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| author | alex-t <alexander.timofeev@amd.com> | 2019-12-17 15:20:32 +0300 |
|---|---|---|
| committer | alex-t <alexander.timofeev@amd.com> | 2019-12-17 15:20:43 +0300 |
| commit | e7f585ed6109b1f20131b91af87e3c2ae1e59616 (patch) | |
| tree | ac796d09fb77ae2902dea8964faa99b09b34062a /llvm/lib/CodeGen/MachineSink.cpp | |
| parent | 3d3e4076cd65007007ca639d4f99c0fa671c9f8e (diff) | |
| download | bcm5719-llvm-e7f585ed6109b1f20131b91af87e3c2ae1e59616.tar.gz bcm5719-llvm-e7f585ed6109b1f20131b91af87e3c2ae1e59616.zip | |
PostRA Machine Sink should take care of COPY defining register that is a sub-register by another COPY source operand
Differential Revision: https://reviews.llvm.org/D71132
Diffstat (limited to 'llvm/lib/CodeGen/MachineSink.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineSink.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/MachineSink.cpp b/llvm/lib/CodeGen/MachineSink.cpp index 6900c195e0e..a4ba197b7a1 100644 --- a/llvm/lib/CodeGen/MachineSink.cpp +++ b/llvm/lib/CodeGen/MachineSink.cpp @@ -1215,10 +1215,14 @@ static void updateLiveIn(MachineInstr *MI, MachineBasicBlock *SuccBB, for (MCSubRegIterator S(DefReg, TRI, true); S.isValid(); ++S) SuccBB->removeLiveIn(*S); for (auto U : UsedOpsInCopy) { - Register Reg = MI->getOperand(U).getReg(); - if (!SuccBB->isLiveIn(Reg)) - SuccBB->addLiveIn(Reg); + Register SrcReg = MI->getOperand(U).getReg(); + LaneBitmask Mask; + for (MCRegUnitMaskIterator S(SrcReg, TRI); S.isValid(); ++S) { + Mask |= (*S).second; + } + SuccBB->addLiveIn(SrcReg, Mask.any() ? Mask : LaneBitmask::getAll()); } + SuccBB->sortUniqueLiveIns(); } static bool hasRegisterDependency(MachineInstr *MI, |
