| Message ID | COL101-W5693171BB9D477C959CA33E6D70@phx.gbl |
|---|---|
| State | New |
| Headers | show |
--- /Users/jay/src/orig/gcc-4.5.0/libiberty/cp-demangle.c 2010-03-22 13:38:35.000000000 -0700 +++ /Users/jay/src/gcc-4.5.0/libiberty/cp-demangle.c 2010-06-09 09:00:09.000000000 -0700 @@ -4764,7 +4764,7 @@ } type; struct d_info di; - struct demangle_component *dc; + struct demangle_component *dc = { 0 }; int status; if (mangled[0] == '_' && mangled[1] == 'Z')
/home/jay/src/gcc-4.5.0/libiberty/cp-demangle.c: In function ‘d_demangle_callback’: /home/jay/src/gcc-4.5.0/libiberty/cp-demangle.c:4767: warning: ‘dc’ may be used uninitialized in this function jay@plin:~/obj/gcc45$ gcc -v Using built-in specs. Target: powerpc-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.3.2-1.1' --with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --disable-softfloat --enable-secureplt --enable-targets=powerpc-linux,powerpc64-linux --with-cpu=default32 --with-long-double-128 --enable-checking=release --build=powerpc-linux-gnu --host=powerpc-linux-gnu --target=powerpc-linux-gnu Thread model: posix gcc version 4.3.2 (Debian 4.3.2-1.1) jay@plin:~/obj/gcc45$ uname -a Linux plin 2.6.26-2-powerpc #1 Thu Feb 11 01:36:51 UTC 2010 ppc GNU/Linux The warning appears to be false: enum { DCT_TYPE, DCT_MANGLED, DCT_GLOBAL_CTORS, DCT_GLOBAL_DTORS } type; struct demangle_component *dc; ... if ... type = DCT_MANGLED; else if ... type = ... ? DCT_GLOBAL_CTORS : DCT_GLOBAL_DTORS; else ... type = DCT_TYPE; ... switch (type) { case DCT_TYPE: dc = ... break; case DCT_MANGLED: dc = ... break; case DCT_GLOBAL_CTORS: case DCT_GLOBAL_DTORS: ... dc = ... break; } Nevertheless: jbook2:~ jay$ diff -u /Users/jay/src/orig/gcc-4.5.0/libiberty/cp-demangle.c /Users/jay/src/gcc-4.5.0/libiberty/cp-demangle.c Appears same in gcc trunk. Optimization at least with better/newer compiler should remove the initialization but I didn't check. - Jay