Revert "[clang-format] Emit absolute splits before lines for comments"

This reverts commit r311559, which added a test containing raw string
literals in macros, which chokes gcc:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55971

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@311566 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 10 deletions

diff --git a/lib/Format/BreakableToken.cpp b/lib/Format/BreakableToken.cpp
index b9e48e6301..20e3e5b1df 100644
--- a/lib/Format/BreakableToken.cpp
+++ b/lib/Format/BreakableToken.cpp
@@ -545,18 +545,15 @@ void BreakableBlockComment::insertBreak(unsigned LineIndex, unsigned TailOffset,
 }
 
 BreakableToken::Split BreakableBlockComment::getSplitBefore(
-    unsigned LineIndex, unsigned PreviousEndColumn, unsigned ColumnLimit,
+    unsigned LineIndex,
+    unsigned PreviousEndColumn,
+    unsigned ColumnLimit,
     llvm::Regex &CommentPragmasRegex) const {
   if (!mayReflow(LineIndex, CommentPragmasRegex))
     return Split(StringRef::npos, 0);
   StringRef TrimmedContent = Content[LineIndex].ltrim(Blanks);
-  Split Result = getReflowSplit(TrimmedContent, ReflowPrefix, PreviousEndColumn,
-                                ColumnLimit);
-  // Result is relative to TrimmedContent. Adapt it relative to
-  // Content[LineIndex].
-  if (Result.first != StringRef::npos)
-    Result.first += Content[LineIndex].size() - TrimmedContent.size();
-  return Result;
+  return getReflowSplit(TrimmedContent, ReflowPrefix, PreviousEndColumn,
+                        ColumnLimit);
 }
 
 unsigned BreakableBlockComment::getReflownColumn(
@@ -636,12 +633,17 @@ void BreakableBlockComment::replaceWhitespaceBefore(
         /*CurrentPrefix=*/ReflowPrefix, InPPDirective, /*Newlines=*/0,
         /*Spaces=*/0);
     // Check if we need to also insert a break at the whitespace range.
+    // For this we first adapt the reflow split relative to the beginning of the
+    // content.
     // Note that we don't need a penalty for this break, since it doesn't change
     // the total number of lines.
+    Split BreakSplit = SplitBefore;
+    BreakSplit.first += TrimmedContent.data() - Content[LineIndex].data();
     unsigned ReflownColumn =
         getReflownColumn(TrimmedContent, LineIndex, PreviousEndColumn);
-    if (ReflownColumn > ColumnLimit)
-      insertBreak(LineIndex, 0, SplitBefore, Whitespaces);
+    if (ReflownColumn > ColumnLimit) {
+      insertBreak(LineIndex, 0, BreakSplit, Whitespaces);
+    }
     return;
   }