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x86_64: implement fieldParentPtr

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This commit is contained in:
Jacob Young 2023-05-02 01:27:21 -04:00
parent 3f5592c114
commit 3a30b82741
3 changed files with 22 additions and 7 deletions
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26
src/arch/x86_64/CodeGen.zig
View File

@ -233,6 +233,13 @@ pub const MCValue = union(enum) {
};
}
fn isRegisterOffset(mcv: MCValue) bool {
return switch (mcv) {
.register, .register_offset => true,
else => false,
};
}
fn getReg(mcv: MCValue) ?Register {
return switch (mcv) {
.register => |reg| reg,
@ -4772,10 +4779,21 @@ fn airStructFieldVal(self: *Self, inst: Air.Inst.Index) !void {
}
fn airFieldParentPtr(self: *Self, inst: Air.Inst.Index) !void {
const ty_op = self.air.instructions.items(.data)[inst].ty_op;
_ = ty_op;
return self.fail("TODO implement airFieldParentPtr for {}", .{self.target.cpu.arch});
//return self.finishAir(inst, result, .{ ty_op.operand, .none, .none });
const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
const extra = self.air.extraData(Air.FieldParentPtr, ty_pl.payload).data;
const inst_ty = self.air.typeOfIndex(inst);
const parent_ty = inst_ty.childType();
const field_offset = @intCast(i32, parent_ty.structFieldOffset(extra.field_index, self.target.*));
const src_mcv = try self.resolveInst(extra.field_ptr);
const dst_mcv = if (src_mcv.isRegisterOffset() and
self.reuseOperand(inst, extra.field_ptr, 0, src_mcv))
src_mcv
else
try self.copyToRegisterWithInstTracking(inst, inst_ty, src_mcv);
const result = dst_mcv.offset(-field_offset);
return self.finishAir(inst, result, .{ extra.field_ptr, .none, .none });
}
fn genUnOp(self: *Self, maybe_inst: ?Air.Inst.Index, tag: Air.Inst.Tag, src_air: Air.Inst.Ref) !MCValue {

1
test/behavior/struct.zig
View File

@ -1333,7 +1333,6 @@ test "under-aligned struct field" {
}
test "fieldParentPtr of a zero-bit field" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO

2
test/behavior/tuple.zig
View File

@ -209,7 +209,6 @@ test "initializing anon struct with explicit type" {
}
test "fieldParentPtr of tuple" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
@ -220,7 +219,6 @@ test "fieldParentPtr of tuple" {
}
test "fieldParentPtr of anon struct" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO