[llvm] cdb5010 - DAG: Avoid more uses of getLibcallName (#170402)

[via llvm-commits]

Author: Matt Arsenault
Date: 2025-12-03T13:01:04-05:00
New Revision: cdb501064f35dbe5a1d49721daf59eca261057e9

URL: https://github.com/llvm/llvm-project/commit/cdb501064f35dbe5a1d49721daf59eca261057e9
DIFF: https://github.com/llvm/llvm-project/commit/cdb501064f35dbe5a1d49721daf59eca261057e9.diff

LOG: DAG: Avoid more uses of getLibcallName (#170402)

Added: 
    

Modified: 
    llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 70950084ee6b7..0e52f0516b09a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -4983,7 +4983,7 @@ static bool isDivRemLibcallAvailable(SDNode *Node, bool isSigned,
   case MVT::i128: LC= isSigned ? RTLIB::SDIVREM_I128:RTLIB::UDIVREM_I128; break;
   }
 
-  return TLI.getLibcallName(LC) != nullptr;
+  return TLI.getLibcallImpl(LC) != RTLIB::Unsupported;
 }
 
 /// Issue divrem if both quotient and remainder are needed.

diff  --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 3564cbebed5c2..0ba8816bf1e82 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -11121,7 +11121,8 @@ void TargetLowering::forceExpandWideMUL(SelectionDAG &DAG, const SDLoc &dl,
   else if (WideVT == MVT::i128)
     LC = RTLIB::MUL_I128;
 
-  if (LC == RTLIB::UNKNOWN_LIBCALL || !getLibcallName(LC)) {
+  RTLIB::LibcallImpl LibcallImpl = getLibcallImpl(LC);
+  if (LibcallImpl == RTLIB::Unsupported) {
     forceExpandMultiply(DAG, dl, Signed, Lo, Hi, LHS, RHS);
     return;
   }