Skip to content

[FormattedStream] Add ASCII fast path #117892

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Dec 2, 2024
Merged

[FormattedStream] Add ASCII fast path #117892

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 7 additions & 0 deletions llvm/lib/Support/FormattedStream.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,6 +75,13 @@ void formatted_raw_ostream::UpdatePosition(const char *Ptr, size_t Size) {
// Now scan the rest of the buffer.
unsigned NumBytes;
for (const char *End = Ptr + Size; Ptr < End; Ptr += NumBytes) {
// Fast path for printable ASCII characters without special handling.
if (*Ptr >= 0x20 && *Ptr <= 0x7e) {
NumBytes = 1;
++Column;
continue;
}

NumBytes = getNumBytesForUTF8(*Ptr);

// The buffer might end part way through a UTF-8 code unit sequence for a
Expand Down