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cbe: implement cmp_lt_errors_len

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This commit is contained in:
Jacob Young 2022-10-24 20:53:55 -04:00
parent e470cf361f
commit 361035fe7a
2 changed files with 16 additions and 3 deletions
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18
src/codegen/c.zig
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@ -2078,7 +2078,6 @@ pub fn genGlobalAsm(mod: *Module, code: *std.ArrayList(u8)) !void {
}
pub fn genErrDecls(o: *Object) !void {
if (o.dg.module.global_error_set.size == 0) return;
const writer = o.writer();
try writer.writeAll("enum {\n");
@ -2373,7 +2372,7 @@ fn genBody(f: *Function, body: []const Air.Inst.Index) error{ AnalysisFail, OutO
.cmp_neq => try airEquality(f, inst, "!((", "!="),
.cmp_vector => return f.fail("TODO: C backend: implement cmp_vector", .{}),
.cmp_lt_errors_len => return f.fail("TODO: C backend: implement cmp_lt_errors_len", .{}),
.cmp_lt_errors_len => try airCmpLtErrorsLen(f, inst),
// bool_and and bool_or are non-short-circuit operations
.bool_and, .bit_and => try airBinOp(f, inst, "&", "and", .None),
@ -3176,6 +3175,21 @@ fn airEquality(
return local;
}
fn airCmpLtErrorsLen(f: *Function, inst: Air.Inst.Index) !CValue {
if (f.liveness.isUnused(inst)) return CValue.none;
const un_op = f.air.instructions.items(.data)[inst].un_op;
const inst_ty = f.air.typeOfIndex(inst);
const operand = try f.resolveInst(un_op);
const writer = f.object.writer();
const local = try f.allocLocal(inst_ty, .Const);
try writer.writeAll(" = ");
try f.writeCValue(writer, operand, .Other);
try writer.print(" < sizeof({ }) / sizeof(*{0 });\n", .{fmtIdent("zig_errorName")});
return local;
}
fn airPtrAddSub(f: *Function, inst: Air.Inst.Index, operator: u8) !CValue {
if (f.liveness.isUnused(inst)) return CValue.none;

1
test/behavior/cast.zig
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@ -394,7 +394,6 @@ test "expected [*c]const u8, found [*:0]const u8" {
test "explicit cast from integer to error type" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO