https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117639
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> --- With -O3 -std=c++20 https://godbolt.org/z/3WKnn8rax we inline but still get stuck on loop calling log and modifying errno. Without -std=c++20 we reach --param max-inline-insns-auto. We need --param max-inline-insns-auto=55 to inline. Default is 30. IPA function summary for void std::vector<_Tp, _Alloc>::_M_default_append(size_type) [with _Tp = float; _Alloc = std::allocator<float>]/1347 inlinable global time: 38.660448 self size: 57 global size: 72 min size: 0 self stack: 0 global stack: 0 estimated growth:1 size:0.000000, time:0.000000 size:3.000000, time:2.000000, executed if:(not inlined) size:2.000000, time:2.000000, nonconst if:(op1 changed) size:0.500000, time:0.250000, executed if:(op0 not sra candidate) && (op1 != 0) && (not inlined), nonconst if:(op0 not sra candidate) && (op0[ref offset: 64] changed) && (op1 != 0) && (not inlined) size:0.500000, time:0.250000, executed if:(op0 not sra candidate) && (op1 != 0), nonconst if:(op0 not sra candidate) && (op0[ref offset: 64] changed) && (op1 != 0) size:0.500000, time:0.250000, executed if:(op0 not sra candidate) && (op1 != 0) && (not inlined), nonconst if:(op0[ref offset: 0] changed) && (op0 not sra candidate) && (op1 != 0) && (not inlined) size:0.500000, time:0.250000, executed if:(op0 not sra candidate) && (op1 != 0), nonconst if:(op0[ref offset: 0] changed) && (op0 not sra candidate) && (op1 != 0) size:5.000000, time:2.170000, executed if:(op1 != 0), nonconst if:(op0[ref offset: 64] changed || op0[ref offset: 0] changed) && (op1 != 0) size:0.500000, time:0.250000, executed if:(op0 not sra candidate) && (op1 != 0) && (not inlined), nonconst if:(op0[ref offset: 128] changed) && (op0 not sra candidate) && (op1 != 0) && (not inlined) size:0.500000, time:0.250000, executed if:(op0 not sra candidate) && (op1 != 0), nonconst if:(op0[ref offset: 128] changed) && (op0 not sra candidate) && (op1 != 0) size:2.000000, time:1.000000, executed if:(op1 != 0), nonconst if:(op0[ref offset: 64] changed || op0[ref offset: 128] changed) && (op1 != 0) size:2.000000, time:1.000000, executed if:(op1 != 0), nonconst if:(op1 changed || op0[ref offset: 64] changed || op0[ref offset: 128] changed) && (op1 != 0) size:8.000000, time:2.680000, executed if:(op1 != 0), nonconst if:(op1 changed || op0[ref offset: 64] changed || op0[ref offset: 0] changed) && (op1 != 0) size:10.000000, time:3.061500, executed if:(op1 != 0) size:2.500000, time:0.752500, executed if:(op0 not sra candidate) && (op1 != 0) && (not inlined) size:2.500000, time:0.752500, executed if:(op0 not sra candidate) && (op1 != 0) size:2.000000, time:0.670000, executed if:(op1 != 0), nonconst if:(op0[ref offset: 0] changed) && (op1 != 0) size:6.000000, time:1.500000, executed if:(op1 != 0), nonconst if:(op1 changed) && (op1 != 0) size:2.000000, time:0.330000, executed if:(op1,(# + 18446744073709551615) != 0) && (op1 != 0), nonconst if:(op1,(# + 18446744073709551615) != 0) && (op1 changed) && (op1 != 0) size:10.000000, time:11.670000, executed if:(op1,(# + 18446744073709551615) != 0) && (op1 != 0) calls: void operator delete(void*, std::size_t)/1478 function body not available freq:0.18 loop depth: 0 size: 3 time: 12 predicate: (op0[ref offset: 0] != 0B) && (op1 != 0) void* __builtin_memcpy(void*, const void*, long unsigned int)/1477 function body not available freq:0.14 loop depth: 0 size: 4 time: 13 predicate: (op1 != 0) static _ForwardIterator std::__uninitialized_default_n_1<true>::__uninit_default_n(_ForwardIterator, _Size) [with _ForwardIterator = float*; _Size = long unsigned int]/1480 inlined freq:0.34 Stack frame offset 0, callee self size 0 allocate.isra/1427 inlined freq:0.34 Stack frame offset 0, callee self size 0 long int __builtin_expect(long int, long int)/1473 function body not available freq:0.34 loop depth: 0 size: 0 time: 0 predicate: (op1 != 0) op1 is compile time invariant op1 points to local or readonly memory void __builtin_unreachable()/1471 unreachable freq:0.00 loop depth: 0 size: 0 time: 0 predicate: (false) void __builtin_unreachable()/1471 unreachable freq:0.00 loop depth: 0 size: 0 time: 0 predicate: (false) void* operator new(std::size_t)/1476 function body not available freq:0.30 loop depth: 0 size: 3 time: 12 predicate: (op1 != 0) void std::__throw_length_error(const char*)/1472 function body not available freq:0.00 loop depth: 0 size: 2 time: 11 predicate: (op1 != 0) op0 is compile time invariant static _ForwardIterator std::__uninitialized_default_n_1<true>::__uninit_default_n(_ForwardIterator, _Size) [with _ForwardIterator = float*; _Size = long unsigned int]/1480 inlined freq:0.16 Stack frame offset 0, callee self size 0 void __builtin_unreachable()/1471 function body not available freq:0.00 loop depth: 0 size: 0 time: 0 predicate: (op1 != 0) void __builtin_unreachable()/1471 function body not available freq:0.00 loop depth: 0 size: 0 time: 0 predicate: (op1 != 0)
