Don't run stack slot coloring if -fast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52933 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 1c8ce0a..97fe35c 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -99,7 +99,8 @@
   PM.add(createRegisterAllocator());
   
   // Perform stack slot coloring.
-  PM.add(createStackSlotColoringPass());
+  if (!Fast)
+    PM.add(createStackSlotColoringPass());
 
   if (PrintMachineCode)  // Print the register-allocated code
     PM.add(createMachineFunctionPrinterPass(cerr));
@@ -235,7 +236,8 @@
   PM.add(createRegisterAllocator());
 
   // Perform stack slot coloring.
-  PM.add(createStackSlotColoringPass());
+  if (!Fast)
+    PM.add(createStackSlotColoringPass());
 
   if (PrintMachineCode)
     PM.add(createMachineFunctionPrinterPass(cerr));