diff options
| -rw-r--r-- | llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp index f5c9370805f..f417193fdeb 100644 --- a/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp +++ b/llvm/lib/CodeGen/GlobalISel/RegBankSelect.cpp @@ -45,7 +45,14 @@ bool RegBankSelect::assignmentMatch( if (ValMapping.BreakDown.size() > 1) return false; - return RBI->getRegBank(Reg, *MRI, *TRI) == ValMapping.BreakDown[0].RegBank; + const RegisterBank *CurRegBank = RBI->getRegBank(Reg, *MRI, *TRI); + const RegisterBank *DesiredRegBrank = ValMapping.BreakDown[0].RegBank; + DEBUG(dbgs() << "Does assignment already match: "; + if (CurRegBank) dbgs() << *CurRegBank; else dbgs() << "none"; + dbgs() << " against "; + assert(DesiredRegBrank && "The mapping must be valid"); + dbgs() << *DesiredRegBrank << '\n';); + return CurRegBank == DesiredRegBrank; } unsigned @@ -116,6 +123,8 @@ void RegBankSelect::assignInstr(MachineInstr &MI) { // If that is not the case, this means the code was broken before // hands because we should have found that the assignment match. // This will not hold when we will consider alternative mappings. + DEBUG(dbgs() << "Assign: " << *ValMapping.BreakDown[0].RegBank << " to " + << PrintReg(Reg) << '\n'); MRI->setRegBank(Reg, *ValMapping.BreakDown[0].RegBank); MO.setReg(Reg); } |
