[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

llvm-svn: 351890

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
index e5842d3faf0..17dee8d3ed4 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
@@ -1748,6 +1748,8 @@ static ISD::NodeType GetPromotionOpcode(EVT OpVT, EVT RetVT) {
 }
 
 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::PromoteFloatOperand(SDNode *N, unsigned OpNo) {
   // 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_STORE(SDNode *N, unsigned OpNo) {
 //===----------------------------------------------------------------------===//
 
 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::PromoteFloatResult(SDNode *N, unsigned ResNo) {
     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;