From be26c3bf4e4c6a7654ea68e6606c1167ef969a09 Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Sun, 1 Nov 2020 22:14:08 +0100
Subject: stage1: Fix *WithOverflow intrinsics with u0 values

Closes #5369
---
 src/stage1/ir.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/stage1/ir.cpp')

diff --git a/src/stage1/ir.cpp b/src/stage1/ir.cpp
index 3fea4ed7f0..91fb81c24a 100644
--- a/src/stage1/ir.cpp
+++ b/src/stage1/ir.cpp
@@ -28880,6 +28880,10 @@ static IrInstGen *ir_analyze_instruction_overflow_op(IrAnalyze *ira, IrInstSrcOv
     if (type_is_invalid(casted_result_ptr->value->type))
         return ira->codegen->invalid_inst_gen;
 
+    // Don't write anything to the result pointer.
+    if (dest_type->data.integral.bit_count == 0)
+        return ir_const_bool(ira, &instruction->base.base, false);
+
     if (instr_is_comptime(casted_op1) &&
         instr_is_comptime(casted_op2) &&
         instr_is_comptime(casted_result_ptr))
-- 
cgit v1.2.3