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Define the behaviour of integer division by zero

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gingerBill
2025-08-08 10:00:11 +01:00
parent 3194fda8f3
commit e4a0228a80
4 changed files with 247 additions and 30 deletions
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30
src/main.cpp
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@@ -392,6 +392,8 @@ enum BuildFlagKind {
BuildFlag_PrintLinkerFlags,
BuildFlag_IntegerDivisionByZero,
// internal use only
BuildFlag_InternalFastISel,
BuildFlag_InternalIgnoreLazy,
@@ -613,6 +615,9 @@ gb_internal bool parse_build_flags(Array<String> args) {
add_flag(&build_flags, BuildFlag_PrintLinkerFlags, str_lit("print-linker-flags"), BuildFlagParam_None, Command_build);
add_flag(&build_flags, BuildFlag_IntegerDivisionByZero, str_lit("integer-division-by-zero"), BuildFlagParam_String, Command__does_check);
add_flag(&build_flags, BuildFlag_InternalFastISel, str_lit("internal-fast-isel"), BuildFlagParam_None, Command_all);
add_flag(&build_flags, BuildFlag_InternalIgnoreLazy, str_lit("internal-ignore-lazy"), BuildFlagParam_None, Command_all);
add_flag(&build_flags, BuildFlag_InternalIgnoreLLVMBuild, str_lit("internal-ignore-llvm-build"),BuildFlagParam_None, Command_all);
@@ -1515,7 +1520,7 @@ gb_internal bool parse_build_flags(Array<String> args) {
} else if (str_eq_ignore_case(value.value_string, str_lit("unix"))) {
build_context.ODIN_ERROR_POS_STYLE = ErrorPosStyle_Unix;
} else {
gb_printf_err("-error-pos-style options are 'unix', 'odin' and 'default' (odin)\n");
gb_printf_err("-error-pos-style options are 'unix', 'odin', and 'default' (odin)\n");
bad_flags = true;
}
break;
@@ -1539,6 +1544,18 @@ gb_internal bool parse_build_flags(Array<String> args) {
build_context.print_linker_flags = true;
break;
case BuildFlag_IntegerDivisionByZero:
GB_ASSERT(value.kind == ExactValue_String);
if (str_eq_ignore_case(value.value_string, "trap")) {
build_context.integer_division_by_zero_behaviour = IntegerDivisionByZero_Trap;
} else if (str_eq_ignore_case(value.value_string, "zero")) {
build_context.integer_division_by_zero_behaviour = IntegerDivisionByZero_Zero;
} else {
gb_printf_err("-integer-division-by-zero options are 'trap' and 'zero'.\n");
bad_flags = true;
}
break;
case BuildFlag_InternalFastISel:
build_context.fast_isel = true;
break;
@@ -2561,7 +2578,18 @@ gb_internal int print_show_help(String const arg0, String command, String option
if (print_flag("-ignore-warnings")) {
print_usage_line(2, "Ignores warning messages.");
}
}
if (check) {
if (print_flag("-integer-division-by-zero:<strng>")) {
print_usage_line(2, "Specifies the default behaviour for integer division by zero.");
print_usage_line(2, "Available Options:");
print_usage_line(3, "-integer-division-by-zero:trap Trap on division/modulo/remainder by zero");
print_usage_line(3, "-integer-division-by-zero:zero x/0 == 0 and x%%0 == x and x%%%%0 == 0");
}
}
if (check) {
if (print_flag("-json-errors")) {
print_usage_line(2, "Prints the error messages as json to stderr.");
}