[PATCH] D11817: Enable Shrink Wrapping for PPC64.

[NAKAMURA Takumi via llvm-commits]

chapuni added inline comments.

================
Comment at: lib/Target/PowerPC/PPCFrameLowering.cpp:1002
@@ -1011,20 +1001,3 @@
 
-  bool UsesTCRet =  RetOpcode == PPC::TCRETURNri ||
-    RetOpcode == PPC::TCRETURNdi ||
-    RetOpcode == PPC::TCRETURNai ||
-    RetOpcode == PPC::TCRETURNri8 ||
-    RetOpcode == PPC::TCRETURNdi8 ||
-    RetOpcode == PPC::TCRETURNai8;
-
-  if (UsesTCRet) {
-    int MaxTCRetDelta = FI->getTailCallSPDelta();
-    MachineOperand &StackAdjust = MBBI->getOperand(1);
-    assert(StackAdjust.isImm() && "Expecting immediate value.");
-    // Adjust stack pointer.
-    int StackAdj = StackAdjust.getImm();
-    int Delta = StackAdj - MaxTCRetDelta;
-    assert((Delta >= 0) && "Delta must be positive");
-    if (MaxTCRetDelta>0)
-      FrameSize += (StackAdj +Delta);
-    else
-      FrameSize += StackAdj;
+  bool IsReturnBlock = MBBI->isReturn();
+  
----------------
It is unsafe if MBBI points end iterator.
Tweaked in r247395. Please reconfirm.


http://reviews.llvm.org/D11817