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111
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1 /* PR tree-optimization/58791 */
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2 /* { dg-do run } */
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3 /* { dg-options "-g" } */
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4
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5 #include "../nop.h"
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6
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7 __attribute__((noinline, noclone)) unsigned int
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8 foo (unsigned int a0, unsigned int a1, unsigned int a2,
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9 unsigned int a3, unsigned int a4)
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10 {
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11 unsigned int b0, b1, b2, b3, b4, e;
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12 /* this can be optimized to four additions... */
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13 b4 = a4 + a3 + a2 + a1 + a0; /* { dg-final { gdb-test pr58791-5.c:20 "b4" "4681" } } */
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14 b3 = a3 + a2 + a1 + a0; /* { dg-final { gdb-test pr58791-5.c:20 "b3" "585" } } */
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15 b2 = a2 + a1 + a0; /* { dg-final { gdb-test pr58791-5.c:20 "b2" "73" } } */
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16 b1 = a1 + a0; /* { dg-final { gdb-test pr58791-5.c:20 "b1" "9" } } */
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17 /* This is actually 0 */
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18 e = b4 - b3 + b2 - b1 - a4 - a2; /* { dg-final { gdb-test pr58791-5.c:20 "e" "0" } } */
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19 asm volatile (NOP : : : "memory");
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20 asm volatile (NOP : : : "memory");
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21 return e;
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22 }
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23
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24 int
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25 main ()
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26 {
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27 foo (1, 8, 64, 512, 4096);
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28 return 0;
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29 }
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