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re PR other/50925 ([avr] ICE at spill_failure, at reload1.c:2118)

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PR target/50925
	* config/avr/avr-protos.h (avr_hard_regno_nregs): Declare.
	* config/avr/avr.c (avr_can_eliminate): Simplify.
	(avr_initial_elimination_offset): Likewise.
	(avr_prologue_setup_frame): Use hard_frame_pointer_rtx.
	(expand_epilogue): Likewise.
	(avr_legitimize_address): Gut.
	(avr_legitimize_reload_address): Use hard_frame_pointer_rtx.
	(avr_hard_regno_nregs): New.
	(avr_hard_regno_ok): Allow only Pmode for arg and frame_pointers.
	(avr_regno_mode_code_ok_for_base_b): Handle arg and frame pointers.
	* config/avr/avr.h (FIXED_REGISTERS): Adjust arg pointer,
	add soft frame pointer.
	(CALL_USED_REGISTERS): Likewise.
	(REG_CLASS_CONTENTS): Likewise.
	(REGISTER_NAMES): Likewise.
	(HARD_REGNO_NREGS): Use avr_hard_regno_nregs.
	(HARD_FRAME_POINTER_REGNUM): New.
	(FRAME_POINTER_REGNUM): Use soft frame pointer.
	(ELIMINABLE_REGS): Eliminate from the soft frame pointer,
	remove the HARD_FRAME_POINTER self-elimination.


Co-Authored-By: Denis Chertykov <chertykov@gmail.com>

From-SVN: r183136
This commit is contained in:
Richard Henderson 2012-01-12 10:29:54 -08:00 committed by Denis Chertykov
parent 4643a68ec2
commit 105b876e55
4 changed files with 123 additions and 107 deletions
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25
gcc/ChangeLog
View File

@ -1,3 +1,28 @@
2012-01-09 Richard Henderson <rth@redhat.com>
Denis Chertykov <chertykov@gmail.com>
PR target/50925
* config/avr/avr-protos.h (avr_hard_regno_nregs): Declare.
* config/avr/avr.c (avr_can_eliminate): Simplify.
(avr_initial_elimination_offset): Likewise.
(avr_prologue_setup_frame): Use hard_frame_pointer_rtx.
(expand_epilogue): Likewise.
(avr_legitimize_address): Gut.
(avr_legitimize_reload_address): Use hard_frame_pointer_rtx.
(avr_hard_regno_nregs): New.
(avr_hard_regno_ok): Allow only Pmode for arg and frame_pointers.
(avr_regno_mode_code_ok_for_base_b): Handle arg and frame pointers.
* config/avr/avr.h (FIXED_REGISTERS): Adjust arg pointer,
add soft frame pointer.
(CALL_USED_REGISTERS): Likewise.
(REG_CLASS_CONTENTS): Likewise.
(REGISTER_NAMES): Likewise.
(HARD_REGNO_NREGS): Use avr_hard_regno_nregs.
(HARD_FRAME_POINTER_REGNUM): New.
(FRAME_POINTER_REGNUM): Use soft frame pointer.
(ELIMINABLE_REGS): Eliminate from the soft frame pointer,
remove the HARD_FRAME_POINTER self-elimination.
2012-01-12 Georg-Johann Lay <avr@gjlay.de>
PR target/51756

1
gcc/config/avr/avr-protos.h
View File

@ -109,6 +109,7 @@ extern int avr_jump_mode (rtx x, rtx insn);
extern int test_hard_reg_class (enum reg_class rclass, rtx x);
extern int jump_over_one_insn_p (rtx insn, rtx dest);
extern int avr_hard_regno_nregs (int regno, enum machine_mode mode);
extern int avr_hard_regno_mode_ok (int regno, enum machine_mode mode);
extern void final_prescan_insn (rtx insn, rtx *operand, int num_operands);
extern int avr_simplify_comparison_p (enum machine_mode mode,

