When looking for anti-dependences on the critical path, don't bother
examining non-anti-dependence edges.
llvm-svn: 60496
diff --git a/llvm/lib/CodeGen/PostRASchedulerList.cpp b/llvm/lib/CodeGen/PostRASchedulerList.cpp
index bd97832..73caea9 100644
--- a/llvm/lib/CodeGen/PostRASchedulerList.cpp
+++ b/llvm/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;