46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/* Test for constant expressions: broken optimization with const variables. */
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/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
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/* { dg-do compile } */
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/* { dg-options "-std=iso9899:1999 -O2" } */
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/* Note: not using -pedantic since the -std option alone should be enough
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to give the correct behavior to conforming programs. */
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static const int ZERO = 0;
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static const double DZERO = 0;
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int *a;
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int b;
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long *c;
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/* Assertion that n is a constant zero: so the conditional expression
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has type 'int *' instead of 'void *'.
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*/
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#define ASSERT_NPC(n) (b = *(1 ? a : (n)))
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/* Assertion that n is not a constant zero: so the conditional
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expressions has type 'void *' instead of 'int *'.
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*/
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#define ASSERT_NOT_NPC(n) (c = (1 ? a : (void *)(__SIZE_TYPE__)(n)))
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void
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foo (void)
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{
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ASSERT_NPC (0);
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ASSERT_NOT_NPC (ZERO);
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ASSERT_NPC (0 + 0);
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ASSERT_NOT_NPC (ZERO + 0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
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ASSERT_NOT_NPC (ZERO + ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
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ASSERT_NPC (+0);
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ASSERT_NOT_NPC (+ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
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ASSERT_NPC (-0);
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ASSERT_NOT_NPC (-ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
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ASSERT_NPC ((char) 0);
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ASSERT_NOT_NPC ((char) ZERO);
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ASSERT_NPC ((int) 0);
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ASSERT_NOT_NPC ((int) ZERO);
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ASSERT_NPC ((int) 0.0);
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ASSERT_NOT_NPC ((int) DZERO);
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ASSERT_NOT_NPC ((int) +0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
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ASSERT_NOT_NPC ((int) (0.0+0.0)); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
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ASSERT_NOT_NPC ((int) (double)0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
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}
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