Disallow assigning no mask flags for ld raw instructions

This change is to prevent from assigning no mask flags for ld raw instructions which contribute to sample coordinates as it may cause OOB access and page faults.

Author: krystian-andrzejewski

IGC/Compiler/CISACodeGen/EmitVISAPass.cpp

@@ -269,11 +269,30 @@ bool EmitPass::IsNoMaskAllowed(SDAG& sdag)
 {
     if (auto* I = dyn_cast<LoadInst>(sdag.m_root))
     {
-        BufferType bufType = DecodeBufferType(I->getPointerAddressSpace());
-        return I->getPointerAddressSpace() != ADDRESS_SPACE_PRIVATE &&
-               I->getPointerAddressSpace() != ADDRESS_SPACE_GLOBAL &&
-               I->getPointerAddressSpace() != ADDRESS_SPACE_CONSTANT &&
-               !(bufType == CONSTANT_BUFFER && m_currShader->GetContext()->getModuleMetaData()->compOpt.WaDisableSubspanUseNoMaskForCB);
+        switch (I->getPointerAddressSpace())
+        {
+        case ADDRESS_SPACE_PRIVATE:
+        case ADDRESS_SPACE_GLOBAL:
+        case ADDRESS_SPACE_CONSTANT:
+            return false;
+        default:
+        {
+            BufferType bufType = DecodeBufferType(I->getPointerAddressSpace());
+            return bufType != CONSTANT_BUFFER ||
+                !m_currShader->GetContext()->getModuleMetaData()->compOpt.WaDisableSubspanUseNoMaskForCB;
+        }
+        }
+    }
+    else if (auto* I = dyn_cast<GenIntrinsicInst>(sdag.m_root))
+    {
+        switch (I->getIntrinsicID())
+        {
+        case GenISAIntrinsic::GenISA_ldraw_indexed:
+        case GenISAIntrinsic::GenISA_ldrawvector_indexed:
+            return false;
+        default:
+            break;
+        }
     }
 
     return true;