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In C, comparisons between signed and unsigned numbers are always done in
unsigned-space. Thus, we should know that "i >= 0U" is always true, even
if 'i' is signed. Similarly, "u >= 0" is also always true, even though '0'
is signed.
Part of <rdar://problem/13239003> (false positives related to std::vector)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177806 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156920 91177308-0d34-0410-b5e6-96231b3b80d8
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This involves keeping track of three separate types: the symbol type, the
adjustment type, and the comparison type. For example, in "$x + 5 > 0ULL",
if the type of $x is 'signed char', the adjustment type is 'int' and the
comparison type is 'unsigned long long'. Most of the time these three types
will be the same, but we should still do the right thing when the
comparison value is out of range, and wraparound should be calculated in
the adjustment type.
This also re-disables an out-of-bounds test; we were extracting the symbol
from non-additive SymIntExprs, but then throwing away the integer.
Sorry for the large patch; both the basic and range constraint managers needed
to be updated together, since they share code in SimpleConstraintManager.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156361 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156061 91177308-0d34-0410-b5e6-96231b3b80d8
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be the common root package.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136835 91177308-0d34-0410-b5e6-96231b3b80d8
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misnomer award.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126676 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126607 91177308-0d34-0410-b5e6-96231b3b80d8
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The constant was copied from clang's limits.h.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106732 91177308-0d34-0410-b5e6-96231b3b80d8
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fails on linux.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106661 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106639 91177308-0d34-0410-b5e6-96231b3b80d8
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const2
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@106339 91177308-0d34-0410-b5e6-96231b3b80d8
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