1 files changed, 16 insertions, 19 deletions
diff --git a/contrib/llvm/lib/TableGen/TableGenBackend.cpp b/contrib/llvm/lib/TableGen/TableGenBackend.cpp
index 79d567753a6c..77ed8414b15f 100644
--- a/contrib/llvm/lib/TableGen/TableGenBackend.cpp
+++ b/contrib/llvm/lib/TableGen/TableGenBackend.cpp
@@ -11,10 +11,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/TableGen/TableGenBackend.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/TableGen/TableGenBackend.h"
-#include <algorithm>
 
 using namespace llvm;
 
@@ -23,32 +22,30 @@ const size_t MAX_LINE_LEN = 80U;
 static void printLine(raw_ostream &OS, const Twine &Prefix, char Fill,
                       StringRef Suffix) {
   size_t Pos = (size_t)OS.tell();
-  assert((MAX_LINE_LEN - Prefix.str().size() - Suffix.size() > 0) &&
-    "header line exceeds max limit");
+  assert((Prefix.str().size() + Suffix.size() <= MAX_LINE_LEN) &&
+         "header line exceeds max limit");
   OS << Prefix;
-  const size_t e = MAX_LINE_LEN - Suffix.size();
-  for (size_t i = (size_t)OS.tell() - Pos; i < e; ++i)
+  for (size_t i = (size_t)OS.tell() - Pos, e = MAX_LINE_LEN - Suffix.size();
+         i < e; ++i)
     OS << Fill;
   OS << Suffix << '\n';
 }
 
 void llvm::emitSourceFileHeader(StringRef Desc, raw_ostream &OS) {
   printLine(OS, "/*===- TableGen'erated file ", '-', "*- C++ -*-===*\\");
-  printLine(OS, "|*", ' ', "*|");
-  size_t Pos = 0U;
-  size_t PosE;
-  StringRef Prefix("|*");
+  StringRef Prefix("|* ");
   StringRef Suffix(" *|");
-  do{
-    size_t PSLen = Suffix.size() + Prefix.size();
-    PosE = Pos + ((MAX_LINE_LEN > (Desc.size() - PSLen)) ?
-      Desc.size() :
-      MAX_LINE_LEN - PSLen);
-    printLine(OS, Prefix + Desc.slice(Pos, PosE), ' ', Suffix);
-    Pos = PosE;
-  } while(Pos < Desc.size());
   printLine(OS, Prefix, ' ', Suffix);
-  printLine(OS, Prefix + " Automatically generated file, do not edit!", ' ',
+  size_t PSLen = Prefix.size() + Suffix.size();
+  assert(PSLen < MAX_LINE_LEN);
+  size_t Pos = 0U;
+  do {
+    size_t Length = std::min(Desc.size() - Pos, MAX_LINE_LEN - PSLen);
+    printLine(OS, Prefix + Desc.substr(Pos, Length), ' ', Suffix);
+    Pos += Length;
+  } while (Pos < Desc.size());
+  printLine(OS, Prefix, ' ', Suffix);
+  printLine(OS, Prefix + "Automatically generated file, do not edit!", ' ',
     Suffix);
   printLine(OS, Prefix, ' ', Suffix);
   printLine(OS, "\\*===", '-', "===*/");