Fix SPIRV emit for small-integer texture types. (#4753)

* Fix SPIRV emit for small-integer texture types.

* Disable -emit-spirv-via-glsl test.

1 files changed, 16 insertions, 2 deletions

diff --git a/source/slang/slang-ir-util.cpp b/source/slang/slang-ir-util.cpp
index 8294cd533..e030b6d24 100644
--- a/source/slang/slang-ir-util.cpp
+++ b/source/slang/slang-ir-util.cpp
@@ -1557,10 +1557,24 @@ void hoistInstOutOfASMBlocks(IRBlock* block)
 IRType* getSPIRVSampledElementType(IRInst* sampledType)
 {
     auto sampledElementType = getVectorElementType((IRType*)sampledType);
-    if (sampledElementType->getOp() == kIROp_HalfType)
+    
+    IRBuilder builder(sampledType);
+    switch (sampledElementType->getOp())
     {
-        IRBuilder builder(sampledType);
+    case kIROp_HalfType:
         sampledElementType = builder.getBasicType(BaseType::Float);
+        break;
+    case kIROp_UInt16Type:
+    case kIROp_UInt8Type:
+    case kIROp_CharType:
+        sampledElementType = builder.getBasicType(BaseType::UInt);
+        break;
+    case kIROp_Int8Type:
+    case kIROp_Int16Type:
+        sampledElementType = builder.getBasicType(BaseType::Int);
+        break;
+    default:
+        break;
     }
     return sampledElementType;
 }