[llvm] [NFC][CostModel][X86] Fix "comparison of integers of different signs" (PR #124602)

[Vitaly Buka via llvm-commits]

https://github.com/vitalybuka created https://github.com/llvm/llvm-project/pull/124602

After #124412.


>From 8b87bd2ddacb1aaa5c79b976fb3302641ac7b66b Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka at google.com>
Date: Mon, 27 Jan 2025 10:05:20 -0800
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20initia?=
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Created using spr 1.3.4
---
 llvm/lib/Target/X86/X86TargetTransformInfo.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
index a64d65cb770b0f..82a112d50bc1a5 100644
--- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
+++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
@@ -55,6 +55,7 @@
 #include "llvm/CodeGen/TargetLowering.h"
 #include "llvm/IR/InstIterator.h"
 #include "llvm/IR/IntrinsicInst.h"
+#include <cstddef>
 #include <optional>
 
 using namespace llvm;
@@ -1580,9 +1581,10 @@ InstructionCost X86TTIImpl::getShuffleCost(
                ((P.value() % Mask.size()) / NumEltsPerLane) ==
                    (P.index() / NumEltsPerLane);
       });
-      IsSingleElementMask = (Mask.size() - 1) == count_if(Mask, [](int M) {
-                              return M == PoisonMaskElem;
-                            });
+      IsSingleElementMask =
+          (Mask.size() - 1) == static_cast<size_t>(count_if(Mask, [](int M) {
+            return M == PoisonMaskElem;
+          }));
     }
   }