[llvm-commits] [Patch] Update to APSInt

[Richard Trieu]

This patch adds missing operator== and operator!= to APSInt.  Currently,
comparing two APSInt's will compare them with APInt's operator==, which
does not check signedness.  This may lead to a problem where a large
unsigned APSInt will equal a negative APSInt, such as -1 and 0xffff.

One patch is to LLVM to add the functions.  The other is to fix up the uses
in Clang.
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