diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/TargetLowering.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/TargetLowering.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp index ab4cd51553..134a859ceb 100644 --- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -2584,8 +2584,12 @@ bool TargetLowering::CheckTailCallReturnConstraints(CallSDNode *TheCall, // Check that operand of the RET node sources from the CALL node. The RET node // has at least two operands. Operand 0 holds the chain. Operand 1 holds the // value. + // Also we need to check that there is no code in between the call and the + // return. Hence we also check that the incomming chain to the return sources + // from the outgoing chain of the call. if (NumOps > 1 && - IgnoreHarmlessInstructions(Ret.getOperand(1)) == SDValue(TheCall,0)) + IgnoreHarmlessInstructions(Ret.getOperand(1)) == SDValue(TheCall,0) && + Ret.getOperand(0) == SDValue(TheCall, TheCall->getNumValues()-1)) return true; // void return: The RET node has the chain result value of the CALL node as // input. |