Add a new pass to undo harmful instcombines (#550)
Fixes #549
* New pass to undo harmful instcombine transforms
* Currently handles two cases that produce wide vectors seen in CTS
* Add tests
diff --git a/lib/Passes.cpp b/lib/Passes.cpp
index 872a75d..4de09f1 100644
--- a/lib/Passes.cpp
+++ b/lib/Passes.cpp
@@ -50,6 +50,7 @@
initializeUndoBoolPassPass(r);
initializeUndoByvalPassPass(r);
initializeUndoGetElementPtrConstantExprPassPass(r);
+ initializeUndoInstCombinePassPass(r);
initializeUndoSRetPassPass(r);
initializeUndoTranslateSamplerFoldPassPass(r);
initializeUndoTruncatedSwitchConditionPassPass(r);