On 08/12/2015 05:39 PM, Marek Polacek wrote:
This patch fixes a defect in -Wshift-overflow. We should only warn about left-shifting 1 into the sign bit when -Wshift-overflow=2. But this doesn't apply only for 1 << 31, but also for 2 << 30, etc. In C++14, never warn about this.
And then there's this: https://gcc.gnu.org/ml/gcc-testresults/2015-08/msg01036.html [ Yes, that's at run time, not compile time ... ] -- Toon Moene - e-mail: t...@moene.org - phone: +31 346 214290 Saturnushof 14, 3738 XG Maartensdijk, The Netherlands At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/ Progress of GNU Fortran: http://gcc.gnu.org/wiki/GFortran#news
