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Disable optimizations on windows for parsers w/ large lex functions

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This commit is contained in:
Max Brunsfeld 2018-09-12 15:01:46 -07:00
parent dadd100fc3
commit 78b54810a6
1 changed files with 13 additions and 2 deletions
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15
src/compiler/generate_code/c_code.cc
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@ -106,7 +106,7 @@ class CCodeGenerator {
buffer = "";
add_includes();
add_warning_pragma();
add_pragmas();
add_stats();
add_symbol_enum();
add_symbol_names_list();
@ -142,12 +142,23 @@ class CCodeGenerator {
line();
}
void add_warning_pragma() {
void add_pragmas() {
line("#if defined(__GNUC__) || defined(__clang__)");
line("#pragma GCC diagnostic push");
line("#pragma GCC diagnostic ignored \"-Wmissing-field-initializers\"");
line("#endif");
line();
// Compiling large lexer functions can be very slow, especially when
// using Visual Studio on Windows. Disabling optimizations is not
// ideal, but only a very small fraction of overall parse time is
// spent lexing, so the performance impact of this is pretty small.
if (main_lex_table.states.size() > 500) {
line("#ifdef _MSC_VER");
line("#pragma optimize(\"\", off)");
line("#endif");
line();
}
}
void add_stats() {