From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.dg/c90-const-expr-3.c | 46 +++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/c90-const-expr-3.c (limited to 'gcc/testsuite/gcc.dg/c90-const-expr-3.c') diff --git a/gcc/testsuite/gcc.dg/c90-const-expr-3.c b/gcc/testsuite/gcc.dg/c90-const-expr-3.c new file mode 100644 index 000000000..46a022734 --- /dev/null +++ b/gcc/testsuite/gcc.dg/c90-const-expr-3.c @@ -0,0 +1,46 @@ +/* Test for constant expressions: broken optimization with const variables. */ +/* Reference: ISO 9989:1990 6.5.15 */ +/* Origin: Joseph Myers */ +/* { dg-do compile } */ +/* { dg-options "-std=iso9899:1990 -O2" } */ +/* Note: not using -pedantic since the -std option alone should be enough + to give the correct behavior to conforming programs. */ + +static const int ZERO = 0; +static const double DZERO = 0; + +int *a; +int b; +long *c; + +/* Assertion that n is a constant zero: so the conditional expression + has type 'int *' instead of 'void *'. +*/ +#define ASSERT_NPC(n) (b = *(1 ? a : (n))) +/* Assertion that n is not a constant zero: so the conditional + expressions has type 'void *' instead of 'int *'. +*/ +#define ASSERT_NOT_NPC(n) (c = (1 ? a : (void *)(__SIZE_TYPE__)(n))) + +void +foo (void) +{ + ASSERT_NPC (0); + ASSERT_NOT_NPC (ZERO); + ASSERT_NPC (0 + 0); + ASSERT_NOT_NPC (ZERO + 0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */ + ASSERT_NOT_NPC (ZERO + ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */ + ASSERT_NPC (+0); + ASSERT_NOT_NPC (+ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */ + ASSERT_NPC (-0); + ASSERT_NOT_NPC (-ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */ + ASSERT_NPC ((char) 0); + ASSERT_NOT_NPC ((char) ZERO); + ASSERT_NPC ((int) 0); + ASSERT_NOT_NPC ((int) ZERO); + ASSERT_NPC ((int) 0.0); + ASSERT_NOT_NPC ((int) DZERO); + ASSERT_NOT_NPC ((int) +0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */ + ASSERT_NOT_NPC ((int) (0.0+0.0)); /* { dg-bogus "incompatible" "bogus null pointer constant" } */ + ASSERT_NOT_NPC ((int) (double)0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */ +} -- cgit v1.2.3