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111
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1 /* { dg-do compile } */
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131
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2 /* { dg-options "-O2 -fno-store-merging" } */
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111
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3
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4 struct B {
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5 B() {}
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6 int x;
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7 int a : 6;
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8 int b : 6;
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9 int c : 6;
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10 };
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11
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12 struct C : B {
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13 char d;
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14 };
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15
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16 C c;
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17
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18 int main()
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19 {
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20 /* We have to make sure to not cause a store data race between
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21 c.c and c.d residing in the tail padding of B. */
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22 c.c = 1;
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23 c.d = 2;
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24 }
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25
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26 /* In particular on x86 c.d should not be loaded/stored via movl. */
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27 /* { dg-final { scan-assembler-not "movl" { target { x86_64-*-* i?86-*-* } } } } */
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