Fix memory leak in the stackifier, due to the machinebasicblocks not holding

instructions on an ilist


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10556 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/FloatingPoint.cpp

@@ -601,6 +601,7 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &I) {
   }
 
   I = MBB->erase(I)-1;  // Remove the pseudo instruction
+  delete MI;
 }
 
 namespace {

lib/Target/X86/X86FloatingPoint.cpp

@@ -601,6 +601,7 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &I) {
   }
 
   I = MBB->erase(I)-1;  // Remove the pseudo instruction
+  delete MI;
 }
 
 namespace {