From d0e7a3596ba480fdbc59644fd13859efe3024ea8 Mon Sep 17 00:00:00 2001
From: Robin Voetter <robin@voetter.nl>
Date: Sun, 8 Oct 2023 11:04:48 +0200
Subject: spirv: allow generation of *i0

---
 src/codegen/spirv.zig | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'src/codegen')

diff --git a/src/codegen/spirv.zig b/src/codegen/spirv.zig
index e8e1b89507..dc572d390e 100644
--- a/src/codegen/spirv.zig
+++ b/src/codegen/spirv.zig
@@ -1219,7 +1219,14 @@ const DeclGen = struct {
             },
             .Int => {
                 const int_info = ty.intInfo(mod);
-                // TODO: Integers in OpenCL kernels are always unsigned.
+                if (int_info.bits == 0) {
+                    // Some times, the backend will be asked to generate a pointer to i0. OpTypeInt
+                    // with 0 bits is invalid, so return an opaque type in this case.
+                    assert(repr == .indirect);
+                    return try self.spv.resolve(.{ .opaque_type = .{
+                        .name = try self.spv.resolveString("u0"),
+                    } });
+                }
                 return try self.intType(int_info.signedness, int_info.bits);
             },
             .Enum => {
-- 
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