[llvm-commits] [llvm] r99332 - /llvm/trunk/lib/Analysis/ScalarEvolutionExpander.cpp

[Dan Gohman]

Author: djg
Date: Tue Mar 23 16:53:22 2010
New Revision: 99332

URL: http://llvm.org/viewvc/llvm-project?rev=99332&view=rev
Log:
Don't back past debug info intrinsics; SCEVExpander's strategy
for ignoring debug info intrinsics everywhere else is to advance
past them, and it needs to be consistent.

Modified:
    llvm/trunk/lib/Analysis/ScalarEvolutionExpander.cpp

Modified: llvm/trunk/lib/Analysis/ScalarEvolutionExpander.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ScalarEvolutionExpander.cpp?rev=99332&r1=99331&r2=99332&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ScalarEvolutionExpander.cpp (original)
+++ llvm/trunk/lib/Analysis/ScalarEvolutionExpander.cpp Tue Mar 23 16:53:22 2010
@@ -1268,19 +1268,8 @@
        L = L->getParentLoop())
     if (S->isLoopInvariant(L)) {
       if (!L) break;
-      if (BasicBlock *Preheader = L->getLoopPreheader()) {
+      if (BasicBlock *Preheader = L->getLoopPreheader())
         InsertPt = Preheader->getTerminator();
-        BasicBlock::iterator IP = InsertPt;
-        // Back past any debug info instructions.  Sometimes we inserted
-        // something earlier before debug info but after any real instructions.
-        // This should behave the same as if debug info was not present.
-        while (IP != Preheader->begin()) {
-          --IP;
-          if (!isa<DbgInfoIntrinsic>(IP))
-            break;
-          InsertPt = IP;
-        }
-      }
     } else {
       // If the SCEV is computable at this level, insert it into the header
       // after the PHIs (and after any other instructions that we've inserted