Fix a compiler crash bootstrapping llvm-gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29989 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index a26feb3..0e9609c 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -570,7 +570,7 @@
else if (allocatableRegs_[reg]) {
handlePhysicalRegisterDef(MBB, MI, getOrCreateInterval(reg));
for (const unsigned* AS = mri_->getAliasSet(reg); *AS; ++AS)
- handlePhysicalRegisterDef(MBB, MI, getOrCreateInterval(*AS));
+ handlePhysicalRegisterDef(MBB, MI, getOrCreateInterval(*AS), true);
}
}
@@ -684,7 +684,11 @@
if (ValLR+1 != BLR) return false;
DEBUG(std::cerr << "\nExtending: "; IntB.print(std::cerr, mri_));
-
+
+ // We are about to delete CopyMI, so need to remove it as the 'instruction
+ // that defines this value #'.
+ IntB.setInstDefiningValNum(BValNo, ~0U);
+
// Okay, we can merge them. We need to insert a new liverange:
// [ValLR.end, BLR.begin) of either value number, then we merge the
// two value numbers.