https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90401
--- Comment #2 from Feng Xue <fxue at os dot amperecomputing.com> --- (In reply to Richard Biener from comment #1) > Huh. IPA-CP dump difference: > > @@ -26,6 +26,8 @@ > Unknown VR > callsite int caller(int, int&)/2 -> int callee(int&)/1 : > param 0: UNKNOWN > + Aggregate passed by reference: > + offset: 0, cst: 1 > value: 0x0, mask: 0xfffffffffffffffc > VR ~[0, 0] > Jump functions of caller int callee(int&)/1: This jump function is for the 2nd call. For the 1st call, IPA-CP can not deduce that. So there is no enough benefit to convince IPA-CP to clone the "callee()". > > I guess somehow IPA-CP walks stmts for defs instead of virtual operands? Yes, it is. IPA-CP only walks stmts in callsite basic block.