104
gcc/config/avr/avr.c
View File

@ -686,31 +686,28 @@ avr_regs_to_save (HARD_REG_SET *set)
/* Return true if register FROM can be eliminated via register TO. */
static bool
avr_can_eliminate (const int from, const int to)
avr_can_eliminate (int from ATTRIBUTE_UNUSED, int to)
{
return ((from == ARG_POINTER_REGNUM && to == FRAME_POINTER_REGNUM)
|| (frame_pointer_needed && to == FRAME_POINTER_REGNUM)
|| ((from == FRAME_POINTER_REGNUM
|| from == FRAME_POINTER_REGNUM + 1)
&& !frame_pointer_needed));
return to == HARD_FRAME_POINTER_REGNUM;
}
/* Compute offset between arg_pointer and frame_pointer. */
int
avr_initial_elimination_offset (int from, int to)
avr_initial_elimination_offset (int from, int to ATTRIBUTE_UNUSED)
{
if (from == FRAME_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
return 0;
else
int offset = 0;
if (from == ARG_POINTER_REGNUM)
{
int offset = frame_pointer_needed ? 2 : 0;
int avr_pc_size = AVR_HAVE_EIJMP_EICALL ? 3 : 2;
offset += AVR_HAVE_EIJMP_EICALL ? 3 : 2;
offset += frame_pointer_needed ? 2 : 0;
offset += avr_regs_to_save (NULL);
return (get_frame_size () + avr_outgoing_args_size()
+ avr_pc_size + 1 + offset);
offset += get_frame_size ();
offset += 1; /* post-dec stack space */
}
return offset;
}
/* Actual start of frame is virtual_stack_vars_rtx this is offset from
@ -902,12 +899,12 @@ avr_prologue_setup_frame (HOST_WIDE_INT size, HARD_REG_SET set)
notes to the front. Thus we build them in the reverse order of
how we want dwarf2out to process them. */
/* The function does always set frame_pointer_rtx, but whether that
/* The function does always set hard_frame_pointer_rtx, but whether that
is going to be permanent in the function is frame_pointer_needed. */
add_reg_note (insn, REG_CFA_ADJUST_CFA,
gen_rtx_SET (VOIDmode, (frame_pointer_needed
? frame_pointer_rtx
? hard_frame_pointer_rtx
: stack_pointer_rtx),
plus_constant (stack_pointer_rtx,
-(size + live_seq))));
@ -952,7 +949,7 @@ avr_prologue_setup_frame (HOST_WIDE_INT size, HARD_REG_SET set)
if (frame_pointer_needed
&& size == 0)
{
insn = emit_move_insn (frame_pointer_rtx, stack_pointer_rtx);
insn = emit_move_insn (hard_frame_pointer_rtx, stack_pointer_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
}
@ -987,7 +984,7 @@ avr_prologue_setup_frame (HOST_WIDE_INT size, HARD_REG_SET set)
|| !current_function_is_leaf);
fp = my_fp = (frame_pointer_needed
? frame_pointer_rtx
? hard_frame_pointer_rtx
: gen_rtx_REG (Pmode, REG_X));
if (AVR_HAVE_8BIT_SP)
@ -995,7 +992,7 @@ avr_prologue_setup_frame (HOST_WIDE_INT size, HARD_REG_SET set)
/* The high byte (r29) does not change:
Prefer SUBI (1 cycle) over ABIW (2 cycles, same size). */
my_fp = all_regs_rtx[FRAME_POINTER_REGNUM];
my_fp = all_regs_rtx[HARD_FRAME_POINTER_REGNUM];
}
/************ Method 1: Adjust frame pointer ************/
@ -1260,13 +1257,13 @@ expand_epilogue (bool sibcall_p)
if (!frame_pointer_needed)
{
emit_move_insn (frame_pointer_rtx, stack_pointer_rtx);
emit_move_insn (hard_frame_pointer_rtx, stack_pointer_rtx);
}
if (size)
{
emit_move_insn (frame_pointer_rtx,
plus_constant (frame_pointer_rtx, size));
emit_move_insn (hard_frame_pointer_rtx,
plus_constant (hard_frame_pointer_rtx, size));
}
emit_insn (gen_epilogue_restores (gen_int_mode (live_seq, HImode)));
