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LLVM: support calls to varargs functions

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closes #11944
This commit is contained in:
Andrew Kelley 2022-06-27 16:02:41 -07:00
parent 3b19869853
commit 8d8a5f9733
1 changed files with 19 additions and 3 deletions
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22
src/codegen/llvm.zig
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@ -4197,7 +4197,7 @@ pub const FuncGen = struct {
}
var it = iterateParamTypes(self.dg, fn_info);
while (it.next()) |lowering| switch (lowering) {
while (it.nextCall(self, args)) |lowering| switch (lowering) {
.no_bits => continue,
.byval => {
const arg = args[it.zig_index - 1];
@ -9004,10 +9004,26 @@ const ParamTypeIterator = struct {
slice,
};
fn next(it: *ParamTypeIterator) ?Lowering {
pub fn next(it: *ParamTypeIterator) ?Lowering {
if (it.zig_index >= it.fn_info.param_types.len) return null;
const ty = it.fn_info.param_types[it.zig_index];
return nextInner(it, ty);
}
/// `airCall` uses this instead of `next` so that it can take into account variadic functions.
pub fn nextCall(it: *ParamTypeIterator, fg: *FuncGen, args: []const Air.Inst.Ref) ?Lowering {
if (it.zig_index >= it.fn_info.param_types.len) {
if (it.zig_index >= args.len) {
return null;
} else {
return nextInner(it, fg.air.typeOf(args[it.zig_index]));
}
} else {
return nextInner(it, it.fn_info.param_types[it.zig_index]);
}
}
fn nextInner(it: *ParamTypeIterator, ty: Type) ?Lowering {
if (!ty.hasRuntimeBitsIgnoreComptime()) {
it.zig_index += 1;
return .no_bits;