#include "llvm/Support/Compiler.h"

Classes
struct	llvm::ScopedFatalErrorHandler
	ScopedFatalErrorHandler - This is a simple helper class which just calls install_fatal_error_handler in its constructor and remove_fatal_error_handler in its destructor. More...

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.

Macros
#define	llvm_unreachable(msg)
	Marks that the current location is not supposed to be reachable.

Typedefs
typedef void(*	llvm::fatal_error_handler_t) (void user_data, const char reason, bool gen_crash_diag)
	An error handler callback.

Functions
LLVM_ABI void	llvm::install_fatal_error_handler (fatal_error_handler_t handler, void *user_data=nullptr)
	install_fatal_error_handler - Installs a new error handler to be used whenever a serious (non-recoverable) error is encountered by LLVM.
LLVM_ABI void	llvm::remove_fatal_error_handler ()
	Restores default error handling behaviour.
LLVM_ABI void	llvm::report_fatal_error (const char *reason, bool gen_crash_diag=true)
LLVM_ABI void	llvm::report_fatal_error (StringRef reason, bool gen_crash_diag=true)
LLVM_ABI void	llvm::report_fatal_error (const Twine &reason, bool gen_crash_diag=true)
LLVM_ABI void	llvm::reportFatalInternalError (const char *reason)
	Report a fatal error that likely indicates a bug in LLVM.
LLVM_ABI void	llvm::reportFatalInternalError (StringRef reason)
LLVM_ABI void	llvm::reportFatalInternalError (const Twine &reason)
LLVM_ABI void	llvm::reportFatalUsageError (const char *reason)
	Report a fatal error that does not indicate a bug in LLVM.
LLVM_ABI void	llvm::reportFatalUsageError (StringRef reason)
LLVM_ABI void	llvm::reportFatalUsageError (const Twine &reason)
LLVM_ABI void	llvm::install_bad_alloc_error_handler (fatal_error_handler_t handler, void *user_data=nullptr)
	Installs a new bad alloc error handler that should be used whenever a bad alloc error, e.g.
LLVM_ABI void	llvm::remove_bad_alloc_error_handler ()
	Restores default bad alloc error handling behavior.
LLVM_ABI void	llvm::install_out_of_memory_new_handler ()
LLVM_ABI void	llvm::report_bad_alloc_error (const char *Reason, bool GenCrashDiag=true)
	Reports a bad alloc error, calling any user defined bad alloc error handler.
LLVM_ABI void	llvm::llvm_unreachable_internal (const char msg=nullptr, const char file=nullptr, unsigned line=0)
	This function calls abort(), and prints the optional message to stderr.

Macro Definition Documentation

◆ llvm_unreachable

#define llvm_unreachable ( msg )

Value:

::llvm::llvm_unreachable_internal(msg, __FILE__, __LINE__)

llvm::llvm_unreachable_internal

LLVM_ABI void llvm_unreachable_internal(const char *msg=nullptr, const char *file=nullptr, unsigned line=0)

This function calls abort(), and prints the optional message to stderr.

Definition ErrorHandling.cpp:233

Marks that the current location is not supposed to be reachable.

In !NDEBUG builds, prints the message and location info to stderr. In NDEBUG builds, if the platform does not support a builtin unreachable then we call an internal LLVM runtime function. Otherwise the behavior is controlled by the CMake flag -DLLVM_UNREACHABLE_OPTIMIZE

When "ON" (default) llvm_unreachable() becomes an optimizer hint that the current location is not supposed to be reachable: the hint turns such code path into undefined behavior. On compilers that don't support such hints, prints a reduced message instead and aborts the program.
When "OFF", a builtin_trap is emitted instead of an Use this instead of assert(0). It conveys intent more clearly, suppresses diagnostics for unreachable code paths, and allows compilers to omit unnecessary code.

Definition at line 164 of file ErrorHandling.h.

Classes

Namespaces

Macros

Typedefs

Functions

Macro Definition Documentation

◆ llvm_unreachable