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/const-elim-1.c | 48 +++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/const-elim-1.c (limited to 'gcc/testsuite/gcc.dg/const-elim-1.c') diff --git a/gcc/testsuite/gcc.dg/const-elim-1.c b/gcc/testsuite/gcc.dg/const-elim-1.c new file mode 100644 index 000000000..c9c57a278 --- /dev/null +++ b/gcc/testsuite/gcc.dg/const-elim-1.c @@ -0,0 +1,48 @@ +/* Verify that constants in memory, referenced only by dead code, + are not emitted to the object file. + FIXME: Not presently possible to apply -pedantic to code with + complex constants in it. The __extension__ should shut up the + warning but doesn't. (Hard to fix -- the lexer is not aware of + the parser's state.) */ + +/* { dg-do compile } */ +/* { dg-options "-O2 -std=c99" } */ +/* { dg-final { scan-assembler-not "L\\\$?C\[^A-Z\]" } } */ + +#define I (__extension__ 1.0iF) + +struct S { int a; double b[2]; void *c; }; + +extern void use_str(const char *); +extern void use_S(const struct S *); +extern void use_cplx(__complex__ double); + +static inline int +returns_23(void) { return 23; } + +void +test1(void) +{ + if (returns_23() == 23) + return; + + use_str("waltz, nymph, for quick jigs vex bud"); + use_S(&(const struct S){12, {3.1415, 2.1828}, 0 }); + use_cplx(3.1415 + 2.1828*I); +} + +void +test2(void) +{ + const char *str = "pack my box with five dozen liquor jugs"; + const struct S S = { 23, { 1.414, 1.618 }, 0 }; + const __complex__ double cplx = 1.414 + 1.618*I; + + if (returns_23() == 23) + return; + + use_str(str); + use_S(&S); + use_cplx(cplx); +} + -- cgit v1.2.3