On 6/7/23 15:32, Andrew Pinski via Gcc-patches wrote:
This allows unsigned types if the inner type where the negation is located has greater than or equal to precision than the outer type. branchless-cond.c needs to be updated since now we change it to use a multiply rather than still having (-a)&c in there. OK? Bootstrapped and tested on x86_64-linux-gnu. gcc/ChangeLog: * match.pd (`X & -Y -> X * Y`): Allow for truncation and the same type for unsigned types. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/branchless-cond.c: Update testcase.
OK. jeff