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Fix a tblgen problem handling variable_ops in tblgen instruction

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definitions. This adds a new construct, "discard", for indicating
that a named node in the input matching pattern is to be discarded,
instead of corresponding to a node in the output pattern. This
allows tblgen to know where the arguments for the varaible_ops are
supposed to begin.

This fixes "rdar://5791600", whatever that is ;-).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51699 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-05-29 19:57:41 +00:00
parent b99e2e20b2
commit d35121ad00
8 changed files with 54 additions and 52 deletions
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2
utils/TableGen/CodeGenDAGPatterns.cpp
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@@ -916,6 +916,8 @@ bool TreePatternNode::ApplyTypeConstraints(TreePattern &TP, bool NotRegisters) {
MadeChange |= Child->UpdateNodeType(MVT::iPTR, TP);
} else if (OperandNode->getName() == "unknown") {
MadeChange |= Child->UpdateNodeType(MVT::isUnknown, TP);
} else if (OperandNode->getName() == "discard") {
MadeChange |= Child->UpdateNodeType(MVT::isUnknown, TP);
} else {
assert(0 && "Unknown operand type!");
abort();