[llvm-commits] [llvm] r163370 - /llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

[Michael Liao]

Author: hliao
Date: Fri Sep  7 00:13:00 2012
New Revision: 163370

URL: http://llvm.org/viewvc/llvm-project?rev=163370&view=rev
Log:
Stop emitting lifetime region info when stack coloring is not enabled in O0

- this should fix PR13780


Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp?rev=163370&r1=163369&r2=163370&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Fri Sep  7 00:13:00 2012
@@ -5218,6 +5218,12 @@
   }
   case Intrinsic::lifetime_start:
   case Intrinsic::lifetime_end: {
+    // Stack coloring is not enabled in O0, discard region information.
+    if (TM.getOptLevel() == CodeGenOpt::None) {
+      if (Intrinsic == Intrinsic::lifetime_start)
+        setValue(&I, DAG.getUNDEF(TLI.getPointerTy()));
+      return 0;
+    }
     SDValue Ops[2];
     AllocaInst *LifetimeObject =dyn_cast_or_null<AllocaInst>(
                                    GetUnderlyingObject(I.getArgOperand(1), TD));