> Some pieces of code create a temporary REG or MEM and only fill it > in later when they're testing the cost of a particular rtx. This patch > makes sure that even the dummy REG or MEM is valid, rather than force > the gen_* code to handle garbage values. > > > gcc/ > * caller-save.c (init_caller_save): Use word_mode and > FIRST_PSEUDO_REGISTER when creating temporary rtxes. > * expr.c (init_expr_target): Likewise. > * ira.c (setup_prohibited_mode_move_regs): Likewise. > * postreload.c (reload_cse_regs_1): Likewise.
Isn't LAST_VIRTUAL_REGISTER + 1 the canonical regno to be used in this case? -- Eric Botcazou
