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x86_64: implement global payload pointers

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This commit is contained in:
Jacob Young
2023-05-13 02:24:41 -04:00
parent 2cbd442a9d
commit 57c38f6433
3 changed files with 35 additions and 8 deletions
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34
src/codegen.zig
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@@ -380,7 +380,7 @@ pub fn generateSymbol(
return Result.ok;
},
.field_ptr, .elem_ptr => return lowerParentPtr(
.field_ptr, .elem_ptr, .opt_payload_ptr => return lowerParentPtr(
bin_file,
src_loc,
typed_value,
@@ -812,7 +812,6 @@ fn lowerParentPtr(
reloc_info: RelocInfo,
) CodeGenError!Result {
const target = bin_file.options.target;
switch (parent_ptr.tag()) {
.field_ptr => {
const field_ptr = parent_ptr.castTag(.field_ptr).?.data;
@@ -858,6 +857,31 @@ fn lowerParentPtr(
reloc_info.offset(@intCast(u32, elem_ptr.index * elem_ptr.elem_ty.abiSize(target))),
);
},
.opt_payload_ptr => {
const opt_payload_ptr = parent_ptr.castTag(.opt_payload_ptr).?.data;
return lowerParentPtr(
bin_file,
src_loc,
typed_value,
opt_payload_ptr.container_ptr,
code,
debug_output,
reloc_info,
);
},
.eu_payload_ptr => {
const eu_payload_ptr = parent_ptr.castTag(.eu_payload_ptr).?.data;
const pl_ty = eu_payload_ptr.container_ty.errorUnionPayload();
return lowerParentPtr(
bin_file,
src_loc,
typed_value,
eu_payload_ptr.container_ptr,
code,
debug_output,
reloc_info.offset(@intCast(u32, errUnionPayloadOffset(pl_ty, target))),
);
},
.variable, .decl_ref, .decl_ref_mut => |tag| return lowerDeclRef(
bin_file,
src_loc,
@@ -1262,9 +1286,10 @@ pub fn genTypedValue(
}
pub fn errUnionPayloadOffset(payload_ty: Type, target: std.Target) u64 {
if (!payload_ty.hasRuntimeBitsIgnoreComptime()) return 0;
const payload_align = payload_ty.abiAlignment(target);
const error_align = Type.anyerror.abiAlignment(target);
if (payload_align >= error_align) {
if (payload_align >= error_align or !payload_ty.hasRuntimeBitsIgnoreComptime()) {
return 0;
} else {
return mem.alignForwardGeneric(u64, Type.anyerror.abiSize(target), payload_align);
@@ -1272,9 +1297,10 @@ pub fn errUnionPayloadOffset(payload_ty: Type, target: std.Target) u64 {
}
pub fn errUnionErrorOffset(payload_ty: Type, target: std.Target) u64 {
if (!payload_ty.hasRuntimeBitsIgnoreComptime()) return 0;
const payload_align = payload_ty.abiAlignment(target);
const error_align = Type.anyerror.abiAlignment(target);
if (payload_align >= error_align) {
if (payload_align >= error_align and payload_ty.hasRuntimeBitsIgnoreComptime()) {
return mem.alignForwardGeneric(u64, payload_ty.abiSize(target), error_align);
} else {
return 0;