diff options
Diffstat (limited to 'src/settings.js')
| -rw-r--r-- | src/settings.js | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/src/settings.js b/src/settings.js index ef8b3999..ed4fcd05 100644 --- a/src/settings.js +++ b/src/settings.js @@ -3,15 +3,10 @@ QUANTUM_SIZE = 4; // This is the size of an individual field in a structure. 1 w // lead to e.g. doubles and chars both taking 1 memory address. This // is a form of 'compressed' memory, with shrinking and stretching // according to the type, when compared to C/C++. On the other hand - // 8 means all fields take 8 memory addresses, so a double takes - // the same as a char. Note that we only actually store something in - // the top address - the others are just empty, an 'alignment cost' - // of sorts. + // the normal value of 4 means all fields take 4 memory addresses, + // as per the norm on a 32-bit machine. // - // 1 is somewhat faster, but dangerous. - // - // TODO: Cleverly analyze malloc, memset, memcpy etc. operations in - // llvm, and replace with the proper values for us + // 1 is somewhat faster than 4, but dangerous. CORRECT_SIGNS = 1; // Whether we make sure to convert unsigned values to signed values. // Decreases performance with additional runtime checks. Might not be @@ -70,14 +65,14 @@ SAFE_HEAP_LOG = 0; // Log out all SAFE_HEAP operations LABEL_DEBUG = 0; // Print out labels and functions as we enter them EXCEPTION_DEBUG = 1; // Print out exceptions in emscriptened code LIBRARY_DEBUG = 0; // Print out when we enter a library call (library*.js) -DISABLE_EXCEPTIONS = 0; // Disables generating code to actually catch exceptions. If the code you - // are compiling does not actually rely on catching exceptions (but the - // compiler generates code for it, maybe because of stdlibc++ stuff), - // then this can make it much faster. If an exception actually happens, - // it will not be caught and the program will halt (so this will not - // introduce silent failures, which is good). - // TODO: Make this also remove cxa_begin_catch etc., optimize relooper - // for it, etc. (perhaps do all of this as preprocessing on .ll?) +DISABLE_EXCEPTION_CATCHING = 0; // Disables generating code to actually catch exceptions. If the code you + // are compiling does not actually rely on catching exceptions (but the + // compiler generates code for it, maybe because of stdlibc++ stuff), + // then this can make it much faster. If an exception actually happens, + // it will not be caught and the program will halt (so this will not + // introduce silent failures, which is good). + // TODO: Make this also remove cxa_begin_catch etc., optimize relooper + // for it, etc. (perhaps do all of this as preprocessing on .ll?) EXECUTION_TIMEOUT = -1; // Throw an exception after X seconds - useful to debug infinite loops CHECK_OVERFLOWS = 0; // Add code that checks for overflows in integer math operations. // There is currently not much to do to handle overflows if they occur. |