xref: /aosp_15_r20/external/clang/test/SemaCXX/complex-folding.cpp (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 %s -std=c++1z -fsyntax-only -verify
2*67e74705SXin Li //
3*67e74705SXin Li // Test the constant folding of builtin complex numbers.
4*67e74705SXin Li 
5*67e74705SXin Li static_assert((0.0 + 0.0j) == (0.0 + 0.0j));
6*67e74705SXin Li static_assert((0.0 + 0.0j) != (0.0 + 0.0j)); // expected-error {{static_assert}}
7*67e74705SXin Li 
8*67e74705SXin Li static_assert((0.0 + 0.0j) == 0.0);
9*67e74705SXin Li static_assert(0.0 == (0.0 + 0.0j));
10*67e74705SXin Li static_assert(0.0 == 0.0j);
11*67e74705SXin Li static_assert((0.0 + 1.0j) != 0.0);
12*67e74705SXin Li static_assert(1.0 != (0.0 + 0.0j));
13*67e74705SXin Li static_assert(0.0 != 1.0j);
14*67e74705SXin Li 
15*67e74705SXin Li // Walk around the complex plane stepping between angular differences and
16*67e74705SXin Li // equality.
17*67e74705SXin Li static_assert((1.0 + 0.0j) == (0.0 + 0.0j)); // expected-error {{static_assert}}
18*67e74705SXin Li static_assert((1.0 + 0.0j) == (1.0 + 0.0j));
19*67e74705SXin Li static_assert((1.0 + 1.0j) == (1.0 + 0.0j)); // expected-error {{static_assert}}
20*67e74705SXin Li static_assert((1.0 + 1.0j) == (1.0 + 1.0j));
21*67e74705SXin Li static_assert((0.0 + 1.0j) == (1.0 + 1.0j)); // expected-error {{static_assert}}
22*67e74705SXin Li static_assert((0.0 + 1.0j) == (0.0 + 1.0j));
23*67e74705SXin Li static_assert((-1.0 + 1.0j) == (0.0 + 1.0j)); // expected-error {{static_assert}}
24*67e74705SXin Li static_assert((-1.0 + 1.0j) == (-1.0 + 1.0j));
25*67e74705SXin Li static_assert((-1.0 + 0.0j) == (-1.0 + 1.0j)); // expected-error {{static_assert}}
26*67e74705SXin Li static_assert((-1.0 + 0.0j) == (-1.0 + 0.0j));
27*67e74705SXin Li static_assert((-1.0 - 1.0j) == (-1.0 + 0.0j)); // expected-error {{static_assert}}
28*67e74705SXin Li static_assert((-1.0 - 1.0j) == (-1.0 - 1.0j));
29*67e74705SXin Li static_assert((0.0 - 1.0j) == (-1.0 - 1.0j)); // expected-error {{static_assert}}
30*67e74705SXin Li static_assert((0.0 - 1.0j) == (0.0 - 1.0j));
31*67e74705SXin Li static_assert((1.0 - 1.0j) == (0.0 - 1.0j)); // expected-error {{static_assert}}
32*67e74705SXin Li static_assert((1.0 - 1.0j) == (1.0 - 1.0j));
33*67e74705SXin Li 
34*67e74705SXin Li // Test basic mathematical folding of both complex and real operands.
35*67e74705SXin Li static_assert(((1.0 + 0.5j) + (0.25 - 0.75j)) == (1.25 - 0.25j));
36*67e74705SXin Li static_assert(((1.0 + 0.5j) + 0.25) == (1.25 + 0.5j));
37*67e74705SXin Li static_assert((1.0 + (0.25 - 0.75j)) == (1.25 - 0.75j));
38*67e74705SXin Li 
39*67e74705SXin Li static_assert(((1.0 + 0.5j) - (0.25 - 0.75j)) == (0.75 + 1.25j));
40*67e74705SXin Li static_assert(((1.0 + 0.5j) - 0.25) == (0.75 + 0.5j));
41*67e74705SXin Li static_assert((1.0 - (0.25 - 0.75j)) == (0.75 + 0.75j));
42*67e74705SXin Li 
43*67e74705SXin Li static_assert(((1.25 + 0.5j) * (0.25 - 0.75j)) == (0.6875 - 0.8125j));
44*67e74705SXin Li static_assert(((1.25 + 0.5j) * 0.25) == (0.3125 + 0.125j));
45*67e74705SXin Li static_assert((1.25 * (0.25 - 0.75j)) == (0.3125 - 0.9375j));
46*67e74705SXin Li 
47*67e74705SXin Li static_assert(((1.25 + 0.5j) / (0.25 - 0.75j)) == (-0.1 + 1.7j));
48*67e74705SXin Li static_assert(((1.25 + 0.5j) / 0.25) == (5.0 + 2.0j));
49*67e74705SXin Li static_assert((1.25 / (0.25 - 0.75j)) == (0.5 + 1.5j));
50*67e74705SXin Li 
51*67e74705SXin Li // Test that infinities are preserved, don't turn into NaNs, and do form zeros
52*67e74705SXin Li // when the divisor.
