| 1 | // RUN: %clang_cc1 -Wdouble-promotion -Wimplicit-float-conversion %s -triple x86_64-apple-macosx10.12 -verify=x86,expected |
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| 2 | // RUN: %clang_cc1 -Wdouble-promotion -Wimplicit-float-conversion %s -triple armv7-apple-ios9.0 -verify=arm,expected |
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| 3 | |
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| 4 | // On ARM, long double and double both map to double precision 754s, so there |
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| 5 | // isn't any reason to warn on conversions back and forth. |
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| 6 | |
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| 7 | long double ld; |
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| 8 | double d; |
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| 9 | _Float16 f16; // x86-error {{_Float16 is not supported on this target}} |
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| 10 | |
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| 11 | int main() { |
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| 12 | ld = d; // x86-warning {{implicit conversion increases floating-point precision: 'double' to 'long double'}} |
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| 13 | d = ld; // x86-warning {{implicit conversion loses floating-point precision: 'long double' to 'double'}} |
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| 14 | |
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| 15 | ld += d; // x86-warning {{implicit conversion increases floating-point precision: 'double' to 'long double'}} |
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| 16 | d += ld; // x86-warning {{implicit conversion when assigning computation result loses floating-point precision: 'long double' to 'double'}} |
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| 17 | |
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| 18 | f16 = ld; // expected-warning {{implicit conversion loses floating-point precision: 'long double' to '_Float16'}} |
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| 19 | ld = f16; // expected-warning {{implicit conversion increases floating-point precision: '_Float16' to 'long double'}} |
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| 20 | |
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| 21 | f16 += ld; // expected-warning {{implicit conversion when assigning computation result loses floating-point precision: 'long double' to '_Float16'}} |
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| 22 | ld += f16; // expected-warning {{implicit conversion increases floating-point precision: '_Float16' to 'long double'}} |
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| 23 | } |
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| 24 | |
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| 25 | |
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