[x86] move combiner state check into convertIntLogicToFPLogic(); NFC

This function can be adapted to solve bugs like PR51245,
but it could require differentiating the combiner timing
between the existing and new transforms.

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index c79ff5b..95c80e5 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -45453,6 +45453,7 @@ static unsigned convertIntLogicToFPLogicOpcode(unsigned Opcode) {
 /// types, try to convert this into a floating point logic node to avoid
 /// unnecessary moves from SSE to integer registers.
 static SDValue convertIntLogicToFPLogic(SDNode *N, SelectionDAG &DAG,
+                                        TargetLowering::DAGCombinerInfo &DCI,
                                         const X86Subtarget &Subtarget) {
   EVT VT = N->getValueType(0);
   SDValue N0 = N->getOperand(0);
@@ -45462,6 +45463,9 @@ static SDValue convertIntLogicToFPLogic(SDNode *N, SelectionDAG &DAG,
   if (N0.getOpcode() != ISD::BITCAST || N1.getOpcode() != ISD::BITCAST)
     return SDValue();
 
+  if (DCI.isBeforeLegalizeOps())
+    return SDValue();
+
   SDValue N00 = N0.getOperand(0);
   SDValue N10 = N1.getOperand(0);
   EVT N00Type = N00.getValueType();
@@ -45787,15 +45791,15 @@ static SDValue combineAnd(SDNode *N, SelectionDAG &DAG,
   if (SDValue R = combineBitOpWithMOVMSK(N, DAG))
     return R;
 
+  if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, DCI, Subtarget))
+    return FPLogic;
+
   if (DCI.isBeforeLegalizeOps())
     return SDValue();
 
   if (SDValue R = combineCompareEqual(N, DAG, DCI, Subtarget))
     return R;
 
-  if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, Subtarget))
-    return FPLogic;
-
   if (SDValue R = combineANDXORWithAllOnesIntoANDNP(N, DAG))
     return R;
 
@@ -46153,15 +46157,15 @@ static SDValue combineOr(SDNode *N, SelectionDAG &DAG,
   if (SDValue R = combineBitOpWithMOVMSK(N, DAG))
     return R;
 
+  if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, DCI, Subtarget))
+    return FPLogic;
+
   if (DCI.isBeforeLegalizeOps())
     return SDValue();
 
   if (SDValue R = combineCompareEqual(N, DAG, DCI, Subtarget))
     return R;
 
-  if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, Subtarget))
-    return FPLogic;
-
   if (SDValue R = canonicalizeBitSelect(N, DAG, Subtarget))
     return R;
 
@@ -48564,6 +48568,9 @@ static SDValue combineXor(SDNode *N, SelectionDAG &DAG,
   if (SDValue R = combineBitOpWithMOVMSK(N, DAG))
     return R;
 
+  if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, DCI, Subtarget))
+    return FPLogic;
+
   if (DCI.isBeforeLegalizeOps())
     return SDValue();
 
@@ -48612,9 +48619,6 @@ static SDValue combineXor(SDNode *N, SelectionDAG &DAG,
     }
   }
 
-  if (SDValue FPLogic = convertIntLogicToFPLogic(N, DAG, Subtarget))
-    return FPLogic;
-
   return combineFneg(N, DAG, DCI, Subtarget);
 }