[PATCH] D47874: [SCEVExpander] Ignore dbg info when finding insertion point.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: vsk, aprantl, sanjoy.

This avoids creating unnecessary casts if the IP used to be a dbg info
intrinsic. Fixes PR37727.


https://reviews.llvm.org/D47874

Files:
  lib/Analysis/ScalarEvolutionExpander.cpp


Index: lib/Analysis/ScalarEvolutionExpander.cpp
===================================================================
--- lib/Analysis/ScalarEvolutionExpander.cpp
+++ lib/Analysis/ScalarEvolutionExpander.cpp
@@ -92,7 +92,7 @@
   if (auto *II = dyn_cast<InvokeInst>(I))
     IP = II->getNormalDest()->begin();
 
-  while (isa<PHINode>(IP))
+  while (isa<PHINode>(IP) || isa<DbgInfoIntrinsic>(IP))
     ++IP;
 
   if (isa<FuncletPadInst>(IP) || isa<LandingPadInst>(IP)) {


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