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annotate gcc/testsuite/gcc.dg/no-strict-overflow-6.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-fno-strict-overflow -O2 -fdump-tree-optimized" } */
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3
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4 /* Source: Ian Lance Taylor. */
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5
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6 /* VRP test. We can not simplify the conditional when not using
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7 strict overflow semantics. We don't test this with
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8 -fstrict-overflow because it turns into an infinite loop. That is
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9 OK but it would also be OK to not do that. */
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10
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11 int
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12 foo ()
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13 {
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14 int i, bits;
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15 for (i = 1, bits = 1; i > 0; i += i)
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16 ++bits;
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17 return bits - sizeof(int) * __CHAR_BIT__;
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18 }
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19
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20 /* { dg-final { scan-tree-dump "return 0" "optimized" } } */