Commit Graph

4 Commits

Author SHA1 Message Date
Artem Dergachev 4eca0de7b7 [analyzer] Re-apply r283094 "Improve CloneChecker diagnostics"
The parent commit (r283092) was reverted before and now finally landed.

llvm-svn: 283661
2016-10-08 10:54:30 +00:00
Vitaly Buka 1a8d52d1ae Revert "[analyzer] Improve CloneChecker diagnostics" as its depends on reverted r283092
This reverts commit r283094.

llvm-svn: 283182
2016-10-04 02:40:35 +00:00
Artem Dergachev c87d2a613e [analyzer] Improve CloneChecker diagnostics
Highlight code clones referenced by the warning message with the help of
the extra notes feature recently introduced in r283092.

Change warning text to more clang-ish. Remove suggestions from the copy-paste
error checker diagnostics, because currently our suggestions are strictly 50%
wrong (we do not know which of the two code clones contains the error), and
for that reason we should not sound as if we're actually suggesting this.
Hopefully a better solution would bring them back.

Make sure the suspicious clone pair structure always mentions
the correct variable for the second clone.

Differential Revision: https://reviews.llvm.org/D24916

llvm-svn: 283094
2016-10-03 08:11:50 +00:00
Artem Dergachev 2fc1985db3 [analyzer] Teach CloneDetector to find clones that look like copy-paste errors.
The original clone checker tries to find copy-pasted code that is exactly
identical to the original code, up to minor details.

As an example, if the copy-pasted code has all references to variable 'a'
replaced with references to variable 'b', it is still considered to be
an exact clone.

The new check finds copy-pasted code in which exactly one variable seems
out of place compared to the original code, which likely indicates
a copy-paste error (a variable was forgotten to be renamed in one place).

Patch by Raphael Isemann!

Differential Revision: https://reviews.llvm.org/D23314

llvm-svn: 279056
2016-08-18 12:29:41 +00:00