From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Sun, 30 Jan 2011 20:38:12 +0000 (+0000)
Subject: Respect the -tail-dup-size command line option even when optimizing for size.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8352062e52eed6e50786fdb89f5e601fdcbe0d90;p=oota-llvm.git

Respect the -tail-dup-size command line option even when optimizing for size.

This is similar to the -unroll-threshold option. There should be no change in
behavior when -tail-dup-size is not explicit on the llc command line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124564 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/TailDuplication.cpp b/lib/CodeGen/TailDuplication.cpp
index 15aed3436c7..83706deb3f7 100644
--- a/lib/CodeGen/TailDuplication.cpp
+++ b/lib/CodeGen/TailDuplication.cpp
@@ -459,7 +459,8 @@ TailDuplicatePass::TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF,
   // duplicate only one, because one branch instruction can be eliminated to
   // compensate for the duplication.
   unsigned MaxDuplicateCount;
-  if (MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize))
+  if (TailDuplicateSize.getNumOccurrences() == 0 &&
+      MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize))
     MaxDuplicateCount = 1;
   else
     MaxDuplicateCount = TailDuplicateSize;