[LLVMbugs] [Bug 13276] New: Spurious errors for Objective-C string comparison
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Thu Jul 5 04:58:44 PDT 2012
http://llvm.org/bugs/show_bug.cgi?id=13276
Bug #: 13276
Summary: Spurious errors for Objective-C string comparison
Product: clang
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
AssignedTo: unassignedclangbugs at nondot.org
ReportedBy: csdavec at swan.ac.uk
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
Clang now errors on attempts to compare Objective-C string literals. This
causes a lot of problems because this is a very common pattern, where you first
test for pointer equality in the caller and then call -isEqual: if the pointer
comparison fails. A very common case of this is when comparing against
specific keys, but lots of macros also include an == nil guard clause which now
generates an error, when previously it generated valid code (which the
optimiser removed).
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