From: Dale Johannesen <dalej@apple.com>
Date: Mon, 20 Apr 2009 22:19:33 +0000 (+0000)
Subject: Adjust loop size estimate for full unrolling;
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=23300aa3e387ffd7e478804568c3754f59df7942;p=oota-llvm.git

Adjust loop size estimate for full unrolling;
GEP's don't usually become instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69631 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/LoopUnroll.cpp b/lib/Transforms/Scalar/LoopUnroll.cpp
index 2025fb68288..23757cdb2d2 100644
--- a/lib/Transforms/Scalar/LoopUnroll.cpp
+++ b/lib/Transforms/Scalar/LoopUnroll.cpp
@@ -89,6 +89,8 @@ static unsigned ApproximateLoopSize(const Loop *L) {
         // Ignore instructions only used by the loop terminator.
       } else if (isa<DbgInfoIntrinsic>(I)) {
         // Ignore debug instructions
+      } else if (isa<GetElementPtrInst>(I) && I->hasOneUse()) {
+        // Ignore GEP as they generally are subsumed into a load or store.
       } else if (isa<CallInst>(I)) {
         // Estimate size overhead introduced by call instructions which
         // is higher than other instructions. Here 3 and 10 are magic