[llvm] [X86][CodeGen] Support folding memory broadcast in X86InstrInfo::foldMemoryOperandImpl (PR #79761)

[Simon Pilgrim via llvm-commits]

================
@@ -44,14 +44,20 @@ const X86FoldTableEntry *lookupTwoAddrFoldTable(unsigned RegOp);
 // operand OpNum.
 const X86FoldTableEntry *lookupFoldTable(unsigned RegOp, unsigned OpNum);
 
+// Look up the broadcast folding table entry for folding a broadcast with
+// operand OpNum.
+const X86FoldTableEntry *lookupBroadcastFoldTable(unsigned RegOp,
+                                                  unsigned OpNum);
+
 // Look up the memory unfolding table entry for this instruction.
 const X86FoldTableEntry *lookupUnfoldTable(unsigned MemOp);
 
 // Look up the broadcast folding table entry for this instruction from
 // the regular memory instruction.
-const X86FoldTableEntry *lookupBroadcastFoldTable(unsigned MemOp,
+const X86FoldTableEntry *lookupBroadcastFoldTableBySize(unsigned MemOp,
----------------
RKSimon wrote:

Maybe pull the lookupBroadcastFoldTable/lookupBroadcastFoldTableBySize change out in a separate NFC patch?

https://github.com/llvm/llvm-project/pull/79761