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Commit 88437f39 by Chung-Ju Wu Committed by Chung-Ju Wu
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[NDS32] Refine the implementation and consider CFA restore information for stack v3push/v3pop. 

	* config/nds32/nds32.c (nds32_gen_stack_v3push): Rename to ...
	(nds32_emit_stack_v3push): ... this.
	(nds32_gen_stack_v3pop): Rename to ...
	(nds32_emit_stack_v3pop): ... this and consider CFA restore
	information.

From-SVN: r214852
parent 4e9a2848
Showing with 57 additions and 47 deletions
gcc/ChangeLog
2014-09-03 Chung-Ju Wu <jasonwucj@gmail.com>
* config/nds32/nds32.c (nds32_gen_stack_v3push): Rename to ...
(nds32_emit_stack_v3push): ... this.
(nds32_gen_stack_v3pop): Rename to ...
(nds32_emit_stack_v3pop): ... this and consider CFA restore
information.
2014-09-03 Chung-Ju Wu <jasonwucj@gmail.com>
* config/nds32/nds32.c (nds32_gen_stack_push_multiple): Rename to ...
(nds32_emit_stack_push_multiple): ... this.
(nds32_gen_stack_pop_multiple): Rename to ...
gcc/config/nds32/nds32.c
......@@ -648,11 +648,11 @@ nds32_emit_stack_pop_multiple (rtx Rb, rtx Re, rtx En4)
The overall concept are:
"push registers to memory",
"adjust stack pointer". */
static rtx
nds32_gen_stack_v3push (rtx Rb,
rtx Re,
rtx En4 ATTRIBUTE_UNUSED,
rtx imm8u)
static void
nds32_emit_stack_v3push (rtx Rb,
rtx Re,
rtx En4 ATTRIBUTE_UNUSED,
rtx imm8u)
{
int regno;
int num_use_regs;
......@@ -668,8 +668,7 @@ nds32_gen_stack_v3push (rtx Rb,
/* We need to provide a customized rtx which contains
necessary information for data analysis,
so we create a parallel rtx like this:
(parallel [
(set (mem (plus (reg:SI SP_REGNUM) (const_int -32)))
(parallel [(set (mem (plus (reg:SI SP_REGNUM) (const_int -32)))
(reg:SI Rb))
(set (mem (plus (reg:SI SP_REGNUM) (const_int -28)))
(reg:SI Rb+1))
......@@ -761,7 +760,12 @@ nds32_gen_stack_v3push (rtx Rb,
XVECEXP (parallel_insn, 0, par_index) = adjust_sp_rtx;
RTX_FRAME_RELATED_P (adjust_sp_rtx) = 1;
return parallel_insn;
parallel_insn = emit_insn (parallel_insn);
/* The insn rtx 'parallel_insn' will change frame layout.
We need to use RTX_FRAME_RELATED_P so that GCC is able to
generate CFI (Call Frame Information) stuff. */
RTX_FRAME_RELATED_P (parallel_insn) = 1;
}
/* Function to create a parallel rtx pattern
......@@ -769,11 +773,11 @@ nds32_gen_stack_v3push (rtx Rb,
The overall concept are:
"pop registers from memory",
"adjust stack pointer". */
static rtx
nds32_gen_stack_v3pop (rtx Rb,
rtx Re,
rtx En4 ATTRIBUTE_UNUSED,
rtx imm8u)
static void
nds32_emit_stack_v3pop (rtx Rb,
rtx Re,
rtx En4 ATTRIBUTE_UNUSED,
rtx imm8u)
{
int regno;
int num_use_regs;
......@@ -785,6 +789,7 @@ nds32_gen_stack_v3pop (rtx Rb,
rtx pop_rtx;
rtx adjust_sp_rtx;
rtx parallel_insn;
rtx dwarf = NULL_RTX;
/* We need to provide a customized rtx which contains
necessary information for data analysis,
......@@ -835,6 +840,8 @@ nds32_gen_stack_v3pop (rtx Rb,
RTX_FRAME_RELATED_P (pop_rtx) = 1;
offset = offset + 4;
par_index++;
dwarf = alloc_reg_note (REG_CFA_RESTORE, reg, dwarf);
}
/* Create (set fp mem). */
......@@ -847,6 +854,8 @@ nds32_gen_stack_v3pop (rtx Rb,
RTX_FRAME_RELATED_P (pop_rtx) = 1;
offset = offset + 4;
par_index++;
dwarf = alloc_reg_note (REG_CFA_RESTORE, reg, dwarf);
/* Create (set gp mem). */
