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Rev 338 |
/* PR rtl-optimization/20290 */
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/* PR rtl-optimization/20290 */
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/* We used to mis-optimize the second loop in main on at least ppc and
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/* We used to mis-optimize the second loop in main on at least ppc and
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arm, because tree loop would change the loop to something like:
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arm, because tree loop would change the loop to something like:
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ivtmp.65 = &l[i];
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ivtmp.65 = &l[i];
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ivtmp.16 = 113;
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ivtmp.16 = 113;
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goto <bb 4> (<L4>);
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goto <bb 4> (<L4>);
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<L3>:;
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<L3>:;
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*(ivtmp.65 + 4294967292B) = 9;
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*(ivtmp.65 + 4294967292B) = 9;
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i = i + 1;
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i = i + 1;
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<L4>:;
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<L4>:;
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ivtmp.16 = ivtmp.16 - 1;
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ivtmp.16 = ivtmp.16 - 1;
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ivtmp.65 = ivtmp.65 + 4B;
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ivtmp.65 = ivtmp.65 + 4B;
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if (ivtmp.16 != 0) goto <L3>;
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if (ivtmp.16 != 0) goto <L3>;
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We used to consider the increment of i as executed in every
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We used to consider the increment of i as executed in every
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iteration, so we'd miscompute the final value. */
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iteration, so we'd miscompute the final value. */
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extern void abort (void);
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extern void abort (void);
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void
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void
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check (unsigned int *l)
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check (unsigned int *l)
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{
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{
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int i;
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int i;
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for (i = 0; i < 288; i++)
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for (i = 0; i < 288; i++)
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if (l[i] != 7 + (i < 256 || i >= 280) + (i >= 144 && i < 256))
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if (l[i] != 7 + (i < 256 || i >= 280) + (i >= 144 && i < 256))
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abort ();
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abort ();
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}
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}
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int
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int
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main (void)
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main (void)
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{
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{
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int i;
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int i;
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unsigned int l[288];
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unsigned int l[288];
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for (i = 0; i < 144; i++)
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for (i = 0; i < 144; i++)
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l[i] = 8;
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l[i] = 8;
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for (; i < 256; i++)
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for (; i < 256; i++)
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l[i] = 9;
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l[i] = 9;
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for (; i < 280; i++)
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for (; i < 280; i++)
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l[i] = 7;
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l[i] = 7;
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for (; i < 288; i++)
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for (; i < 288; i++)
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l[i] = 8;
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l[i] = 8;
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check (l);
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check (l);
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return 0;
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return 0;
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}
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}
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