derek.holloway
7502bf64a4
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55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify -std=c23 %s
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// GH87641 noticed that integer promotion of a bit-field of bit-precise integer
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// type was promoting to int rather than the type of the bit-field.
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struct S {
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unsigned _BitInt(7) x : 2;
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unsigned _BitInt(2) y : 2;
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unsigned _BitInt(72) z : 28;
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_BitInt(31) a : 12;
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_BitInt(33) b : 33;
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};
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// We don't have to worry about promotion cases where the bit-precise type is
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// smaller than the width of the bit-field; that can't happen.
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struct T {
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unsigned _BitInt(28) oh_no : 72; // expected-error {{width of bit-field 'oh_no' (72 bits) exceeds the width of its type (28 bits)}}
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};
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static_assert(
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_Generic(+(struct S){}.x,
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int : 0,
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unsigned _BitInt(7) : 1,
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unsigned _BitInt(2) : 2
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) == 1);
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static_assert(
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_Generic(+(struct S){}.y,
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int : 0,
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unsigned _BitInt(7) : 1,
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unsigned _BitInt(2) : 2
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) == 2);
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static_assert(
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_Generic(+(struct S){}.z,
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int : 0,
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unsigned _BitInt(72) : 1,
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unsigned _BitInt(28) : 2
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) == 1);
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static_assert(
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_Generic(+(struct S){}.a,
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int : 0,
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_BitInt(31) : 1,
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_BitInt(12) : 2,
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unsigned _BitInt(31) : 3
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) == 1);
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static_assert(
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_Generic(+(struct S){}.b,
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int : 0,
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long long : 1,
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_BitInt(33) : 2,
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unsigned _BitInt(33) : 3
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) == 2);
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