[llvm-commits] [llvm] r63856 - /llvm/trunk/lib/CodeGen/MachineLICM.cpp

[Evan Cheng]

Author: evancheng
Date: Thu Feb  5 02:51:13 2009
New Revision: 63856

URL: http://llvm.org/viewvc/llvm-project?rev=63856&view=rev
Log:
Machine LICM increases register pressure and it almost always increase code size. For now, disable it for optimizing for size.

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

Modified: llvm/trunk/lib/CodeGen/MachineLICM.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineLICM.cpp?rev=63856&r1=63855&r2=63856&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/MachineLICM.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineLICM.cpp Thu Feb  5 02:51:13 2009
@@ -126,6 +126,10 @@
 /// loop.
 ///
 bool MachineLICM::runOnMachineFunction(MachineFunction &MF) {
+  const Function *F = MF.getFunction();
+  if (F->hasFnAttr(Attribute::OptimizeForSize))
+    return false;
+
   DOUT << "******** Machine LICM ********\n";
 
   Changed = false;