When looking for anti-dependences on the critical path, don't bother
examining non-anti-dependence edges.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60496 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PostRASchedulerList.cpp b/lib/CodeGen/PostRASchedulerList.cpp
index bd97832..73caea9 100644
--- a/lib/CodeGen/PostRASchedulerList.cpp
+++ b/lib/CodeGen/PostRASchedulerList.cpp
@@ -195,6 +195,10 @@
SDep *Edge = CriticalPath[SU->NodeNum];
SUnit *NextSU = Edge->Dep;
unsigned AntiDepReg = Edge->Reg;
+ // Only consider anti-dependence edges.
+ if (!Edge->isAntiDep)
+ continue;
+ assert(AntiDepReg != 0 && "Anti-dependence on reg0?");
// Don't break anti-dependencies on non-allocatable registers.
if (!AllocatableSet.test(AntiDepReg))
continue;