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FastISel can only apend to basic blocks.

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Compute the insertion point from the end of the basic block instead of
skipping labels from the front.

This caused failures in landing pads when live-in copies where inserted
before instruction selection.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185616 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2013-07-04 04:32:39 +00:00
parent c982e14458
commit ef22e0e0b5
1 changed files with 5 additions and 8 deletions
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13
lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -76,15 +76,12 @@ STATISTIC(NumFastIselDead, "Number of dead insts removed on failure");
void FastISel::startNewBlock() {
LocalValueMap.clear();
// Instructions are append to FuncInfo.MBB. If the basic block already
// contains labels or copies, use the last instruction as the last local
// value.
EmitStartPt = 0;
// Advance the emit start point past any EH_LABEL instructions.
MachineBasicBlock::iterator
I = FuncInfo.MBB->begin(), E = FuncInfo.MBB->end();
while (I != E && I->getOpcode() == TargetOpcode::EH_LABEL) {
EmitStartPt = I;
++I;
}
if (!FuncInfo.MBB->empty())
EmitStartPt = &FuncInfo.MBB->back();
LastLocalValue = EmitStartPt;
}