diff options
author | David Callahan <dcallahan@fb.com> | 2016-10-05 21:36:16 +0000 |
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committer | David Callahan <dcallahan@fb.com> | 2016-10-05 21:36:16 +0000 |
commit | 8be61a8c7e1f0d0c7ac30e1457a36af5a01fcaf7 (patch) | |
tree | c2cb50587ef02f1e416ae6aea50e29fac1f5b72b /lib/CodeGen/LiveVariables.cpp | |
parent | 5ea3570b6a160837d0c1456c2efc7fbe72af7591 (diff) |
Modify df_iterator to support post-order actions
Summary: This makes a change to the state used to maintain visited information for depth first iterator. We know assume a method "completed(...)" which is called after all children of a node have been visited. In all existing cases, this method does nothing so this patch has no functional changes. It will however allow a client to distinguish back from cross edges in a DFS tree.
Reviewers: nadav, mehdi_amini, dberlin
Subscribers: MatzeB, mzolotukhin, twoh, freik, llvm-commits
Differential Revision: https://reviews.llvm.org/D25191
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283391 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveVariables.cpp')
-rw-r--r-- | lib/CodeGen/LiveVariables.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp index dd87216f5e6..269b990a314 100644 --- a/lib/CodeGen/LiveVariables.cpp +++ b/lib/CodeGen/LiveVariables.cpp @@ -643,7 +643,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &mf) { // register before its uses due to dominance properties of SSA (except for PHI // nodes, which are treated as a special case). MachineBasicBlock *Entry = &MF->front(); - SmallPtrSet<MachineBasicBlock*,16> Visited; + df_iterator_default_set<MachineBasicBlock*,16> Visited; for (MachineBasicBlock *MBB : depth_first_ext(Entry, Visited)) { runOnBlock(MBB, NumRegs); |