1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
// RUN: %clang_cc1 -Wdouble-promotion -Wimplicit-float-conversion %s -triple x86_64-apple-macosx10.12 -verify=x86,expected
// RUN: %clang_cc1 -Wdouble-promotion -Wimplicit-float-conversion %s -triple armv7-apple-ios9.0 -verify=arm,expected
// On ARM, long double and double both map to double precision 754s, so there
// isn't any reason to warn on conversions back and forth.
long double ld;
double d;
_Float16 f16; // x86-error {{_Float16 is not supported on this target}}
int main() {
ld = d; // x86-warning {{implicit conversion increases floating-point precision: 'double' to 'long double'}}
d = ld; // x86-warning {{implicit conversion loses floating-point precision: 'long double' to 'double'}}
ld += d; // x86-warning {{implicit conversion increases floating-point precision: 'double' to 'long double'}}
d += ld; // x86-warning {{implicit conversion when assigning computation result loses floating-point precision: 'long double' to 'double'}}
f16 = ld; // expected-warning {{implicit conversion loses floating-point precision: 'long double' to '_Float16'}}
ld = f16; // expected-warning {{implicit conversion increases floating-point precision: '_Float16' to 'long double'}}
f16 += ld; // expected-warning {{implicit conversion when assigning computation result loses floating-point precision: 'long double' to '_Float16'}}
ld += f16; // expected-warning {{implicit conversion increases floating-point precision: '_Float16' to 'long double'}}
}
|
