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stage2: wasm: implement struct_field_val

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Andrew Kelley 2021-10-19 19:20:31 -07:00
parent e4c437f23b
commit 2192d404d5
1 changed files with 10 additions and 0 deletions
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10
src/codegen/wasm.zig
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@ -866,6 +866,7 @@ pub const Context = struct {
.struct_field_ptr_index_1 => self.airStructFieldPtrIndex(inst, 1),
.struct_field_ptr_index_2 => self.airStructFieldPtrIndex(inst, 2),
.struct_field_ptr_index_3 => self.airStructFieldPtrIndex(inst, 3),
.struct_field_val => self.airStructFieldVal(inst),
.switch_br => self.airSwitchBr(inst),
.unreach => self.airUnreachable(inst),
.wrap_optional => self.airWrapOptional(inst),
@ -1456,6 +1457,15 @@ pub const Context = struct {
return WValue{ .local = struct_ptr.multi_value.index + index };
}
fn airStructFieldVal(self: *Context, inst: Air.Inst.Index) InnerError!WValue {
if (self.liveness.isUnused(inst)) return WValue.none;
const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
const extra = self.air.extraData(Air.StructField, ty_pl.payload).data;
const struct_multivalue = self.resolveInst(extra.struct_operand).multi_value;
return WValue{ .local = struct_multivalue.index + extra.field_index };
}
fn airSwitchBr(self: *Context, inst: Air.Inst.Index) InnerError!WValue {
// result type is always 'noreturn'
const blocktype = wasm.block_empty;