[llvm] ad0d3bb - [Dominators] Facilitate updates to MachinePostDominatorTree

[Carl Ritson via llvm-commits]

Author: Carl Ritson
Date: 2020-04-19T10:04:35+09:00
New Revision: ad0d3bbb279b0310a9e53cfc0c162f21333fc098

URL: https://github.com/llvm/llvm-project/commit/ad0d3bbb279b0310a9e53cfc0c162f21333fc098
DIFF: https://github.com/llvm/llvm-project/commit/ad0d3bbb279b0310a9e53cfc0c162f21333fc098.diff

LOG: [Dominators] Facilitate updates to MachinePostDominatorTree

Summary:
Add getBase accessor so that underlying tree can be
manipulated in a similar manner to MachineDominatorTree.

Reviewers: kuhar, arsenm, hliao, nhaehnle

Reviewed By: kuhar

Subscribers: lkail, mgorny, hiraditya, wdng, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77967

Added: 
    

Modified: 
    llvm/include/llvm/CodeGen/MachinePostDominators.h

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/CodeGen/MachinePostDominators.h b/llvm/include/llvm/CodeGen/MachinePostDominators.h
index cb258b5e7b21..597bb401a7fa 100644
--- a/llvm/include/llvm/CodeGen/MachinePostDominators.h
+++ b/llvm/include/llvm/CodeGen/MachinePostDominators.h
@@ -33,6 +33,12 @@ class MachinePostDominatorTree : public MachineFunctionPass {
 
   MachinePostDominatorTree();
 
+  PostDomTreeT &getBase() {
+    if (!PDT)
+      PDT.reset(new PostDomTreeT());
+    return *PDT;
+  }
+
   FunctionPass *createMachinePostDominatorTreePass();
 
   const SmallVectorImpl<MachineBasicBlock *> &getRoots() const {