[llvm-dev] Builder lld-x86_64-win7 is back
Joerg Sonnenberger via llvm-dev
llvm-dev at lists.llvm.org
Tue Feb 9 15:47:10 PST 2016
On Tue, Feb 09, 2016 at 03:09:01PM -0800, Rui Ueyama wrote:
> On Tue, Feb 9, 2016 at 3:03 PM, Joerg Sonnenberger via llvm-commits <
> llvm-commits at lists.llvm.org> wrote:
> > On Tue, Feb 09, 2016 at 02:40:06PM -0800, Rui Ueyama via llvm-commits
> > wrote:
> > > Tried to fix the warning, and I'm not now sure if the warning makes
> > sense.
> > > These "'~': zero extending '<smaller integer type>' to 'int64_t' of
> > greater
> > > size" warning may be annoying as it is issued for code like "int64_t x =
> > > ~<some-int32_t-var>".
> > This sounds like something were the semantic of the code is not
> > obviously what was originally intended.
> So you thought that was useful? Then why doesn't clang/gcc warn on that?
Good question :) I mean consider:
x &= ~7;
was the intention here really to clear the upper half of x as well? Same
question for a variable instead of 7.
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