Re-apply my liveintervalanalysis changes. Now with PR1207 fixes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34428 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index bd44e81..3a1bfc2 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -292,8 +292,9 @@
}
// A brute force way of adding live-ins to every BB.
- for (MachineFunction::iterator MBB = mf_->begin(), E = mf_->end();
- MBB != E; ++MBB) {
+ MachineFunction::iterator MBB = mf_->begin();
+ ++MBB; // Skip entry MBB.
+ for (MachineFunction::iterator E = mf_->end(); MBB != E; ++MBB) {
unsigned StartIdx = li_->getMBBStartIdx(MBB->getNumber());
for (IntervalPtrs::iterator i = fixed_.begin(), e = fixed_.end();
i != e; ++i)