[llvm] r351890 - [LegalizeTypes] Add debug prints to the top of PromoteFloatOperand and PromoteFloatResult.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Tue Jan 22 14:33:55 2019
New Revision: 351890

URL: http://llvm.org/viewvc/llvm-project?rev=351890&view=rev
Log:
[LegalizeTypes] Add debug prints to the top of PromoteFloatOperand and PromoteFloatResult.

Also add debug prints in the default case of the switches in these routines.

Most if not all of the type legalization handlers already do this so this makes promoting floats consistent

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp?rev=351890&r1=351889&r2=351890&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp Tue Jan 22 14:33:55 2019
@@ -1748,6 +1748,8 @@ static ISD::NodeType GetPromotionOpcode(
 }
 
 bool DAGTypeLegalizer::PromoteFloatOperand(SDNode *N, unsigned OpNo) {
+  LLVM_DEBUG(dbgs() << "Promote float operand " << OpNo << ": "; N->dump(&DAG);
+             dbgs() << "\n");
   SDValue R = SDValue();
 
   if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false)) {
@@ -1762,6 +1764,10 @@ bool DAGTypeLegalizer::PromoteFloatOpera
   // a part of PromoteFloatResult.
   switch (N->getOpcode()) {
     default:
+  #ifndef NDEBUG
+      dbgs() << "PromoteFloatOperand Op #" << OpNo << ": ";
+      N->dump(&DAG); dbgs() << "\n";
+  #endif
       llvm_unreachable("Do not know how to promote this operator's operand!");
 
     case ISD::BITCAST:    R = PromoteFloatOp_BITCAST(N, OpNo); break;
@@ -1872,6 +1878,8 @@ SDValue DAGTypeLegalizer::PromoteFloatOp
 //===----------------------------------------------------------------------===//
 
 void DAGTypeLegalizer::PromoteFloatResult(SDNode *N, unsigned ResNo) {
+  LLVM_DEBUG(dbgs() << "Promote float result " << ResNo << ": "; N->dump(&DAG);
+             dbgs() << "\n");
   SDValue R = SDValue();
 
   switch (N->getOpcode()) {
@@ -1880,6 +1888,10 @@ void DAGTypeLegalizer::PromoteFloatResul
     case ISD::FP16_TO_FP:
     case ISD::FP_TO_FP16:
     default:
+#ifndef NDEBUG
+      dbgs() << "PromoteFloatResult #" << ResNo << ": ";
+      N->dump(&DAG); dbgs() << "\n";
+#endif
       llvm_unreachable("Do not know how to promote this operator's result!");
 
     case ISD::BITCAST:    R = PromoteFloatRes_BITCAST(N); break;