[llvm-branch-commits] [llvm] c4e327a - Remove memory allocation with string

[Aditya Kumar via llvm-branch-commits]

Author: Aditya Kumar
Date: 2020-12-05T15:14:44-08:00
New Revision: c4e327a960d20e18f3a8116da51a5686c628d51b

URL: https://github.com/llvm/llvm-project/commit/c4e327a960d20e18f3a8116da51a5686c628d51b
DIFF: https://github.com/llvm/llvm-project/commit/c4e327a960d20e18f3a8116da51a5686c628d51b.diff

LOG: Remove memory allocation with string

Differential Revision: https://reviews.llvm.org/D92506

Added: 
    

Modified: 
    llvm/lib/Option/OptTable.cpp

Removed: 
    


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diff  --git a/llvm/lib/Option/OptTable.cpp b/llvm/lib/Option/OptTable.cpp
index 304c09fff9d2..9564b4433f0c 100644
--- a/llvm/lib/Option/OptTable.cpp
+++ b/llvm/lib/Option/OptTable.cpp
@@ -196,11 +196,13 @@ static unsigned matchOption(const OptTable::Info *I, StringRef Str,
 
 // Returns true if one of the Prefixes + In.Names matches Option
 static bool optionMatches(const OptTable::Info &In, StringRef Option) {
-  if (In.Prefixes)
+  if (In.Prefixes) {
+    StringRef InName(In.Name);
     for (size_t I = 0; In.Prefixes[I]; I++)
-      if (Option.endswith(In.Name))
-        if (Option == std::string(In.Prefixes[I]) + In.Name)
+      if (Option.endswith(InName))
+        if (Option.slice(0, Option.size() - InName.size()) == In.Prefixes[I])
           return true;
+  }
   return false;
 }