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gc: Use simple cast instead of union to silence compiler

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stijn 2014-06-19 13:53:15 +02:00
parent 8abcf666cb
commit de5ce6d461
1 changed files with 1 additions and 9 deletions
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10
unix/gccollect.c
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@ -144,15 +144,7 @@ void gc_collect(void) {
regs_t regs; regs_t regs;
gc_helper_get_regs(regs); gc_helper_get_regs(regs);
// GC stack (and regs because we captured them) // GC stack (and regs because we captured them)
#ifdef __MINGW32__ void **regs_ptr = (void**)(void*)&regs;
// The Mingw cross-compiler on Travis complains
// 'warning: dereferencing type-punned pointer will break strict-aliasing rules'
// when casting &regs to void** directly so use a union.
union { regs_t *r; void **ptr; } cast_regs = { &regs };
void **regs_ptr = cast_regs.ptr;
#else
void **regs_ptr = (void**)&regs;
#endif
gc_collect_root(regs_ptr, ((machine_uint_t)stack_top - (machine_uint_t)&regs) / sizeof(machine_uint_t)); gc_collect_root(regs_ptr, ((machine_uint_t)stack_top - (machine_uint_t)&regs) / sizeof(machine_uint_t));
gc_collect_end(); gc_collect_end();