derek.holloway
7502bf64a4
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32 lines
970 B
C
32 lines
970 B
C
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fms-extensions -fdump-record-layouts -fsyntax-only %s 2>/dev/null \
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// RUN: | FileCheck %s
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// Test that large _BitInt fields do not overflow the internal storage unit tracker (previously unsigned char).
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// If the bug exists, this struct splits into two units.
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// If fixed, f1 and f2 are packed into a single unit.
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#pragma ms_struct on
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struct __attribute__((packed, aligned(1))) A {
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_BitInt(250) f1 : 2;
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_BitInt(250) f2 : 2;
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};
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struct __attribute__((packed, aligned(1))) B {
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_BitInt(500) f1 : 2;
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_BitInt(500) f2 : 255;
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};
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// CHECK-LABEL: 0 | struct A{{$}}
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// CHECK-NEXT:0:0-1 | _BitInt(250) f1
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// CHECK-NEXT:0:2-3 | _BitInt(250) f2
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// CHECK-NEXT: | [sizeof=32, align=1]
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// CHECK-LABEL: 0 | struct B{{$}}
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// CHECK-NEXT:0:0-1 | _BitInt(500) f1
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// CHECK-NEXT:0:2-256 | _BitInt(500) f2
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// CHECK-NEXT: | [sizeof=64, align=1]
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int x[sizeof(struct A)];
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int y[sizeof(struct B)];
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