From f2c68d71c8e25a1b9ce35ab713a2960833c6115f Mon Sep 17 00:00:00 2001
From: charles-r-earp <charles.r.earp@gmail.com>
Date: Tue, 7 Nov 2023 12:54:48 -0800
Subject: [PATCH] Allow spec constant convert ops. (#2399)

---
 vulkano/src/shader/spirv/specialization.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/vulkano/src/shader/spirv/specialization.rs b/vulkano/src/shader/spirv/specialization.rs
index 4f990e26..f6fcd43d 100644
--- a/vulkano/src/shader/spirv/specialization.rs
+++ b/vulkano/src/shader/spirv/specialization.rs
@@ -341,8 +341,14 @@ fn evaluate_spec_constant_op(
 
     let constant_to_instruction = |constant_id: Id| -> SmallVec<[Instruction; 1]> {
         let constant = &constants[&constant_id];
-        debug_assert_eq!(constant.type_id, result_type_id);
-
+        if !matches!(
+            opcode,
+            SpecConstantInstruction::UConvert { .. }
+                | SpecConstantInstruction::SConvert { .. }
+                | SpecConstantInstruction::FConvert { .. }
+        ) {
+            debug_assert_eq!(constant.type_id, result_type_id);
+        }
         match constant.value {
             ConstantValue::Scalar(value) => smallvec![scalar_constant_to_instruction(
                 result_type_id,