Revert patches 1.79 and 1.80 which had to do with dead MBB's. Now that they
don't exist, we don't have to pretend to handle them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14567 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index f687675..9c10805 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -356,7 +356,8 @@
}
// a variable can only be killed by subsequent instructions
- for (++mi; mi != e; ++mi) {
+ do {
+ ++mi;
baseIndex += InstrSlots::NUM;
for (KillIter ki = lv_->killed_begin(mi), ke = lv_->killed_end(mi);
ki != ke; ++ki) {
@@ -366,13 +367,10 @@
goto exit;
}
}
- }
+ } while (mi != e);
- // LiveVariables does not compute information for dead basic blocks.
- DEBUG(std::cerr << "Didn't find the end of the interval. Must be in a "
- "dead block.");
- end = getDefIndex(start)+1;
exit:
+ assert(start < end && "did not find end of interval?");
interval.addRange(start, end);
DEBUG(std::cerr << '\n');
}