procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

arm.c (arm_size_return_regs): New.

Browse source 
2005-05-13  Josh Conner  <jconner@apple.com>

	* config/arm/arm.c (arm_size_return_regs): New.
	(thumb_unexpanded_epilogue): replace in-line calculation
	of return registers with call to arm_size_return_regs.
	(use_return_insn): Include test of which registers are
	being used to hold return values, to accommodate
	vector return values.

From-SVN: r99679
This commit is contained in:
Josh Conner 2005-05-13 21:13:17 +00:00 • committed by Paul Brook
parent 9c309ac9a4
commit 4f5dfed0dc
2 changed files with 30 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
gcc/ChangeLog
View file

@ -1,3 +1,12 @@
2005-05-13 Josh Conner <jconner@apple.com>
* config/arm/arm.c (arm_size_return_regs): New.
(thumb_unexpanded_epilogue): replace in-line calculation
of return registers with call to arm_size_return_regs.
(use_return_insn): Include test of which registers are
being used to hold return values, to accommodate
vector return values.
2005-05-11 Aldy Hernandez <aldyh@redhat.com>
* config/rs6000/sysv4.opt (mlittle): Handle.

31
gcc/config/arm/arm.c
View file

@ -73,6 +73,7 @@ static int thumb_far_jump_used_p (void);
static bool thumb_force_lr_save (void);
static int const_ok_for_op (HOST_WIDE_INT, enum rtx_code);
static rtx emit_sfm (int, int);
static int arm_size_return_regs (void);
#ifndef AOF_ASSEMBLER
static bool arm_assemble_integer (rtx, unsigned int, int);
#endif
@ -1465,9 +1466,11 @@ use_return_insn (int iscond, rtx sibling)
if (!call_used_regs[3])
return 0;
/* ... that it isn't being used for a return value (always true
until we implement return-in-regs), or for a tail-call
argument ... */
/* ... that it isn't being used for a return value ... */
if (arm_size_return_regs () >= (4 * UNITS_PER_WORD))
return 0;
/* ... or for a tail-call argument ... */
if (sibling)
{
gcc_assert (GET_CODE (sibling) == CALL_INSN);
@ -9851,6 +9854,20 @@ emit_multi_reg_push (unsigned long mask)
return par;
}
/* Calculate the size of the return value that is passed in registers. */
static int
arm_size_return_regs (void)
{
enum machine_mode mode;
if (current_function_return_rtx != 0)
mode = GET_MODE (current_function_return_rtx);
else
mode = DECL_MODE (DECL_RESULT (current_function_decl));
return GET_MODE_SIZE (mode);
}
static rtx
emit_sfm (int base_reg, int count)
{
@ -12920,13 +12937,7 @@ thumb_unexpanded_epilogue (void)
This is more reliable that examining regs_ever_live[] because that
will be set if the register is ever used in the function, not just if
the register is used to hold a return value. */
if (current_function_return_rtx != 0)
mode = GET_MODE (current_function_return_rtx);
else
mode = DECL_MODE (DECL_RESULT (current_function_decl));
size = GET_MODE_SIZE (mode);
size = arm_size_return_regs ();
/* The prolog may have pushed some high registers to use as
work registers. e.g. the testsuite file: