error return traces for the early return case

it would work but LLVM is not correctly spilling the addresses.

See #821

1 files changed, 23 insertions, 1 deletions

diff --git a/src/ir_print.cpp b/src/ir_print.cpp
index b14d49a4ca..432d287bb8 100644
--- a/src/ir_print.cpp
+++ b/src/ir_print.cpp
@@ -1024,7 +1024,16 @@ static void ir_print_export(IrPrint *irp, IrInstructionExport *instruction) {
 }
 
 static void ir_print_error_return_trace(IrPrint *irp, IrInstructionErrorReturnTrace *instruction) {
-    fprintf(irp->f, "@errorReturnTrace()");
+    fprintf(irp->f, "@errorReturnTrace(");
+    switch (instruction->nullable) {
+        case IrInstructionErrorReturnTrace::Null:
+            fprintf(irp->f, "Null");
+            break;
+        case IrInstructionErrorReturnTrace::NonNull:
+            fprintf(irp->f, "NonNull");
+            break;
+    }
+    fprintf(irp->f, ")");
 }
 
 static void ir_print_error_union(IrPrint *irp, IrInstructionErrorUnion *instruction) {
@@ -1179,6 +1188,16 @@ static void ir_print_add_implicit_return_type(IrPrint *irp, IrInstructionAddImpl
     fprintf(irp->f, ")");
 }
 
+static void ir_print_merge_err_ret_traces(IrPrint *irp, IrInstructionMergeErrRetTraces *instruction) {
+    fprintf(irp->f, "@mergeErrRetTraces(");
+    ir_print_other_instruction(irp, instruction->coro_promise_ptr);
+    fprintf(irp->f, ",");
+    if (instruction->resolved_field != nullptr) {
+        fprintf(irp->f, "field '%s'", buf_ptr(instruction->resolved_field->name));
+    }
+    fprintf(irp->f, ")");
+}
+
 static void ir_print_instruction(IrPrint *irp, IrInstruction *instruction) {
     ir_print_prefix(irp, instruction);
     switch (instruction->id) {
@@ -1559,6 +1578,9 @@ static void ir_print_instruction(IrPrint *irp, IrInstruction *instruction) {
         case IrInstructionIdAddImplicitReturnType:
             ir_print_add_implicit_return_type(irp, (IrInstructionAddImplicitReturnType *)instruction);
             break;
+        case IrInstructionIdMergeErrRetTraces:
+            ir_print_merge_err_ret_traces(irp, (IrInstructionMergeErrRetTraces *)instruction);
+            break;
     }
     fprintf(irp->f, "\n");
 }