@ -1285,7 +1282,7 @@ expand_epilogue (bool sibcall_p)
|| !current_function_is_leaf);
fp = my_fp = (frame_pointer_needed
? frame_pointer_rtx
? hard_frame_pointer_rtx
: gen_rtx_REG (Pmode, REG_X));
if (AVR_HAVE_8BIT_SP)
@ -1293,7 +1290,7 @@ expand_epilogue (bool sibcall_p)
/* The high byte (r29) does not change:
Prefer SUBI (1 cycle) over SBIW (2 cycles). */
my_fp = all_regs_rtx[FRAME_POINTER_REGNUM];
my_fp = all_regs_rtx[HARD_FRAME_POINTER_REGNUM];
}
/********** Method 1: Adjust fp register **********/
@ -1534,37 +1531,8 @@ avr_legitimate_address_p (enum machine_mode mode, rtx x, bool strict)
memory address for an operand of mode MODE */
static rtx
avr_legitimize_address (rtx x, rtx oldx, enum machine_mode mode)
avr_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED, enum machine_mode mode)
{
bool big_offset_p = false;
x = oldx;
if (GET_CODE (oldx) == PLUS
&& REG_P (XEXP (oldx, 0)))
{
if (REG_P (XEXP (oldx, 1)))
x = force_reg (GET_MODE (oldx), oldx);
else if (CONST_INT_P (XEXP (oldx, 1)))
{
int offs = INTVAL (XEXP (oldx, 1));
if (frame_pointer_rtx != XEXP (oldx, 0)
&& offs > MAX_LD_OFFSET (mode))
{
big_offset_p = true;
x = force_reg (GET_MODE (oldx), oldx);
}
}
}
if (avr_log.legitimize_address)
{
avr_edump ("\n%?: mode=%m\n %r\n", mode, oldx);
if (x != oldx)
avr_edump (" %s --> %r\n", big_offset_p ? "(big offset)" : "", x);
}
return x;
}
@ -1634,7 +1602,7 @@ avr_legitimize_reload_address (rtx *px, enum machine_mode mode,
}
}
else if (! (frame_pointer_needed
&& XEXP (x, 0) == frame_pointer_rtx))
&& XEXP (x, 0) == hard_frame_pointer_rtx))
{
push_reload (x, NULL_RTX, px, NULL,
POINTER_REGS, GET_MODE (x), VOIDmode, 0, 0,
@ -8366,6 +8334,19 @@ extra_constraint_Q (rtx x)
return ok;
}
/* Returns the number of registers required to hold a value of MODE. */
int
avr_hard_regno_nregs (int regno, enum machine_mode mode)
{
/* The fake registers are designed to hold exactly a pointer. */
if (regno == ARG_POINTER_REGNUM || regno == FRAME_POINTER_REGNUM)
return 1;
return (GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
}
/* Convert condition code CONDITION to the valid AVR condition code. */
RTX_CODE
@ -8789,6 +8770,10 @@ jump_over_one_insn_p (rtx insn, rtx dest)
int
avr_hard_regno_mode_ok (int regno, enum machine_mode mode)
{
/* The fake registers are designed to hold exactly a pointer. */
if (regno == ARG_POINTER_REGNUM || regno == FRAME_POINTER_REGNUM)
return mode == Pmode;
/* NOTE: 8-bit values must not be disallowed for R28 or R29.
Disallowing QI et al. in these regs might lead to code like
(set (subreg:QI (reg:HI 28) n) ...)
@ -8812,7 +8797,6 @@ avr_hard_regno_mode_ok (int regno, enum machine_mode mode)
return 0;
/* All modes larger than 8 bits should start in an even register. */
return !(regno & 1);
}
@ -8872,7 +8856,8 @@ avr_regno_mode_code_ok_for_base_p (int regno,
&& (regno == REG_X
|| regno == REG_Y
|| regno == REG_Z
|| regno == ARG_POINTER_REGNUM))
|| regno == ARG_POINTER_REGNUM
|| regno == FRAME_POINTER_REGNUM))
{
ok = true;
}
@ -8883,7 +8868,8 @@ avr_regno_mode_code_ok_for_base_p (int regno,
if (regno == REG_X
|| regno == REG_Y
|| regno == REG_Z
|| regno == ARG_POINTER_REGNUM)
|| regno == ARG_POINTER_REGNUM
|| regno == FRAME_POINTER_REGNUM)
{
ok = true;
}

