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2011-06-15Sema: show shift result in hexadecimalTed Kremenek
Change the output for -Wshift-overflow and -Wshift-sign-overflow to an unsigned hexadecimal. It makes more sense for looking at bits than a signed decimal does. Also, change the diagnostic's wording from "overrides" to "sets". This uses a new optional argument in APInt::toString() that adds the '0x' prefix to hexademical numbers. This fixes PR 9651. Patch by nobled@dreamwidth.org! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133033 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-01Don't warning about shifting by too many bits in dead code.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126770 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-01Don't wanr about "negative shifts" in code that is unreachable. Fixes PR 5544.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126762 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-24Simplify messages as requested by Chris.Chandler Carruth
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126389 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-23Implement a warning for known shift overflows on constant shiftChandler Carruth
expressions. Consider the code: int64_t i = 10 << 30; This compiles fine, but most developers expect it to produce the value for 10 gigs, not -2 gigs. This is actually undefined behavior because the LHS is a signed integer type. The warning is currently gated behind -Wshift-overflow. There is a special case where only the sign bit is overridden that gets a custom error message and is by default ignored. This case is much less likely to cause observed buggy behavior, it's just undefined behavior according to the spec. This warning can be enabled with -Wshift-sign-overflow. Original patch by Oleg Slezberg, with style tweaks and some correctness fixes by me. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126342 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-16This really seems like a boring set of fixes to our tests to make them moreChandler Carruth
independent of the underlying system. Let me know if any of these are too aggressive. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119345 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-15Update tests to use %clang instead of 'clang', and forcibly disable use of 'Daniel Dunbar
clang ' or ' clang -cc1 ' or ' clang-cc ' in test lines (by substituting them to garbage). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91460 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-17Use clang to run tests which include headers from the system.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89085 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-08PR4700 - remove shift by 0 warningRyan Flynn
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@78488 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-07PR3333: warn when shifting by invalid amountRyan Flynn
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@78385 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-24Rename clang to clang-cc.Daniel Dunbar
Tests and drivers updated, still need to shuffle dirs. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67602 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-13Don't do integer promotions of LHS for compound shift assignment. The LHS ↵Chris Lattner
has to be a modifiable lvalue. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44993 91177308-0d34-0410-b5e6-96231b3b80d8
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