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/compare4.c | 49 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/compare4.c (limited to 'gcc/testsuite/gcc.dg/compare4.c') diff --git a/gcc/testsuite/gcc.dg/compare4.c b/gcc/testsuite/gcc.dg/compare4.c new file mode 100644 index 000000000..e5dad4d1e --- /dev/null +++ b/gcc/testsuite/gcc.dg/compare4.c @@ -0,0 +1,49 @@ +/* Test for a bogus warning on comparison between signed and unsigned. + Origin: Kaveh R. Ghazi 5/13/2001. */ + +/* { dg-do compile } */ +/* { dg-options "-fshow-column -Wsign-compare -fstrict-overflow" } */ + +extern void bar(void); + +int foo(int x, int y, unsigned u) +{ + /* A COMPOUND_EXPR is non-negative if the last element is known to + be non-negative. */ + if (u < (bar(), -1)) /*{ dg-warning "9:signed and unsigned" "COMPOUND_EXPR" }*/ + return x; + if (u < (bar(), 10)) + return x; + if ((bar(), 10) < u) + return x; + if (u < (x ? (bar(),bar(),bar(),bar(),x==y) : 10)) + return x; + if ((x ? 10 : (bar(),bar(),bar(),bar(),x==y)) < u) + return x; + + /* Test an ABS_EXPR, which is by definition non-negative when + -fstrict-overflow is used. */ + if (u < __builtin_abs(x)) + return x; + if (__builtin_abs(x) < u) + return x; + if (u < (x ? __builtin_abs(x) : 10)) + return x; + if ((x ? 10: __builtin_abs(x)) < u) + return x; + + /* A MODIFY_EXPR is non-negative if the new value is known to be + non-negative. */ + if (u < (x = -1)) /* { dg-warning "9:signed and unsigned" "MODIFY_EXPR" } */ + return x; + if (u < (x = 10)) + return x; + if ((x = 10) < u) + return x; + if (u < (x = (y ? (x==y) : 10))) + return x; + if ((x = (y ? 10 : (x==y))) < u) + return x; + + return 0; +} -- cgit v1.2.3