Fix printing of f16 machine operands

Only single and double FP immediates are correctly printed by
MachineInstr::print() during debug output. Half float type goes to
APFloat::convertToDouble() and hits assertion it is not a double
semantics. This diff prints half machine operands correctly.

This cannot currently be hit by any in-tree target.

Patch by Stanislav Mekhanoshin

llvm-svn: 259857

1 files changed, 8 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index e46a699e95b..1fee7989575 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -372,10 +372,16 @@ void MachineOperand::print(raw_ostream &OS, ModuleSlotTracker &MST,
     getCImm()->getValue().print(OS, false);
     break;
   case MachineOperand::MO_FPImmediate:
-    if (getFPImm()->getType()->isFloatTy())
+    if (getFPImm()->getType()->isFloatTy()) {
       OS << getFPImm()->getValueAPF().convertToFloat();
-    else
+    } else if (getFPImm()->getType()->isHalfTy()) {
+      APFloat APF = getFPImm()->getValueAPF();
+      bool Unused;
+      APF.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &Unused);
+      OS << "half " << APF.convertToFloat();
+    } else {
       OS << getFPImm()->getValueAPF().convertToDouble();
+    }
     break;
   case MachineOperand::MO_MachineBasicBlock:
     OS << "<BB#" << getMBB()->getNumber() << ">";