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Fix indentation, add comment. 

llvm-svn: 122345
This commit is contained in:
Stuart Hastings 2010-12-21 17:16:58 +00:00
parent 3b8af41a3e
commit 83cce8e7ab
1 changed files with 6 additions and 4 deletions
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10
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -253,13 +253,15 @@ void SelectionDAGLegalize::LegalizeDAG() {
/// FindCallEndFromCallStart - Given a chained node that is part of a call /// FindCallEndFromCallStart - Given a chained node that is part of a call
/// sequence, find the CALLSEQ_END node that terminates the call sequence. /// sequence, find the CALLSEQ_END node that terminates the call sequence.
static SDNode *FindCallEndFromCallStart(SDNode *Node, int depth = 0) { static SDNode *FindCallEndFromCallStart(SDNode *Node, int depth = 0) {
// Nested CALLSEQ_START/END constructs aren't yet legal,
// but we can DTRT and handle them correctly here.
if (Node->getOpcode() == ISD::CALLSEQ_START) if (Node->getOpcode() == ISD::CALLSEQ_START)
depth++; depth++;
else if (Node->getOpcode() == ISD::CALLSEQ_END) { else if (Node->getOpcode() == ISD::CALLSEQ_END) {
depth--; depth--;
if (depth == 0) if (depth == 0)
return Node; return Node;
} }
if (Node->use_empty()) if (Node->use_empty())
return 0; // No CallSeqEnd return 0; // No CallSeqEnd