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Clarify that CALLSEQ_START..END may not be nested,

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and add some protection against creating such.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47957 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2008-03-05 19:14:03 +00:00
parent 327d0651f8
commit 0ea0356dff
2 changed files with 8 additions and 0 deletions
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include/llvm/CodeGen/SelectionDAGNodes.h
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@ -529,6 +529,7 @@ namespace ISD {
// a call sequence, and carry arbitrary information that target might want
// to know. The first operand is a chain, the rest are specified by the
// target and not touched by the DAG optimizers.
// CALLSEQ_START..CALLSEQ_END pairs may not be nested.
CALLSEQ_START, // Beginning of a call sequence
CALLSEQ_END, // End of a call sequence