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propagate attributes from builtins to call sites

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Folkert 2022-03-30 17:32:48 +02:00
parent d49ee97216
commit 20104a1159
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1 changed files with 17 additions and 44 deletions
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61
compiler/gen_llvm/src/llvm/bitcode.rs
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@ -131,62 +131,35 @@ fn call_bitcode_fn_help<'a, 'ctx, 'env>(
let call = env.builder.build_call(fn_val, &arguments, "call_builtin");
// Attributes that we propagate from the zig builtin paramters, to the arguments we give to the
// call. It is undefined behavior in LLVM to have an attribute on a parameter, and then call
// the function where that parameter is not present. For many (e.g. nonnull) it can be inferred
// but e.g. byval and sret cannot and must be explicitly provided.
let propagate = [
Attribute::get_named_enum_kind_id("nonnull"),
Attribute::get_named_enum_kind_id("nocapture"),
Attribute::get_named_enum_kind_id("readonly"),
Attribute::get_named_enum_kind_id("noalias"),
Attribute::get_named_enum_kind_id("sret"),
Attribute::get_named_enum_kind_id("byval"),
];
for i in 0..fn_val.count_params() {
let attributes = fn_val.attributes(AttributeLoc::Param(i));
for attribute in attributes {
if attribute.is_type() {}
call.add_attribute(AttributeLoc::Param(i), attribute)
}
}
let kind_id = attribute.get_enum_kind_id();
match fn_name {
bitcode::STR_NUMBER_OF_BYTES | bitcode::STR_COUNT_GRAPEHEME_CLUSTERS => {
string_argument(env, call, 0);
if propagate.contains(&kind_id) {
call.add_attribute(AttributeLoc::Param(i), attribute)
}
}
bitcode::STR_ENDS_WITH | bitcode::STR_STARTS_WITH => {
string_argument(env, call, 0);
string_argument(env, call, 1);
}
bitcode::STR_STR_SPLIT_IN_PLACE => {
string_argument(env, call, 0);
string_argument(env, call, 1);
dbg!(fn_val.get_type());
}
_ => {}
}
call.set_call_convention(fn_val.get_call_conventions());
call
}
fn string_argument<'a, 'ctx, 'env>(
env: &Env<'a, 'ctx, 'env>,
call: CallSiteValue,
parameter_index: u32,
) {
call.add_attribute(
AttributeLoc::Param(0),
type_attribute(env.context, "byval", zig_str_type(env).into()),
);
call.add_attribute(
AttributeLoc::Param(parameter_index as u32),
enum_attribute(env.context, "nonnull"),
);
call.add_attribute(
AttributeLoc::Param(parameter_index as u32),
enum_attribute(env.context, "nocapture"),
);
call.add_attribute(
AttributeLoc::Param(parameter_index as u32),
enum_attribute(env.context, "readonly"),
);
}
pub fn call_bitcode_fn_fixing_for_convention<'a, 'ctx, 'env>(
env: &Env<'a, 'ctx, 'env>,
args: &[BasicValueEnum<'ctx>],