From: Eric Christopher <echristo@gmail.com>
Date: Thu, 13 Dec 2012 06:48:05 +0000 (+0000)
Subject: Revert "Restore the PHI optimization I accidently removed" temporarily since
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=dcb024d27c1e303959005d64b4ae70d695fd0564;p=oota-llvm.git

Revert "Restore the PHI optimization I accidently removed" temporarily since
it seems to be breaking self-host for a few people and is PR14592.

This reverts commit r170024.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170106 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/lib/Transforms/InstCombine/InstCombineAddSub.cpp
index 01a3c48635a..c22249527b9 100644
--- a/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ b/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -354,10 +354,6 @@ Instruction *InstCombiner::visitFAdd(BinaryOperator &I) {
   if (Value *V = SimplifyFAddInst(LHS, RHS, I.getFastMathFlags(), TD))
     return ReplaceInstUsesWith(I, V);
 
-  if (isa<PHINode>(LHS))
-    if (Instruction *NV = FoldOpIntoPhi(I))
-      return NV;
-
   // -A + B  -->  B - A
   // -A + -B  -->  -(A + B)
   if (Value *LHSV = dyn_castFNegVal(LHS))