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caller-save update part 2
- To: jh at suse dot cz, gcc-patches at gcc dot gnu dot org, rth at cygnus dot com, patches at x86-64 dot org
- Subject: caller-save update part 2
- From: Jan Hubicka <jh at suse dot cz>
- Date: Fri, 2 Mar 2001 12:06:01 +0100
Hi
This patch updates caller-save to use proper modes for allocating stack space.
This is needed for proper stack alignment in i386.c
Honza
Fri Mar 2 12:04:15 CET 2001 Jan Hubicka <jh@suse.cz>
* caller-save.c (setup_save_areas): Allocate areas in the proper mode.
Index: caller-save.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/caller-save.c,v
retrieving revision 1.35
diff -c -3 -p -r1.35 caller-save.c
*** caller-save.c 2001/02/28 21:32:54 1.35
--- caller-save.c 2001/03/02 11:04:03
*************** setup_save_areas ()
*** 270,276 ****
--- 270,279 ----
int i, j, k;
unsigned int r;
HARD_REG_SET hard_regs_used;
+ enum machine_mode save_mode [FIRST_PSEUDO_REGISTER];
+ for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+ save_mode [i] = VOIDmode;
/* Allocate space in the save area for the largest multi-register
pseudos first, then work backwards to single register
pseudos. */
*************** setup_save_areas ()
*** 281,288 ****
if (reg_renumber[i] >= 0 && REG_N_CALLS_CROSSED (i) > 0)
{
unsigned int regno = reg_renumber[i];
! unsigned int endregno
! = regno + HARD_REGNO_NREGS (regno, GET_MODE (regno_reg_rtx[i]));
for (r = regno; r < endregno; r++)
if (call_used_regs[r])
--- 284,298 ----
if (reg_renumber[i] >= 0 && REG_N_CALLS_CROSSED (i) > 0)
{
unsigned int regno = reg_renumber[i];
! unsigned int nregs = HARD_REGNO_NREGS (regno,
! GET_MODE (regno_reg_rtx[i]));
! unsigned int endregno = regno + nregs;
! enum machine_mode mode;
!
! mode = HARD_REGNO_CALLER_SAVE_MODE
! (regno, nregs, PSEUDO_REGNO_MODE (i));
! if (GET_MODE_BITSIZE (mode) > GET_MODE_BITSIZE (save_mode[regno]))
! save_mode[regno] = mode;
for (r = regno; r < endregno; r++)
if (call_used_regs[r])
*************** setup_save_areas ()
*** 297,302 ****
--- 307,313 ----
for (j = MOVE_MAX_WORDS; j > 0; j--)
{
int do_save = 1;
+ enum machine_mode mode;
/* If no mode exists for this size, try another. Also break out
if we have already saved this hard register. */
*************** setup_save_areas ()
*** 322,331 ****
if (! do_save)
continue;
/* We have found an acceptable mode to store in. */
regno_save_mem[i][j]
! = assign_stack_local (regno_save_mode[i][j],
! GET_MODE_SIZE (regno_save_mode[i][j]), 0);
/* Setup single word save area just in case... */
for (k = 0; k < j; k++)
--- 333,347 ----
if (! do_save)
continue;
+ mode = regno_save_mode[i][j];
+ if (save_mode [i] != VOIDmode
+ && save_mode [i] != mode
+ && j == HARD_REGNO_NREGS (i, save_mode [i]))
+ mode = save_mode[i];
+
/* We have found an acceptable mode to store in. */
regno_save_mem[i][j]
! = assign_stack_local (mode, GET_MODE_SIZE (mode), 0);
/* Setup single word save area just in case... */
for (k = 0; k < j; k++)
*************** save_call_clobbered_regs ()
*** 417,423 ****
int r = reg_renumber[regno];
int nregs;
! if (r >= 0)
{
enum machine_mode mode;
--- 433,439 ----
int r = reg_renumber[regno];
int nregs;
! if (r > 0)
{
enum machine_mode mode;