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111
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1 /* { dg-options "-Os -fdump-rtl-hoist -fno-code-hoisting" } */
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2 /* The rtl hoist pass requires that the expression to be hoisted can
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3 be assigned without clobbering cc. For a PLUS rtx on S/390 this
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4 requires a load address instruction which is fine on 64 bit but
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5 cannot be used on 31 bit since it does a 31 bit add only. */
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6 /* { dg-final { scan-rtl-dump "PRE/HOIST: end of bb .* copying expression" "hoist" { target { { !s390*-*-* || lp64 } && nonpic } } } } */
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7
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8 #define BUF 100
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9 long a[BUF];
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10
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11 void com (long);
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12 void bar (long);
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13
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14 long foo (long x, long y, long z)
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15 {
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16 /* "x+y" won't be hoisted if "-fira-hoist-pressure" is disabled,
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17 because its rtx_cost is too small. */
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18 if (z)
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19 {
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20 a[1] = a[0] + a[2];
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21 a[2] = a[1] + a[3];
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22 a[3] = a[2] + a[4];
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23 a[4] = a[3] + a[5];
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24 a[5] = a[4] + a[6];
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25 a[6] = a[5] + a[7];
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26 a[7] = a[6] + a[8];
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27 com (x+y);
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28 }
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29 else
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30 {
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31 bar (x+y);
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32 }
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33
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34 return 0;
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35 }
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