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(globalize_reg): New function. 

(init_reg_sets_1): Don't handle global regs here.

From-SVN: r6371
This commit is contained in:
Richard Kenner 1994-01-10 19:16:27 -05:00
parent b0c3841605
commit 614f68e2af
1 changed files with 30 additions and 11 deletions
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41
gcc/regclass.c
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@ -1,5 +1,5 @@
/* Compute register class preferences for pseudo-registers.
Copyright (C) 1987, 1988, 1991, 1992, 1993 Free Software Foundation, Inc.
Copyright (C) 1987, 88, 91, 92, 93, 1994 Free Software Foundation, Inc.
This file is part of GNU CC.
@ -361,16 +361,6 @@ init_reg_sets_1 ()
CONDITIONAL_REGISTER_USAGE;
#endif
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
if (global_regs[i])
{
if (call_used_regs[i] && ! fixed_regs[i])
warning ("call-clobbered register used for global register variable");
fixed_regs[i] = 1;
/* Prevent saving/restoring of this reg. */
call_used_regs[i] = 1;
}
/* Initialize "constant" tables. */
CLEAR_HARD_REG_SET (fixed_reg_set);
@ -434,6 +424,35 @@ fix_register (name, fixed, call_used)
warning ("unknown register name: %s", name);
}
}
/* Mark register number I as global. */
void
globalize_reg (i)
int i;
{
if (global_regs[i])
{
warning ("register used for two global register variables");
return;
}
if (call_used_regs[i] && ! fixed_regs[i])
warning ("call-clobbered register used for global register variable");
global_regs[i] = 1;
/* If already fixed, nothing else to do. */
if (fixed_regs[i])
return;
fixed_regs[i] = call_used_regs[i] = call_fixed_regs[i] = 1;
n_non_fixed_regs--;
SET_HARD_REG_BIT (fixed_reg_set, i);
SET_HARD_REG_BIT (call_used_reg_set, i);
SET_HARD_REG_BIT (call_fixed_reg_set, i);
}
/* Now the data and code for the `regclass' pass, which happens
just before local-alloc. */