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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-O2 -fdump-tree-optimized" } */
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3
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4 #define REGISTER register
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5
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6 #if defined __arm__
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7 # define REG1 asm("r4")
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8 #elif defined __i386__
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9 # define REG1 asm("ebx")
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10 #elif defined __mips__
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11 # define REG1 asm("s0")
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12 #elif defined __x86_64__
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13 # define REG1 asm("rbp")
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14 #else
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15 # undef REGISTER
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16 # define REGISTER
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17 # define REG1
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18 #endif
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19
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20 REGISTER long data_0 REG1;
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21 long data_3;
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22
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23 long foo(long data, long v)
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24 {
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25 long i;
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26 long t, u;
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27
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28 if (data)
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29 i = data_0 + data_3;
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30 else {
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31 v = 2;
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32 i = 5;
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33 }
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34 t = data_0 + data_3;
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35 u = i;
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36 return v * t * u;
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37 }
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38
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39 /* We should not eliminate global register variable when it is the RHS of
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40 a single assignment. So the number of loads from data_0 has to match
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41 that of the number of adds (we hoist data_0 + data_3 above the
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42 if (data) and eliminate the useless copy). */
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43
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44 /* { dg-final { scan-tree-dump-times "= data_0;" 1 "optimized" { target { arm*-*-* i?86-*-* mips*-*-* x86_64-*-* } } } } */
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45 /* { dg-final { scan-tree-dump-times " \\+ " 1 "optimized" { target { ! { arm*-*-* i?86-*-* mips*-*-* x86_64-*-* } } } } } */
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