From: Jakub Staszak <kubastaszak@gmail.com>
Date: Mon, 4 Nov 2013 19:22:50 +0000 (+0000)
Subject: Use startswith_lower() where possible.
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=42f2a6b41ea62d4ccd10a6c469b27549881a7406

Use startswith_lower() where possible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194007 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Option/OptTable.cpp b/lib/Option/OptTable.cpp
index 78c5ea2c441..6fa459a0066 100644
--- a/lib/Option/OptTable.cpp
+++ b/lib/Option/OptTable.cpp
@@ -175,13 +175,6 @@ static bool isInput(const llvm::StringSet<> &Prefixes, StringRef Arg) {
   return true;
 }
 
-// Returns true if X starts with Y, ignoring case.
-static bool startsWithIgnoreCase(StringRef X, StringRef Y) {
-  if (X.size() < Y.size())
-    return false;
-  return X.substr(0, Y.size()).equals_lower(Y);
-}
-
 /// \returns Matched size. 0 means no match.
 static unsigned matchOption(const OptTable::Info *I, StringRef Str,
                             bool IgnoreCase) {
@@ -190,7 +183,7 @@ static unsigned matchOption(const OptTable::Info *I, StringRef Str,
     if (Str.startswith(Prefix)) {
       StringRef Rest = Str.substr(Prefix.size());
       bool Matched = IgnoreCase
-          ? startsWithIgnoreCase(Rest, I->Name)
+          ? Rest.startswith_lower(I->Name)
           : Rest.startswith(I->Name);
       if (Matched)
         return Prefix.size() + StringRef(I->Name).size();
diff --git a/tools/bugpoint/ToolRunner.cpp b/tools/bugpoint/ToolRunner.cpp
index 107d0dbaeb1..254d9972338 100644
--- a/tools/bugpoint/ToolRunner.cpp
+++ b/tools/bugpoint/ToolRunner.cpp
@@ -662,7 +662,7 @@ static bool IsARMArchitecture(std::vector<const char*> Args) {
          I = Args.begin(), E = Args.end(); I != E; ++I) {
     if (StringRef(*I).equals_lower("-arch")) {
       ++I;
-      if (I != E && StringRef(*I).substr(0, strlen("arm")).equals_lower("arm"))
+      if (I != E && StringRef(*I).startswith_lower("arm"))
         return true;
     }
   }