1, StackEnd). It
+/// requires StackEnd to be less than 32-bits long. Conversely, xDeallocStack
+/// frees that memory chunk.
+/// {@
+XTEST_EXTERN unsigned char *xAllocStack(uint64 StackEnd, uint32 Size);
+XTEST_EXTERN void xDeallocStack(uint64 StackEnd, uint32 Size);
+/// @}
+
+// wrapped_main is invoked by the x86-64 stack hack main. We declare a prototype
+// so the compiler (and not the linker) can yell if a test's wrapped_main
+// prototype does not match what we want.
+XTEST_EXTERN int wrapped_main(int argc, char *argv[]);
+
+#undef XTEST_EXTERN
+
+#endif // X8664_STACK_HACK
+
+#endif // SUBZERO_CROSSTEST_XDEFS_H_