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Attempt to make this debug output meaningful, both in the case of

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multibyte opcodes and in the case of multiple scopes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98036 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-03-09 02:15:05 +00:00
parent 1e233f510c
commit 19b3826d0f
1 changed files with 6 additions and 3 deletions
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9
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -2141,6 +2141,9 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
while (1) {
assert(MatcherIndex < TableSize && "Invalid index");
#ifndef NDEBUG
unsigned CurrentOpcodeIndex = MatcherIndex;
#endif
BuiltinOpcodes Opcode = (BuiltinOpcodes)MatcherTable[MatcherIndex++];
switch (Opcode) {
case OPC_Scope: {
@ -2666,6 +2669,7 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
// If the code reached this point, then the match failed. See if there is
// another child to try in the current 'Scope', otherwise pop it until we
// find a case to check.
DEBUG(errs() << " Match failed at index " << CurrentOpcodeIndex << "\n");
while (1) {
if (MatchScopes.empty()) {
CannotYetSelect(NodeToMatch);
@ -2680,13 +2684,12 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
NodeStack.append(LastScope.NodeStack.begin(), LastScope.NodeStack.end());
N = NodeStack.back();
DEBUG(errs() << " Match failed at index " << (MatcherIndex-1)
<< " continuing at " << LastScope.FailIndex << "\n");
if (LastScope.NumMatchedMemRefs != MatchedMemRefs.size())
MatchedMemRefs.resize(LastScope.NumMatchedMemRefs);
MatcherIndex = LastScope.FailIndex;
DEBUG(errs() << " Continuing at " << MatcherIndex << "\n");
InputChain = LastScope.InputChain;
InputFlag = LastScope.InputFlag;
if (!LastScope.HasChainNodesMatched)