[llvm-commits] [llvm] r136156 - /llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

[Dan Gohman]

Author: djg
Date: Tue Jul 26 17:00:59 2011
New Revision: 136156

URL: http://llvm.org/viewvc/llvm-project?rev=136156&view=rev
Log:
Delete unnecessarily cautious LastCALLSEQ code.

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

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp?rev=136156&r1=136155&r2=136156&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Tue Jul 26 17:00:59 2011
@@ -912,12 +912,7 @@
     case ISD::BR_JT:
     case ISD::BR_CC:
     case ISD::BRCOND:
-      assert(LastCALLSEQ.size() == 1 && "branch inside CALLSEQ_BEGIN/END?");
-      // Branches tweak the chain to include LastCALLSEQ
-      Ops[0] = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ops[0],
-                           getLastCALLSEQ());
       Ops[0] = LegalizeOp(Ops[0]);
-      setLastCALLSEQ(DAG.getEntryNode());
       break;
     case ISD::SHL:
     case ISD::SRL:
@@ -1021,14 +1016,6 @@
     // libcalls), create the new CALLSEQ_START node.
     Tmp1 = LegalizeOp(Node->getOperand(0));  // Legalize the chain.
 
-    // Merge in the last call to ensure that this call starts after the last
-    // call ended.
-    if (getLastCALLSEQ().getOpcode() != ISD::EntryToken) {
-      Tmp1 = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
-                         Tmp1, getLastCALLSEQ());
-      Tmp1 = LegalizeOp(Tmp1);
-    }
-
     // Do not try to legalize the target-specific arguments (#1+).
     if (Tmp1 != Node->getOperand(0)) {
       SmallVector<SDValue, 8> Ops(Node->op_begin(), Node->op_end());
@@ -1050,7 +1037,7 @@
     setLastCALLSEQ(SDValue(CallEnd, 0));
 
     // Legalize the call, starting from the CALLSEQ_END.
-    LegalizeOp(getLastCALLSEQ());
+    LegalizeOp(SDValue(CallEnd, 0));
     return Result;
   }
   case ISD::CALLSEQ_END: