[llvm-commits] [llvm] r60652 - /llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp
Owen Anderson
resistor at mac.com
Sat Dec 6 21:33:20 PST 2008
Author: resistor
Date: Sat Dec 6 23:33:18 2008
New Revision: 60652
URL: http://llvm.org/viewvc/llvm-project?rev=60652&view=rev
Log:
Switch to top-down mode and fix a crasher this exposed caused by an error in the
live interval updating.
Modified:
llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp
Modified: llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp?rev=60652&r1=60651&r2=60652&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp (original)
+++ llvm/trunk/lib/CodeGen/PreAllocSplitting.cpp Sat Dec 6 23:33:18 2008
@@ -442,6 +442,9 @@
SE = MBB->succ_end(); SI != SE; ++SI)
WorkList.push_back(*SI);
+ SmallPtrSet<MachineBasicBlock*, 4> ProcessedBlocks;
+ ProcessedBlocks.insert(MBB);
+
while (!WorkList.empty()) {
MBB = WorkList.back();
WorkList.pop_back();
@@ -459,6 +462,13 @@
}
Processed.insert(LR);
}
+
+ ProcessedBlocks.insert(MBB);
+ if (LR)
+ for (MachineBasicBlock::succ_iterator SI = MBB->succ_begin(),
+ SE = MBB->succ_end(); SI != SE; ++SI)
+ if (!ProcessedBlocks.count(*SI))
+ WorkList.push_back(*SI);
}
for (LiveInterval::iterator I = CurrLI->begin(), E = CurrLI->end();
@@ -1039,7 +1049,7 @@
// Make sure blocks are numbered in order.
MF.RenumberBlocks();
-#if 0
+#if 1
// FIXME: Go top down.
MachineBasicBlock *Entry = MF.begin();
SmallPtrSet<MachineBasicBlock*,16> Visited;
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