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Major improvement to how nodes are built for a BB.

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LLVM instruction is no longer recorded in each node, but BB is.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1262 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve
2001-11-12 14:18:01 +00:00
parent 5567e942c0
commit af00d485a4
8 changed files with 150 additions and 74 deletions
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lib/CodeGen/InstrSched/InstrScheduling.cpp
+9 -15
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@@ -1235,33 +1235,27 @@ ReplaceNopsWithUsefulInstr(SchedulingManager& S,
// If not enough useful instructions were found, use the NOPs to
// fill delay slots, otherwise, just discard them.
//
MachineCodeForVMInstr& termMvec = node->getInstr()->getMachineInstrVec();
unsigned int firstDelaySlotIdx;
for (unsigned i=0; i < termMvec.size(); ++i)
if (termMvec[i] == brInstr)
{
firstDelaySlotIdx = i+1;
break;
}
assert(firstDelaySlotIdx <= termMvec.size()-1 &&
"This sucks! Where's that delay slot instruction?");
unsigned int firstDelaySlotIdx = node->getOrigIndexInBB() + 1;
MachineCodeForBasicBlock& bbMvec = node->getBB()->getMachineInstrVec();
assert(bbMvec[firstDelaySlotIdx - 1] == brInstr &&
"Incorrect instr. index in basic block for brInstr");
// First find all useful instructions already in the delay slots
// and USE THEM. We'll throw away the unused alternatives below
//
for (unsigned i=firstDelaySlotIdx; i < firstDelaySlotIdx + ndelays; ++i)
if (! mii.isNop(termMvec[i]->getOpCode()))
if (! mii.isNop(bbMvec[i]->getOpCode()))
sdelayNodeVec.insert(sdelayNodeVec.begin(),
graph->getGraphNodeForInstr(termMvec[i]));
graph->getGraphNodeForInstr(bbMvec[i]));
// Then find the NOPs and keep only as many as are needed.
// Put the rest in nopNodeVec to be deleted.
for (unsigned i=firstDelaySlotIdx; i < firstDelaySlotIdx + ndelays; ++i)
if (mii.isNop(termMvec[i]->getOpCode()))
if (mii.isNop(bbMvec[i]->getOpCode()))
if (sdelayNodeVec.size() < ndelays)
sdelayNodeVec.push_back(graph->getGraphNodeForInstr(termMvec[i]));
sdelayNodeVec.push_back(graph->getGraphNodeForInstr(bbMvec[i]));
else
nopNodeVec.push_back(graph->getGraphNodeForInstr(termMvec[i]));
nopNodeVec.push_back(graph->getGraphNodeForInstr(bbMvec[i]));
assert(sdelayNodeVec.size() >= ndelays);