https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66819
--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> --- Author: hjl Date: Fri Jul 10 20:30:10 2015 New Revision: 225688 URL: https://gcc.gnu.org/viewcvs?rev=225688&root=gcc&view=rev Log: Allow indirect sibcall with register arguments Indirect sibcall with register arguments is OK when there is register available for argument passing. gcc/ PR target/66819 * config/i386/i386.c (ix86_function_ok_for_sibcall): Allow indirect sibcall with register arguments if register available for argument passing. (init_cumulative_args): Set cfun->machine->arg_reg_available to (cum->nregs > 0) or to true if function has a variable argument list. (function_arg_advance_32): Set cfun->machine->arg_reg_available to false if cum->nregs <= 0. * config/i386/i386.h (machine_function): Add arg_reg_available. gcc/testsuite/ PR target/66819 * gcc.target/i386/pr66819-1.c: New test. * gcc.target/i386/pr66819-2.c: Likewise. * gcc.target/i386/pr66819-3.c: Likewise. * gcc.target/i386/pr66819-4.c: Likewise. * gcc.target/i386/pr66819-5.c: Likewise. Added: trunk/gcc/testsuite/gcc.target/i386/pr66819-1.c trunk/gcc/testsuite/gcc.target/i386/pr66819-2.c trunk/gcc/testsuite/gcc.target/i386/pr66819-3.c trunk/gcc/testsuite/gcc.target/i386/pr66819-4.c trunk/gcc/testsuite/gcc.target/i386/pr66819-5.c Modified: trunk/gcc/ChangeLog trunk/gcc/config/i386/i386.c trunk/gcc/config/i386/i386.h trunk/gcc/testsuite/ChangeLog
