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42 lines
851 B
C
42 lines
851 B
C
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int foo1 ()
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{
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union { int l; char c[sizeof (int)]; } k1;
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char *m;
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k1.l = 0;
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/* This test variant triggers ADDR_EXPR of k explicitly in order to
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ensure it's registered with the runtime. */
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m = k1.c;
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k1.c [sizeof (int)-1] = m[sizeof (int)-2];
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}
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int foo2 ()
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{
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union { int l; char c[sizeof (int)]; } k2;
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k2.l = 0;
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/* Since this access is known-in-range, k need not be registered
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with the runtime, but then this access better not be instrumented
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either. */
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k2.c [sizeof (int)-1] ++;
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return k2.l;
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}
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int foo3idx = sizeof (int)-1;
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int foo3 ()
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{
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union { int l; char c[sizeof (int)]; } k3;
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k3.l = 0;
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/* NB this test uses foo3idx, an extern variable, to defeat mudflap
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known-in-range-index optimizations. */
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k3.c [foo3idx] ++;
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return k3.l;
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}
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int main ()
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{
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foo1 ();
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foo2 ();
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foo3 ();
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return 0;
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}
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