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Now use the __debugbreak intrinsic instead of calling RaiseException; it requires no forward declares and still calls VEH.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228745 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Aaron Ballman 2015-02-10 21:13:04 +00:00
parent 363b645818
commit a4109ad7b9
1 changed files with 6 additions and 13 deletions
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19
include/llvm/Support/Compiler.h
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@ -287,19 +287,12 @@
/// which causes the program to exit abnormally. /// which causes the program to exit abnormally.
#if __has_builtin(__builtin_trap) || LLVM_GNUC_PREREQ(4, 3, 0) #if __has_builtin(__builtin_trap) || LLVM_GNUC_PREREQ(4, 3, 0)
# define LLVM_BUILTIN_TRAP __builtin_trap() # define LLVM_BUILTIN_TRAP __builtin_trap()
#elif defined(LLVM_ON_WIN32) #elif defined(_MSC_VER)
#if defined(_WIN64) // The __debugbreak intrinsic is supported by MSVC, does not require forward
extern "C" __declspec(dllimport) void __stdcall RaiseException( // declarations involving platform-specific typedefs (unlike RaiseException),
unsigned long, unsigned long, unsigned long, const unsigned long long *); // results in a call to vectored exception handlers, and encodes to a short
#else // instruction that still causes the trapping behavior we want.
extern "C" __declspec(dllimport) void __stdcall RaiseException( # define LLVM_BUILTIN_TRAP __debugbreak()
unsigned long, unsigned long, unsigned long, const unsigned long *);
#endif
# define LLVM_BUILTIN_TRAP \
do { \
::RaiseException(0x8000DEAD, 0x1 /*EXCEPTION_NONCONTINUABLE*/, 0, nullptr);\
__assume(false); \
} while (0)
#else #else
# define LLVM_BUILTIN_TRAP *(volatile int*)0x11 = 0 # define LLVM_BUILTIN_TRAP *(volatile int*)0x11 = 0
#endif #endif