From deaba3862fc76fe82fede028c7046136b94031f7 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Thu, 19 Oct 2017 01:32:18 +0000
Subject: Simplify.

llvm-svn: 316144
---
 llvm/lib/BinaryFormat/Magic.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/BinaryFormat/Magic.cpp')

diff --git a/llvm/lib/BinaryFormat/Magic.cpp b/llvm/lib/BinaryFormat/Magic.cpp
index db8e9526e64..42546eaa732 100644
--- a/llvm/lib/BinaryFormat/Magic.cpp
+++ b/llvm/lib/BinaryFormat/Magic.cpp
@@ -185,8 +185,8 @@ file_magic llvm::identify_magic(StringRef Magic) {
     if (startswith(Magic, "MZ") && Magic.size() >= 0x3c + 4) {
       uint32_t off = read32le(Magic.data() + 0x3c);
       // PE/COFF file, either EXE or DLL.
-      if (off + sizeof(COFF::PEMagic) <= Magic.size() &&
-          memcmp(Magic.data() + off, COFF::PEMagic, sizeof(COFF::PEMagic)) == 0)
+      if (Magic.substr(off).startswith(
+              StringRef(COFF::PEMagic, sizeof(COFF::PEMagic))))
         return file_magic::pecoff_executable;
     }
     break;
-- 
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