From fe00f1659bfcd6b5bf42f20760d8f64ab47db3cb Mon Sep 17 00:00:00 2001
From: Ben Barham <ben_barham@apple.com>
Date: Fri, 6 Sep 2024 16:23:53 -0700
Subject: [PATCH] [Support] Include `intrin.h` for MSVC intrinsics in
 `xxhash.cpp`

`__umulh` added in https://github.com/llvm/llvm-project/pull/95863
requires `intrin.h`, make sure to include it.
---
 llvm/lib/Support/xxhash.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvm/lib/Support/xxhash.cpp b/llvm/lib/Support/xxhash.cpp
index cdb76d57e2c1d..81e1bff426b3e 100644
--- a/llvm/lib/Support/xxhash.cpp
+++ b/llvm/lib/Support/xxhash.cpp
@@ -60,6 +60,10 @@
 #include <arm_neon.h>
 #endif
 
+#if defined(_MSC_VER)
+#include <intrin.h>
+#endif
+
 using namespace llvm;
 using namespace support;