move fold comments to the corresponding fold; NFC

llvm-svn: 228317

1 files changed, 9 insertions, 3 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index eff03f030c5..7f0718b2708 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -25449,11 +25449,13 @@ static SDValue PerformFSUBCombine(SDNode *N, SelectionDAG &DAG,
 /// Do target-specific dag combines on X86ISD::FOR and X86ISD::FXOR nodes.
 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
   assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
+
   // F[X]OR(0.0, x) -> x
-  // F[X]OR(x, 0.0) -> x
   if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
     if (C->getValueAPF().isPosZero())
       return N->getOperand(1);
+
+  // F[X]OR(x, 0.0) -> x
   if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
     if (C->getValueAPF().isPosZero())
       return N->getOperand(0);
@@ -25484,26 +25486,30 @@ static SDValue PerformFMinFMaxCombine(SDNode *N, SelectionDAG &DAG) {
 /// Do target-specific dag combines on X86ISD::FAND nodes.
 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
   // FAND(0.0, x) -> 0.0
-  // FAND(x, 0.0) -> 0.0
   if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
     if (C->getValueAPF().isPosZero())
       return N->getOperand(0);
+
+  // FAND(x, 0.0) -> 0.0
   if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
     if (C->getValueAPF().isPosZero())
       return N->getOperand(1);
+  
   return SDValue();
 }
 
 /// Do target-specific dag combines on X86ISD::FANDN nodes
 static SDValue PerformFANDNCombine(SDNode *N, SelectionDAG &DAG) {
-  // FANDN(x, 0.0) -> 0.0
   // FANDN(0.0, x) -> x
   if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
     if (C->getValueAPF().isPosZero())
       return N->getOperand(1);
+
+  // FANDN(x, 0.0) -> 0.0
   if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
     if (C->getValueAPF().isPosZero())
       return N->getOperand(1);
+
   return SDValue();
 }