[clang] b4243bb - [clang-format] Don't rewrite the input file if already formatted

[Owen Pan via cfe-commits]

Author: Owen Pan
Date: 2023-02-14T14:27:53-08:00
New Revision: b4243bb611a30137f3f1a7f0e531f91d331ab4be

URL: https://github.com/llvm/llvm-project/commit/b4243bb611a30137f3f1a7f0e531f91d331ab4be
DIFF: https://github.com/llvm/llvm-project/commit/b4243bb611a30137f3f1a7f0e531f91d331ab4be.diff

LOG: [clang-format] Don't rewrite the input file if already formatted

If IntegerLiteralSeparator is set but the integer literals are
already formatted, don't rewrite the input file.

Fixes #60651.

Differential Revision: https://reviews.llvm.org/D143831

Added: 
    

Modified: 
    clang/lib/Format/IntegerLiteralSeparatorFixer.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Format/IntegerLiteralSeparatorFixer.cpp b/clang/lib/Format/IntegerLiteralSeparatorFixer.cpp
index 24e758e986cf9..e5bee2e855bbc 100644
--- a/clang/lib/Format/IntegerLiteralSeparatorFixer.cpp
+++ b/clang/lib/Format/IntegerLiteralSeparatorFixer.cpp
@@ -132,8 +132,11 @@ IntegerLiteralSeparatorFixer::process(const Environment &Env,
       continue;
     if (Start > 0)
       Location = Location.getLocWithOffset(Start);
-    cantFail(Result.add(tooling::Replacement(SourceMgr, Location, Length,
-                                             format(Text, DigitsPerGroup))));
+    if (const auto &Formatted = format(Text, DigitsPerGroup);
+        Formatted != Text) {
+      cantFail(Result.add(
+          tooling::Replacement(SourceMgr, Location, Length, Formatted)));
+    }
   }
 
   return {Result, 0};