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-rw-r--r--llvm/lib/CodeGen/TargetPassConfig.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/TargetPassConfig.cpp b/llvm/lib/CodeGen/TargetPassConfig.cpp
index 856e120..6451194 100644
--- a/llvm/lib/CodeGen/TargetPassConfig.cpp
+++ b/llvm/lib/CodeGen/TargetPassConfig.cpp
@@ -1183,6 +1183,11 @@ void TargetPassConfig::addOptimizedRegAlloc() {
// LiveVariables can be removed completely, and LiveIntervals can be directly
// computed. (We still either need to regenerate kill flags after regalloc, or
// preferably fix the scavenger to not depend on them).
+ // FIXME: UnreachableMachineBlockElim is a dependant pass of LiveVariables.
+ // When LiveVariables is removed this has to be removed/moved either.
+ // Explicit addition of UnreachableMachineBlockElim allows stopping before or
+ // after it with -stop-before/-stop-after.
+ addPass(&UnreachableMachineBlockElimID, false);
addPass(&LiveVariablesID, false);
// Edge splitting is smarter with machine loop info.