diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 82324cd5b9..fd9cf15443 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -1266,6 +1266,13 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) { // The only option for this is to custom lower it. Tmp3 = TLI.LowerOperation(Result.getValue(0), DAG); assert(Tmp3.Val && "Target didn't custom lower this node!"); + // A call within a calling sequence must be legalized to something + // other than the normal CALLSEQ_END. Violating this gets Legalize + // into an infinite loop. + assert ((!IsLegalizingCall || + Node->getOpcode() != ISD::CALL || + Tmp3.Val->getOpcode() != ISD::CALLSEQ_END) && + "Nested CALLSEQ_START..CALLSEQ_END not supported."); // The number of incoming and outgoing values should match; unless the final // outgoing value is a flag. |