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| author | Puyan Lotfi <puyan@puyan.org> | 2019-05-30 21:37:25 +0000 |
|---|---|---|
| committer | Puyan Lotfi <puyan@puyan.org> | 2019-05-30 21:37:25 +0000 |
| commit | daaecf98c9ac41d2ad1da5bbf53303c2167501b5 (patch) | |
| tree | 45261feb11cb150e54ab7c851d898cb0f5e670ac /llvm/lib | |
| parent | fc3dfd3e35a637cdbef1bc21c56a31c28e4a5b4c (diff) | |
| download | bcm5719-llvm-daaecf98c9ac41d2ad1da5bbf53303c2167501b5.tar.gz bcm5719-llvm-daaecf98c9ac41d2ad1da5bbf53303c2167501b5.zip | |
[MIR-Canon] Fixing case where MachineFunction is empty.
In cases where the machine function is empty: bail on the RPO traversal.
Differential Revision: https://reviews.llvm.org/D62617
llvm-svn: 362158
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/MIRCanonicalizerPass.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MIRCanonicalizerPass.cpp b/llvm/lib/CodeGen/MIRCanonicalizerPass.cpp index e8a6e409fb5..650240e60fe 100644 --- a/llvm/lib/CodeGen/MIRCanonicalizerPass.cpp +++ b/llvm/lib/CodeGen/MIRCanonicalizerPass.cpp @@ -104,6 +104,8 @@ INITIALIZE_PASS_END(MIRCanonicalizer, "mir-canonicalizer", "Rename Register Operands Canonically", false, false) static std::vector<MachineBasicBlock *> GetRPOList(MachineFunction &MF) { + if (MF.empty()) + return {}; ReversePostOrderTraversal<MachineBasicBlock *> RPOT(&*MF.begin()); std::vector<MachineBasicBlock *> RPOList; for (auto MBB : RPOT) { |
