Machine LICM increases register pressure and it almost always increase code size. For now, disable it for optimizing for size.
llvm-svn: 63856
diff --git a/llvm/lib/CodeGen/MachineLICM.cpp b/llvm/lib/CodeGen/MachineLICM.cpp
index 76d5f37..dd32977 100644
--- a/llvm/lib/CodeGen/MachineLICM.cpp
+++ b/llvm/lib/CodeGen/MachineLICM.cpp
@@ -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;