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cse.c (struct cse_reg_info): Add subreg_ticked.

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2002-10-10  Stuart Hastings  <stuart@apple.com>

	* cse.c (struct cse_reg_info): Add subreg_ticked.
	(SUBREG_TICKED): New.
	(get_cse_reg_info): Initialize SUBREG_TICKED.
	(mention_regs): Use it.
	(invalidate): Set SUBREG_TICKED.
	(invalidate_for_call): Likewise.
	(addr_affects_sp_p): Likewise.

From-SVN: r58035
This commit is contained in:
Stuart Hastings 2002-10-10 23:16:54 +00:00 committed by Geoffrey Keating
parent e89fe41c87
commit 46081bb341
3 changed files with 77 additions and 7 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2002-10-10 Stuart Hastings <stuart@apple.com>
* cse.c (struct cse_reg_info): Add subreg_ticked.
(SUBREG_TICKED): New.
(get_cse_reg_info): Initialize SUBREG_TICKED.
(mention_regs): Use it.
(invalidate): Set SUBREG_TICKED.
(invalidate_for_call): Likewise.
(addr_affects_sp_p): Likewise.
2002-10-10 Jakub Jelinek <jakub@redhat.com>
* config/i386/i386.md (tls_local_dynamic_base): Put pic reg

37
gcc/cse.c
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@ -316,6 +316,10 @@ struct cse_reg_info
reg_tick value, such expressions existing in the hash table are
invalid. */
int reg_in_table;
/* The SUBREG that was set when REG_TICK was last incremented. Set
to -1 if the last store was to the whole register, not a subreg. */
int subreg_ticked;
};
/* A free list of cse_reg_info entries. */
@ -514,6 +518,11 @@ struct table_elt
#define REG_IN_TABLE(N) ((GET_CSE_REG_INFO (N))->reg_in_table)
/* Get the SUBREG set at the last increment to REG_TICK (-1 if not a
SUBREG). */
#define SUBREG_TICKED(N) ((GET_CSE_REG_INFO (N))->subreg_ticked)
/* Get the quantity number for REG. */
#define REG_QTY(N) ((GET_CSE_REG_INFO (N))->reg_qty)
@ -957,6 +966,7 @@ get_cse_reg_info (regno)
/* Initialize it. */
p->reg_tick = 1;
p->reg_in_table = -1;
p->subreg_ticked = -1;
p->reg_qty = regno;
p->regno = regno;
p->next = cse_reg_info_used_list;
@ -1191,6 +1201,7 @@ mention_regs (x)
remove_invalid_refs (i);
REG_IN_TABLE (i) = REG_TICK (i);
SUBREG_TICKED (i) = -1;
}
return 0;
@ -1206,17 +1217,20 @@ mention_regs (x)
if (REG_IN_TABLE (i) >= 0 && REG_IN_TABLE (i) != REG_TICK (i))
{
/* If reg_tick has been incremented more than once since
reg_in_table was last set, that means that the entire
register has been set before, so discard anything memorized
for the entire register, including all SUBREG expressions. */
if (REG_IN_TABLE (i) != REG_TICK (i) - 1)
/* If REG_IN_TABLE (i) differs from REG_TICK (i) by one, and
the last store to this register really stored into this
subreg, then remove the memory of this subreg.
Otherwise, remove any memory of the entire register and
all its subregs from the table. */
if (REG_TICK (i) - REG_IN_TABLE (i) > 1
|| SUBREG_TICKED (i) != SUBREG_REG (x))
remove_invalid_refs (i);
else
remove_invalid_subreg_refs (i, SUBREG_BYTE (x), GET_MODE (x));
}
REG_IN_TABLE (i) = REG_TICK (i);
SUBREG_TICKED (i) = SUBREG_REG (x);
return 0;
}
@ -1861,6 +1875,7 @@ invalidate (x, full_mode)
delete_reg_equiv (regno);
REG_TICK (regno)++;
SUBREG_TICKED (regno) = -1;
if (regno >= FIRST_PSEUDO_REGISTER)
{
@ -1888,6 +1903,7 @@ invalidate (x, full_mode)
CLEAR_HARD_REG_BIT (hard_regs_in_table, rn);
delete_reg_equiv (rn);
REG_TICK (rn)++;
SUBREG_TICKED (rn) = -1;
}
if (in_table)
@ -2093,7 +2109,10 @@ invalidate_for_call ()
{
delete_reg_equiv (regno);
if (REG_TICK (regno) >= 0)
REG_TICK (regno)++;
{
REG_TICK (regno)++;
SUBREG_TICKED (regno) = -1;
}
in_table |= (TEST_HARD_REG_BIT (hard_regs_in_table, regno) != 0);
}
@ -6407,7 +6426,11 @@ addr_affects_sp_p (addr)
&& REGNO (XEXP (addr, 0)) == STACK_POINTER_REGNUM)
{
if (REG_TICK (STACK_POINTER_REGNUM) >= 0)
REG_TICK (STACK_POINTER_REGNUM)++;
{
REG_TICK (STACK_POINTER_REGNUM)++;
/* Is it possible to use a subreg of SP? */
SUBREG_TICKED (STACK_POINTER_REGNUM) = -1;
}
/* This should be *very* rare. */
if (TEST_HARD_REG_BIT (hard_regs_in_table, STACK_POINTER_REGNUM))

37
gcc/testsuite/gcc.c-torture/execute/20021010-2.c Normal file
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@ -0,0 +1,37 @@
/* cse.c failure on x86 target.
Contributed by Stuart Hastings 10 Oct 2002 <stuart@apple.com> */
#include <stdlib.h>
typedef signed short SInt16;
typedef struct {
SInt16 minx;
SInt16 maxx;
SInt16 miny;
SInt16 maxy;
} IOGBounds;
int expectedwidth = 50;
unsigned int *global_vramPtr = (unsigned int *)0xa000;
IOGBounds global_bounds = { 100, 150, 100, 150 };
IOGBounds global_saveRect = { 75, 175, 75, 175 };
main()
{
unsigned int *vramPtr;
int width;
IOGBounds saveRect = global_saveRect;
IOGBounds bounds = global_bounds;
if (saveRect.minx < bounds.minx) saveRect.minx = bounds.minx;
if (saveRect.maxx > bounds.maxx) saveRect.maxx = bounds.maxx;
vramPtr = global_vramPtr + (saveRect.miny - bounds.miny) ;
width = saveRect.maxx - saveRect.minx;
if (width != expectedwidth)
abort ();
exit (0);
}