[LegalizeTypes] Add debug prints to the top of PromoteFloatOperand and PromoteFloatRe...

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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351890 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
index e5842d3faf03f761bc21da59721f73ea4e997e68..17dee8d3ed47e6f4c18111fa2d232a0826802674 100644 (file)
--- a/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
+++ b/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;