Q.seenAllInterferences() must be called after Q.collectInterferingVRegs().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121774 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp
index 943da11..46cfbe7 100644
--- a/lib/CodeGen/RegAllocGreedy.cpp
+++ b/lib/CodeGen/RegAllocGreedy.cpp
@@ -175,9 +175,9 @@
// Check direct interferences.
LiveIntervalUnion::Query &Q = query(VirtReg, PhysReg);
if (Q.checkInterference()) {
+ Q.collectInterferingVRegs(1);
if (!Q.seenAllInterferences())
return 0;
- Q.collectInterferingVRegs(1);
Interference = Q.interferingVRegs().front();
}
@@ -185,9 +185,11 @@
for (const unsigned *AliasI = TRI->getAliasSet(PhysReg); *AliasI; ++AliasI) {
LiveIntervalUnion::Query &Q = query(VirtReg, *AliasI);
if (Q.checkInterference()) {
- if (Interference || !Q.seenAllInterferences())
+ if (Interference)
return 0;
Q.collectInterferingVRegs(1);
+ if (!Q.seenAllInterferences())
+ return 0;
Interference = Q.interferingVRegs().front();
}
}