From 4931b8dc93ee4a99a415dffab03d400e95d1a90a Mon Sep 17 00:00:00 2001
From: Robin Voetter <robin@voetter.nl>
Date: Sat, 8 Jan 2022 02:02:01 +0100
Subject: stage2: @errorName sema+llvm

---
 src/codegen/c.zig | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src/codegen/c.zig')

diff --git a/src/codegen/c.zig b/src/codegen/c.zig
index 922e1d9c3e..e85ca6c705 100644
--- a/src/codegen/c.zig
+++ b/src/codegen/c.zig
@@ -1244,6 +1244,7 @@ fn genBody(f: *Function, body: []const Air.Inst.Index) error{ AnalysisFail, OutO
             .ctz              => try airBuiltinCall(f, inst, "ctz"),
             .popcount         => try airBuiltinCall(f, inst, "popcount"),
             .tag_name         => try airTagName(f, inst),
+            .error_name       => try airErrorName(f, inst),
 
             .int_to_float,
             .float_to_int,
@@ -2998,6 +2999,22 @@ fn airTagName(f: *Function, inst: Air.Inst.Index) !CValue {
     //return local;
 }
 
+fn airErrorName(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 writer = f.object.writer();
+    const inst_ty = f.air.typeOfIndex(inst);
+    const operand = try f.resolveInst(un_op);
+    const local = try f.allocLocal(inst_ty, .Const);
+
+    try writer.writeAll(" = ");
+
+    _ = operand;
+    _ = local;
+    return f.fail("TODO: C backend: implement airErrorName", .{});
+}
+
 fn toMemoryOrder(order: std.builtin.AtomicOrder) [:0]const u8 {
     return switch (order) {
         .Unordered => "memory_order_relaxed",
-- 
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