Overhauled reverse-mode control flow handling (#2608)

* Added switch-case support; fixed non-diff parameter transposition

* Made region propagation much more robust. Partial loop unzip implementation

* WIP: Added most loop handling code, and a test. Still untested

* Added CFG Normalization pass + CFG Reversal Pass + Loop Unzipping + most loop transcription

* Add single-iter-loop test.

* proj files

* removed comments

* Update reverse-loop.slang

* Removed out-of-date code

* Disabled IR validation during constructSSA phase of normalizeCFG. constructSSA now reuses sharedBuilder

* Moved normalizeCFG() call to prepareFuncForBackwardDiff()

1 files changed, 1 insertions, 1 deletions

diff --git a/source/slang/slang-ir-autodiff-transcriber-base.cpp b/source/slang/slang-ir-autodiff-transcriber-base.cpp
index f43206333..05a5f8f56 100644
--- a/source/slang/slang-ir-autodiff-transcriber-base.cpp
+++ b/source/slang/slang-ir-autodiff-transcriber-base.cpp
@@ -960,8 +960,8 @@ InstPair AutoDiffTranscriberBase::transcribeInst(IRBuilder* builder, IRInst* ori
             }
             else
             {
-                auto diffType = _differentiateTypeImpl(builder, origType);
                 IRInst* primal = maybeCloneForPrimalInst(builder, origType);
+                auto diffType = _differentiateTypeImpl(builder, origType);
                 result = InstPair(primal, diffType);
             }
         }