[ARM GlobalISel] Map DBG_VALUE for types != s32

...and make sure we fail elegantly for unsupported values.

s64 goes into DPR, anything <= 32 into GPR.

llvm-svn: 360321

1 files changed, 8 insertions, 2 deletions

diff --git a/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp b/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp
index 021c13115e3..d03b482043e 100644
--- a/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMRegisterBankInfo.cpp
@@ -433,8 +433,14 @@ ARMRegisterBankInfo::getInstrMapping(const MachineInstr &MI) const {
     break;
   case DBG_VALUE: {
     SmallVector<const ValueMapping *, 4> OperandBanks(NumOperands);
-    if (MI.getOperand(0).isReg() && MI.getOperand(0).getReg())
-      OperandBanks[0] = &ARM::ValueMappings[ARM::GPR3OpsIdx];
+    const MachineOperand &MaybeReg = MI.getOperand(0);
+    if (MaybeReg.isReg() && MaybeReg.getReg()) {
+      unsigned Size = MRI.getType(MaybeReg.getReg()).getSizeInBits();
+      if (Size > 32 && Size != 64)
+        return getInvalidInstructionMapping();
+      OperandBanks[0] = Size == 64 ? &ARM::ValueMappings[ARM::DPR3OpsIdx]
+                                   : &ARM::ValueMappings[ARM::GPR3OpsIdx];
+    }
     OperandsMapping = getOperandsMapping(OperandBanks);
     break;
   }