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Author SHA1 Message Date
Benjamin Kramer 054faa5a48 Sema: Warn on sizeof on binary ops on decayed arrays. 
The array will decay into a pointer, creating an unexpected result.
sizeof(array + int) is an easy to make typo for sizeof(array) + int.

This was motivated by a NetBSD security bug, used sizeof(key - r) instead of
sizeof(key) - r, reducing entropy in a random number generator.
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/kern/subr_cprng.c.diff?r1=1.14&r2=1.15&only_with_tag=MAIN&f=h

Differential Revision: http://llvm-reviews.chandlerc.com/D571

llvm-svn: 178371
 2013-03-29 21:43:21 +00:00
Andy Gibbs c6e68daac0 Prior to adding the new "expected-no-diagnostics" directive to VerifyDiagnosticConsumer, make the necessary adjustment to 580 test-cases which will henceforth require this new directive. 
llvm-svn: 166280
 2012-10-19 12:44:48 +00:00
Peter Collingbourne 54f43b87dc Rename test/Sema/expr-comma-c89.c to expr-comma-c99.c. Spotted by 
Anton Lokhmotov.

llvm-svn: 126482
 2011-02-25 12:37:11 +00:00