[ARM] Push more complex check down to reduce compile time. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249547 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 2cc2108a6ffa0f5c8ffbc4de16bee760b03344e7..a0b482080c8a9796ee8b182fde3d01decec4e88a 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -9848,11 +9848,6 @@ static SDValue PerformVCVTCombine(SDNode *N, SelectionDAG &DAG,
   if (!isa<BuildVectorSDNode>(ConstVec))
     return SDValue();
 
-  uint64_t C;
-  bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
-  if (!isConstVecPow2(ConstVec, isSigned, C))
-    return SDValue();
-
   MVT FloatTy = Op.getSimpleValueType().getVectorElementType();
   uint32_t FloatBits = FloatTy.getSizeInBits();
   MVT IntTy = N->getSimpleValueType(0).getVectorElementType();
@@ -9866,6 +9861,11 @@ static SDValue PerformVCVTCombine(SDNode *N, SelectionDAG &DAG,
     return SDValue();
   }
 
+  uint64_t C;
+  bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
+  if (!isConstVecPow2(ConstVec, isSigned, C))
+    return SDValue();
+
   SDLoc dl(N);
   unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs :
     Intrinsic::arm_neon_vcvtfp2fxu;
@@ -9904,11 +9904,6 @@ static SDValue PerformVDIVCombine(SDNode *N, SelectionDAG &DAG,
   if (!isa<BuildVectorSDNode>(ConstVec))
     return SDValue();
 
-  uint64_t C;
-  bool isSigned = OpOpcode == ISD::SINT_TO_FP;
-  if (!isConstVecPow2(ConstVec, isSigned, C))
-    return SDValue();
-
   MVT FloatTy = N->getSimpleValueType(0).getVectorElementType();
   uint32_t FloatBits = FloatTy.getSizeInBits();
   MVT IntTy = Op.getOperand(0).getSimpleValueType().getVectorElementType();
@@ -9920,6 +9915,11 @@ static SDValue PerformVDIVCombine(SDNode *N, SelectionDAG &DAG,
     return SDValue();
   }
 
+  uint64_t C;
+  bool isSigned = OpOpcode == ISD::SINT_TO_FP;
+  if (!isConstVecPow2(ConstVec, isSigned, C))
+    return SDValue();
+
   SDLoc dl(N);
   SDValue ConvInput = Op.getOperand(0);
   unsigned NumLanes = Op.getValueType().getVectorNumElements();