[llvm-commits] [llvm] r124564 - /llvm/trunk/lib/CodeGen/TailDuplication.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Sun Jan 30 14:38:12 2011
New Revision: 124564

URL: http://llvm.org/viewvc/llvm-project?rev=124564&view=rev
Log:
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.

Modified:
    llvm/trunk/lib/CodeGen/TailDuplication.cpp

Modified: llvm/trunk/lib/CodeGen/TailDuplication.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TailDuplication.cpp?rev=124564&r1=124563&r2=124564&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TailDuplication.cpp (original)
+++ llvm/trunk/lib/CodeGen/TailDuplication.cpp Sun Jan 30 14:38:12 2011
@@ -459,7 +459,8 @@
   // 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;