100
gcc/config/avr/avr.h
View File

@ -231,45 +231,47 @@ enum
#define FIRST_PSEUDO_REGISTER 36
#define FIXED_REGISTERS {\
1,1,/* r0 r1 */\
0,0,/* r2 r3 */\
0,0,/* r4 r5 */\
0,0,/* r6 r7 */\
0,0,/* r8 r9 */\
0,0,/* r10 r11 */\
0,0,/* r12 r13 */\
0,0,/* r14 r15 */\
0,0,/* r16 r17 */\
0,0,/* r18 r19 */\
0,0,/* r20 r21 */\
0,0,/* r22 r23 */\
0,0,/* r24 r25 */\
0,0,/* r26 r27 */\
0,0,/* r28 r29 */\
0,0,/* r30 r31 */\
1,1,/* STACK */\
1,1 /* arg pointer */ }
#define FIXED_REGISTERS { \
1,1,/* r0 r1 */ \
0,0,/* r2 r3 */ \
0,0,/* r4 r5 */ \
0,0,/* r6 r7 */ \
0,0,/* r8 r9 */ \
0,0,/* r10 r11 */ \
0,0,/* r12 r13 */ \
0,0,/* r14 r15 */ \
0,0,/* r16 r17 */ \
0,0,/* r18 r19 */ \
0,0,/* r20 r21 */ \
0,0,/* r22 r23 */ \
0,0,/* r24 r25 */ \
0,0,/* r26 r27 */ \
0,0,/* r28 r29 */ \
0,0,/* r30 r31 */ \
1,1,/* STACK */ \
1, /* arg pointer */ \
1 /* frame pointer */ }
#define CALL_USED_REGISTERS { \
1,1,/* r0 r1 */ \
0,0,/* r2 r3 */ \
0,0,/* r4 r5 */ \
0,0,/* r6 r7 */ \
0,0,/* r8 r9 */ \
0,0,/* r10 r11 */ \
0,0,/* r12 r13 */ \
0,0,/* r14 r15 */ \
0,0,/* r16 r17 */ \
1,1,/* r18 r19 */ \
1,1,/* r20 r21 */ \
1,1,/* r22 r23 */ \
1,1,/* r24 r25 */ \
1,1,/* r26 r27 */ \
0,0,/* r28 r29 */ \
1,1,/* r30 r31 */ \
1,1,/* STACK */ \
1,1 /* arg pointer */ }
0,0,/* r2 r3 */ \
0,0,/* r4 r5 */ \
0,0,/* r6 r7 */ \
0,0,/* r8 r9 */ \
0,0,/* r10 r11 */ \
0,0,/* r12 r13 */ \
0,0,/* r14 r15 */ \
0,0,/* r16 r17 */ \
1,1,/* r18 r19 */ \
1,1,/* r20 r21 */ \
1,1,/* r22 r23 */ \
1,1,/* r24 r25 */ \
1,1,/* r26 r27 */ \
0,0,/* r28 r29 */ \
1,1,/* r30 r31 */ \
1,1,/* STACK */ \
1, /* arg pointer */ \
1 /* frame pointer */ }
#define REG_ALLOC_ORDER { \
24,25, \
@ -287,7 +289,7 @@ enum
#define ADJUST_REG_ALLOC_ORDER order_regs_for_local_alloc ()
#define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
#define HARD_REGNO_NREGS(REGNO, MODE) avr_hard_regno_nregs(REGNO, MODE)
#define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
@ -337,17 +339,17 @@ enum reg_class {
{3 << REG_Z,0x00000000}, /* POINTER_Z_REGS, r30 - r31 */ \
{0x00000000,0x00000003}, /* STACK_REG, STACK */ \
{(3 << REG_Y) | (3 << REG_Z), \
0x00000000}, /* BASE_POINTER_REGS, r28 - r31 */ \
0x0000000c}, /* BASE_POINTER_REGS, r28 - r31,ap,fp */ \
{(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z), \
0x00000000}, /* POINTER_REGS, r26 - r31 */ \
0x0000000c}, /* POINTER_REGS, r26 - r31 */ \
{(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W), \
0x00000000}, /* ADDW_REGS, r24 - r31 */ \
{0x00ff0000,0x00000000}, /* SIMPLE_LD_REGS r16 - r23 */ \
{(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16), \
0x00000000}, /* LD_REGS, r16 - r31 */ \
0x0000000c}, /* LD_REGS, r16 - r31 */ \
{0x0000ffff,0x00000000}, /* NO_LD_REGS r0 - r15 */ \
{0xffffffff,0x00000000}, /* GENERAL_REGS, r0 - r31 */ \
{0xffffffff,0x00000003} /* ALL_REGS */ \
{0xffffffff,0x0000000c}, /* GENERAL_REGS, r0 - r31 */ \
{0xffffffff,0x0000000f} /* ALL_REGS */ \
}
#define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
@ -378,18 +380,20 @@ enum reg_class {
#define STACK_POINTER_REGNUM 32
#define FRAME_POINTER_REGNUM REG_Y
#define HARD_FRAME_POINTER_REGNUM REG_Y
#define ARG_POINTER_REGNUM 34
#define FRAME_POINTER_REGNUM 35
#define STATIC_CHAIN_REGNUM 2
#define ELIMINABLE_REGS { \
{ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
{ ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \
{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
{ FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }}
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
OFFSET = avr_initial_elimination_offset (FROM, TO)
#define RETURN_ADDR_RTX(count, tem) avr_return_addr_rtx (count, tem)
@ -493,7 +497,7 @@ typedef struct avr_args {
"r8","r9","r10","r11","r12","r13","r14","r15", \
"r16","r17","r18","r19","r20","r21","r22","r23", \
"r24","r25","r26","r27","r28","r29","r30","r31", \
"__SP_L__","__SP_H__","argL","argH"}
"__SP_L__","__SP_H__","ap","fp"}
#define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)