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1 #include "harness.h"
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2
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3 /* This problem occurs if a function is inlined. When its local
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4 variables get allocated space on the caller's (the function to
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5 which it is inlined) stack frame, they don't get 16-byte alignment
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6 even if they need it. Here's an example with a union (that's the
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7 first case I uncovered, but it's probably a general occurrence on
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8 inlining). */
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9
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10 #define N 10
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11 /* adjust N = size of buffer to try to get bad alignment for inlined union */
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12
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13 #define DO_INLINE __attribute__ ((always_inline))
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14 #define DONT_INLINE __attribute__ ((noinline))
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15
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16 #ifdef __LITTLE_ENDIAN__
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17 static inline DO_INLINE int inline_me(vector signed short data)
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18 {
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19 union {vector signed short v; signed short s[8];} u;
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20 signed short x;
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21 unsigned char x1, x2;
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22
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23 u.v = data;
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24 x = u.s[7];
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25 x1 = (x >> 8) & 0xff;
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26 x2 = x & 0xff;
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27 return ((x2 << 8) | x1);
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28 }
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29 #else
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30 static inline DO_INLINE int inline_me(vector signed short data)
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31 {
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32 union {vector signed short v; signed short s[8];} u;
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33 u.v = data;
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34 return u.s[7];
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35 }
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36 #endif
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37
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38 static DONT_INLINE int foo(vector signed short data)
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39 {
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40 int c, buffer[N], i;
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41 c = inline_me(data);
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42 for (i=0; i<N; i++) {
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43 if (i == 0)
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44 buffer[i] = c;
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45 else
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46 buffer[i] = buffer[i-1] + c*i;
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47 }
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48 return buffer[N-1];
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49 }
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50
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51 static void test()
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52 {
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53 check(foo((vector signed short)
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54 ((vector unsigned char){1,2,3,4,5,6,7,8,
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55 9,10,11,12,13,14,15,16})) == 0x2b4e0,
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56 "foo");
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57 }
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