[llvm] 709b7d1 - [X86] Pull out isFoldableAsShuffle lamdba as helper function. NFC. (#210354)

[via llvm-commits]

Author: Simon Pilgrim
Date: 2026-07-17T15:43:40Z
New Revision: 709b7d1bd4a71e484702d610f81b5cf84303386f

URL: https://github.com/llvm/llvm-project/commit/709b7d1bd4a71e484702d610f81b5cf84303386f
DIFF: https://github.com/llvm/llvm-project/commit/709b7d1bd4a71e484702d610f81b5cf84303386f.diff

LOG: [X86] Pull out isFoldableAsShuffle lamdba as helper function. NFC. (#210354)

For future reuse.

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86ISelLowering.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 97e783c09f0f2..f9ec233bd4431 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -8184,6 +8184,13 @@ static bool isFoldableUseOfShuffle(SDNode *N) {
   return false;
 }
 
+static bool isFoldableAsShuffle(SDValue V) {
+  while (V.getOpcode() == ISD::BITCAST ||
+         V.getOpcode() == ISD::EXTRACT_SUBVECTOR)
+    V = V.getOperand(0);
+  return isTargetShuffle(V.getOpcode());
+}
+
 // If the node has a single use by a VSELECT then AVX512 targets may be able to
 // fold as a predicated instruction.
 static bool isMaskableNode(SDValue V, const X86Subtarget &Subtarget) {
@@ -61511,13 +61518,6 @@ static SDValue combineINSERT_SUBVECTOR(SDNode *N, SelectionDAG &DAG,
     }
   }
 
-  auto isFoldableAsShuffle = [](SDValue V) {
-    while (V.getOpcode() == ISD::BITCAST ||
-           V.getOpcode() == ISD::EXTRACT_SUBVECTOR)
-      V = V.getOperand(0);
-    return isTargetShuffle(V.getOpcode());
-  };
-
   // Match concat_vector style patterns.
   SmallVector<SDValue, 2> SubVectorOps;
   if (collectConcatOps(N, SubVectorOps, DAG)) {