Add an accessor for IRInst opcode (#1707)

* Add an accessor for IRInst opcode

This main changing is renaming `IRInst::op` over to `IRInst::m_op` and then adds an accessor `IRInst::getOp()` to read it. The rest of the changes are just changing use sites to `getOp` (or to `m_op` in the limited cases where we write to it).

This work is in anticipation of a future change that might need to store an extra bit in the same field as the opcode. It seemed better to do this massive refactoring as a separate PR.

* fixup

1 files changed, 1 insertions, 1 deletions

diff --git a/source/slang/slang-ir-clone.cpp b/source/slang/slang-ir-clone.cpp
index 8155a4d34..f4dc81991 100644
--- a/source/slang/slang-ir-clone.cpp
+++ b/source/slang/slang-ir-clone.cpp
@@ -79,7 +79,7 @@ IRInst* cloneInstAndOperands(
     UInt operandCount = oldInst->getOperandCount();
     auto newInst = builder->emitIntrinsicInst(
         newType,
-        oldInst->op,
+        oldInst->getOp(),
         operandCount,
         nullptr);