I just applied Intel C to a bootstrap build of GNU C version 4.4 snapshot 20080229.
The Intel compiler said ../../src/gcc-4.4-20080229/gcc/builtins.c(2868): remark #593: variable "val" was set but never used ../../src/gcc-4.4-20080229/gcc/builtins.c(5152): remark #593: variable "c" was set but never used ../../src/gcc-4.4-20080229/gcc/builtins.c(11777): remark #593: variable "dest" was set but never used ../../src/gcc-4.4-20080229/gcc/builtins.c(11777): remark #593: variable "flag" was set but never used ../../src/gcc-4.4-20080229/gcc/builtins.c(1195): remark #593: variable "apply_args_reg_offset" was set but never used I've just manually checked each of these five and I agree with the Intel C compiler. Suggest delete these four dead local variables and one dead static variable. -- Summary: builtins.c: 5 * set but not used Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dcb314 at hotmail dot com GCC host triplet: suse-linux-x86_64 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35505