[SPIRV][NFC] Fix warning on class/struct mismatch

Clang issues a warning on class/struct mismatch because the MSVC ABI
varries for classes and structs.

diff --git a/llvm/lib/Target/SPIRV/SPIRVMCInstLower.h b/llvm/lib/Target/SPIRV/SPIRVMCInstLower.h
index 66fa903..8392656 100644 (file)
--- a/llvm/lib/Target/SPIRV/SPIRVMCInstLower.h
+++ b/llvm/lib/Target/SPIRV/SPIRVMCInstLower.h
@@ -15,7 +15,7 @@ namespace llvm {
 class MCInst;
 class MachineInstr;
 namespace SPIRV {
-class ModuleAnalysisInfo;
+struct ModuleAnalysisInfo;
 } // namespace SPIRV
 
 // This class is used to lower a MachineInstr into an MCInst.