BranchRelaxation: Recompute live-ins when splitting a block
Factors out and reuses live-in computation code from BranchFolding.
Differential Revision: https://reviews.llvm.org/D27558
llvm-svn: 290013
diff --git a/llvm/lib/CodeGen/MachineBasicBlock.cpp b/llvm/lib/CodeGen/MachineBasicBlock.cpp
index fe258cd..549424d 100644
--- a/llvm/lib/CodeGen/MachineBasicBlock.cpp
+++ b/llvm/lib/CodeGen/MachineBasicBlock.cpp
@@ -1288,3 +1288,7 @@
// care what kind of return it is, putting a mask after it is a no-op.
return isReturnBlock() && !succ_empty() ? TRI->getNoPreservedMask() : nullptr;
}
+
+void MachineBasicBlock::clearLiveIns() {
+ LiveIns.clear();
+}