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Fix a bug handling nodes with variable arguments. The code was fixed to assume

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that there were two input operands before the variable operand portion.  This
*happened* to be true for all call instructions, which took a chain and a
destination, but was not true for the PPC BCTRL instruction, whose destination
is implicit.

Making this code more general allows elimination of the custom selection logic
for BCTRL.

llvm-svn: 31732
This commit is contained in:
Chris Lattner 2006-11-14 18:41:38 +00:00
parent da103686a6
commit 796d72272b
1 changed files with 15 additions and 8 deletions
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23
utils/TableGen/DAGISelEmitter.cpp
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@ -2852,6 +2852,11 @@ public:
if (NodeHasOutFlag)
Code += ", MVT::Flag";
// Figure out how many fixed inputs the node has. This is important to
// know which inputs are the variable ones if present.
unsigned NumInputs = AllOps.size();
NumInputs += NodeHasChain;
// Inputs.
if (HasVarOps) {
for (unsigned i = 0, e = AllOps.size(); i != e; ++i)
@ -2860,15 +2865,17 @@ public:
}
if (HasVarOps) {
// Figure out whether any operands at the end of the op list are not
// part of the variable section.
std::string EndAdjust;
if (NodeHasInFlag || HasImpInputs)
emitCode("for (unsigned i = 2, e = N.getNumOperands()-1; "
"i != e; ++i) {");
else if (NodeHasOptInFlag)
emitCode("for (unsigned i = 2, e = N.getNumOperands()-"
"(HasInFlag?1:0); i != e; ++i) {");
else
emitCode("for (unsigned i = 2, e = N.getNumOperands(); "
"i != e; ++i) {");
EndAdjust = "-1"; // Always has one flag.
else if (NodeHasOptInFlag)
EndAdjust = "-(HasInFlag?1:0)"; // May have a flag.
emitCode("for (unsigned i = " + utostr(NumInputs) +
", e = N.getNumOperands()" + EndAdjust + "; i != e; ++i) {");
emitCode(" AddToISelQueue(N.getOperand(i));");
emitCode(" Ops" + utostr(OpsNo) + ".push_back(N.getOperand(i));");
emitCode("}");