From c1d038a250ddcf761a9f7eba9d517a1a5e414cbd Mon Sep 17 00:00:00 2001
From: White-Green <43771790+White-Green@users.noreply.github.com>
Date: Mon, 28 Feb 2022 00:10:25 +0900
Subject: [PATCH 1/2] add OpUndef to global instruction

---
 vulkano/src/shader/spirv.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/vulkano/src/shader/spirv.rs b/vulkano/src/shader/spirv.rs
index cefcd25ddb..66649d51e4 100644
--- a/vulkano/src/shader/spirv.rs
+++ b/vulkano/src/shader/spirv.rs
@@ -229,7 +229,8 @@ impl Spirv {
                 | Instruction::SpecConstantFalse { .. }
                 | Instruction::SpecConstant { .. }
                 | Instruction::SpecConstantComposite { .. }
-                | Instruction::SpecConstantOp { .. } => set_range(&mut range_global, index)?,
+                | Instruction::SpecConstantOp { .. }
+                | Instruction::Undef { .. } => set_range(&mut range_global, index)?,
                 Instruction::Variable { storage_class, .. }
                     if *storage_class != StorageClass::Function =>
                 {

From 5aa51c9069745e9bb9ccee79f01ce386aa69a9bb Mon Sep 17 00:00:00 2001
From: White-Green <43771790+White-Green@users.noreply.github.com>
Date: Mon, 28 Feb 2022 00:58:57 +0900
Subject: [PATCH 2/2] allow OpUndef in function body

---
 vulkano/src/shader/spirv.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/vulkano/src/shader/spirv.rs b/vulkano/src/shader/spirv.rs
index 66649d51e4..f14a676830 100644
--- a/vulkano/src/shader/spirv.rs
+++ b/vulkano/src/shader/spirv.rs
@@ -229,8 +229,8 @@ impl Spirv {
                 | Instruction::SpecConstantFalse { .. }
                 | Instruction::SpecConstant { .. }
                 | Instruction::SpecConstantComposite { .. }
-                | Instruction::SpecConstantOp { .. }
-                | Instruction::Undef { .. } => set_range(&mut range_global, index)?,
+                | Instruction::SpecConstantOp { .. } => set_range(&mut range_global, index)?,
+                Instruction::Undef { .. } if !in_function => set_range(&mut range_global, index)?,
                 Instruction::Variable { storage_class, .. }
                     if *storage_class != StorageClass::Function =>
                 {