vsavchenko marked an inline comment as done.
vsavchenko added inline comments.
================
Comment at: clang/lib/StaticAnalyzer/Core/RangeConstraintManager.cpp:462
+ if (CoversTheWholeType) {
+ return {ValueFactory.getMinValue(RangeType),
+ ValueFactory.getMaxValue(RangeType)};
----------------
NoQ wrote:
> vsavchenko wrote:
> > NoQ wrote:
> > > You mean zero, right?
> > No, not always. It still can be signed at this point.
> Ok, so i misunderstood. This function computes range of `abs($x)` aka `|$x|`
> given the range for `$x`, right?
I guess I should fix my comments (and maybe the name for this function).
This function finds absolute maximum, i.e. the value `C: |$x| <= C` and returns
the range `[-C, C]` for signed `$x`s and `[0, C]` for unsigned `$x`s.
So this new range is guaranteed to include the original range.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D80117/new/
https://reviews.llvm.org/D80117
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