53*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + 1.0j) * 1.0)) == 1);
54*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((1.0 + __builtin_inf() * 1.0j) * 1.0)) == 1);
55*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__(1.0 * (__builtin_inf() + 1.0j))) == 1);
56*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__(1.0 * (1.0 + __builtin_inf() * 1.0j))) == 1);
57*67e74705SXin Li 
58*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + 1.0j) * (1.0 + 1.0j))) == 1);
59*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((1.0 + 1.0j) * (__builtin_inf() + 1.0j))) == 1);
60*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + 1.0j) * (__builtin_inf() + 1.0j))) == 1);
61*67e74705SXin Li 
62*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((1.0 + __builtin_inf() * 1.0j) * (1.0 + 1.0j))) == -1);
63*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((1.0 + __builtin_inf() * 1.0j) * (1.0 + 1.0j))) == 1);
64*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((1.0 + 1.0j) * (1.0 + __builtin_inf() * 1.0j))) == -1);
65*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((1.0 + 1.0j) * (1.0 + __builtin_inf() * 1.0j))) == 1);
66*67e74705SXin Li 
67*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((1.0 + __builtin_inf() * 1.0j) * (1.0 + __builtin_inf() * 1.0j))) == -1);
68*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + __builtin_inf() * 1.0j) * (__builtin_inf() + __builtin_inf() * 1.0j))) == -1);
69*67e74705SXin Li 
70*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + 1.0j) / (1.0 + 1.0j))) == 1);
71*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__(1.0 + (__builtin_inf() * 1.0j) / (1.0 + 1.0j))) == 1);
72*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((__builtin_inf() + __builtin_inf() * 1.0j) / (1.0 + 1.0j))) == 1);
73*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + 1.0j) / 1.0)) == 1);
74*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__(1.0 + (__builtin_inf() * 1.0j) / 1.0)) == 1);
75*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((__builtin_inf() + __builtin_inf() * 1.0j) / 1.0)) == 1);
76*67e74705SXin Li 
77*67e74705SXin Li static_assert(((1.0 + 1.0j) / (__builtin_inf() + 1.0j)) == (0.0 + 0.0j));
78*67e74705SXin Li static_assert(((1.0 + 1.0j) / (1.0 + __builtin_inf() * 1.0j)) == (0.0 + 0.0j));
79*67e74705SXin Li static_assert(((1.0 + 1.0j) / (__builtin_inf() + __builtin_inf() * 1.0j)) == (0.0 + 0.0j));
80*67e74705SXin Li static_assert(((1.0 + 1.0j) / __builtin_inf()) == (0.0 + 0.0j));
81*67e74705SXin Li 
82*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((1.0 + 1.0j) / (0.0 + 0.0j))) == 1);
83*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((1.0 + 1.0j) / 0.0)) == 1);
84*67e74705SXin Li 
85*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + 1.0j) / (0.0 + 0.0j))) == 1);
86*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((1.0 + __builtin_inf() * 1.0j) / (0.0 + 0.0j))) == 1);
87*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((__builtin_inf() + __builtin_inf() * 1.0j) / (0.0 + 0.0j))) == 1);
88*67e74705SXin Li static_assert(__builtin_isinf_sign(__real__((__builtin_inf() + 1.0j) / 0.0)) == 1);
89*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((1.0 + __builtin_inf() * 1.0j) / 0.0)) == 1);
90*67e74705SXin Li static_assert(__builtin_isinf_sign(__imag__((__builtin_inf() + __builtin_inf() * 1.0j) / 0.0)) == 1);
91