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/g++.dg/warn/null4.C | 55 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 gcc/testsuite/g++.dg/warn/null4.C (limited to 'gcc/testsuite/g++.dg/warn/null4.C') diff --git a/gcc/testsuite/g++.dg/warn/null4.C b/gcc/testsuite/g++.dg/warn/null4.C new file mode 100644 index 000000000..6aa4a097f --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/null4.C @@ -0,0 +1,55 @@ +// PR c++/24745 : warnings for NULL constant. +// { dg-do compile } +// { dg-options "-Wpointer-arith -Wconversion " } + +#include + +int foo (void) +{ + if (NULL == 1) return -1; // { dg-warning "NULL used in arithmetic" } + if (NULL > NULL) return -1; // { dg-warning "NULL used in arithmetic" } + if (NULL < NULL) return -1; // { dg-warning "NULL used in arithmetic" } + if (NULL >= 0) return -1; // { dg-warning "NULL used in arithmetic" } + if (NULL <= 0) return -1; // { dg-warning "NULL used in arithmetic" } + // Adding to the NULL pointer, which has no specific type, should + // result in a warning; the type of the resulting expression is + // actually "int", not a pointer type. + if (NULL + 1) return -1; // { dg-warning "NULL used in arithmetic" } + if (1 + NULL) return -1; // { dg-warning "NULL used in arithmetic" } + return 0; +} + +int *ip; + +struct S {}; +typedef int S::*SPD; +typedef void (S::*SPF)(void); +SPD spd; +SPF spf; + +int bar (void) +{ + if (NULL) return -1; + if (!NULL) return -1; + if (!NULL == 1) return -1; + if (NULL || NULL) return -1; + if (!NULL && NULL) return -1; + if (NULL == NULL) return -1; + if (NULL != NULL) return -1; + if (NULL == 0) return -1; + if (NULL != 0) return -1; + // Subtraction of pointers is vaild, so using NULL is OK. + if (ip - NULL) return -1; + if (NULL - NULL) return -1; + // Comparing NULL with a pointer-to-member is OK. + if (NULL == spd) return -1; + if (spd == NULL) return -1; + if (NULL != spd) return -1; + if (spd != NULL) return -1; + if (NULL == spf) return -1; + if (spf == NULL) return -1; + if (NULL != spf) return -1; + if (spf != NULL) return -1; + + return 0; +} -- cgit v1.2.3