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abeeae570e
This is split from D113107 to address #56204 and https://discourse.llvm.org/t/how-to-build-compiler-rt-for-new-x86-half-float-abi/63366 Reviewed By: zahiraam, rjmccall, bkramer, MaskRay Differential Revision: https://reviews.llvm.org/D128571
25 lines
1.4 KiB
C
25 lines
1.4 KiB
C
// RUN: %clang_cc1 -Wdouble-promotion -Wimplicit-float-conversion %s -triple x86_64-apple-macosx10.12 -verify=x86,expected
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// RUN: %clang_cc1 -Wdouble-promotion -Wimplicit-float-conversion %s -triple armv7-apple-ios9.0 -verify=arm,expected
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// On ARM, long double and double both map to double precision 754s, so there
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// isn't any reason to warn on conversions back and forth.
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long double ld;
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double d;
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_Float16 f16;
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int main(void) {
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ld = d; // x86-warning {{implicit conversion increases floating-point precision: 'double' to 'long double'}}
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d = ld; // x86-warning {{implicit conversion loses floating-point precision: 'long double' to 'double'}}
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ld += d; // x86-warning {{implicit conversion increases floating-point precision: 'double' to 'long double'}}
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d += ld; // x86-warning {{implicit conversion when assigning computation result loses floating-point precision: 'long double' to 'double'}}
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f16 = ld; // expected-warning {{implicit conversion loses floating-point precision: 'long double' to '_Float16'}}
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ld = f16; // expected-warning {{implicit conversion increases floating-point precision: '_Float16' to 'long double'}}
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f16 += ld; // expected-warning {{implicit conversion when assigning computation result loses floating-point precision: 'long double' to '_Float16'}}
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ld += f16; // expected-warning {{implicit conversion increases floating-point precision: '_Float16' to 'long double'}}
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}
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