reg = gen_rtx_REG (SImode, GP_REGNUM);
mem = gen_frame_mem (SImode, plus_constant (Pmode,
......@@ -857,6 +866,8 @@ nds32_gen_stack_v3pop (rtx Rb,
RTX_FRAME_RELATED_P (pop_rtx) = 1;
offset = offset + 4;
par_index++;
dwarf = alloc_reg_note (REG_CFA_RESTORE, reg, dwarf);
/* Create (set lp mem ). */
reg = gen_rtx_REG (SImode, LP_REGNUM);
mem = gen_frame_mem (SImode, plus_constant (Pmode,
......@@ -867,6 +878,7 @@ nds32_gen_stack_v3pop (rtx Rb,
RTX_FRAME_RELATED_P (pop_rtx) = 1;
offset = offset + 4;
par_index++;
dwarf = alloc_reg_note (REG_CFA_RESTORE, reg, dwarf);
/* Create (set sp sp+x+imm8u). */
......@@ -878,9 +890,19 @@ nds32_gen_stack_v3pop (rtx Rb,
stack_pointer_rtx,
offset + INTVAL (imm8u)));
XVECEXP (parallel_insn, 0, par_index) = adjust_sp_rtx;
RTX_FRAME_RELATED_P (adjust_sp_rtx) = 1;
return parallel_insn;
/* Tell gcc we adjust SP in this insn. */
dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, copy_rtx (adjust_sp_rtx), dwarf);
parallel_insn = emit_insn (parallel_insn);
/* The insn rtx 'parallel_insn' will change frame layout.
We need to use RTX_FRAME_RELATED_P so that GCC is able to
generate CFI (Call Frame Information) stuff. */
RTX_FRAME_RELATED_P (parallel_insn) = 1;
/* Add CFI info by manual. */
REG_NOTES (parallel_insn) = dwarf;
}
/* Function that may creates more instructions
......@@ -2885,18 +2907,11 @@ nds32_expand_prologue_v3push (void)
{
/* We can use 'push25 Re,imm8u'. */
/* push_insn = gen_stack_v3push(last_regno, sp_adjust),
/* nds32_emit_stack_v3push(last_regno, sp_adjust),
the pattern 'stack_v3push' is implemented in nds32.md.
The (const_int 14) means v3push always push { $fp $gp $lp }. */
push_insn = nds32_gen_stack_v3push (Rb, Re,
GEN_INT (14), GEN_INT (sp_adjust));
/* emit rtx into instructions list and receive INSN rtx form */
push_insn = emit_insn (push_insn);
/* The insn rtx 'push_insn' will change frame layout.
We need to use RTX_FRAME_RELATED_P so that GCC is able to
generate CFI (Call Frame Information) stuff. */
RTX_FRAME_RELATED_P (push_insn) = 1;
nds32_emit_stack_v3push (Rb, Re,
GEN_INT (14), GEN_INT (sp_adjust));
/* Check frame_pointer_needed to see
if we shall emit fp adjustment instruction. */
......@@ -2929,18 +2944,11 @@ nds32_expand_prologue_v3push (void)
/* We have to use 'push25 Re,0' and
expand one more instruction to adjust $sp later. */
/* push_insn = gen_stack_v3push(last_regno, sp_adjust),
/* nds32_emit_stack_v3push(last_regno, sp_adjust),
the pattern 'stack_v3push' is implemented in nds32.md.
The (const_int 14) means v3push always push { $fp $gp $lp }. */
push_insn = nds32_gen_stack_v3push (Rb, Re,
GEN_INT (14), GEN_INT (0));
/* Emit rtx into instructions list and receive INSN rtx form. */
push_insn = emit_insn (push_insn);
/* The insn rtx 'push_insn' will change frame layout.
We need to use RTX_FRAME_RELATED_P so that GCC is able to
generate CFI (Call Frame Information) stuff. */
RTX_FRAME_RELATED_P (push_insn) = 1;
nds32_emit_stack_v3push (Rb, Re,
GEN_INT (14), GEN_INT (0));
/* Check frame_pointer_needed to see
if we shall emit fp adjustment instruction. */
......@@ -3047,14 +3055,11 @@ nds32_expand_epilogue_v3pop (void)
{
/* We can use 'pop25 Re,imm8u'. */
/* pop_insn = gen_stack_v3pop(last_regno, sp_adjust),
/* nds32_emit_stack_v3pop(last_regno, sp_adjust),
the pattern 'stack_v3pop' is implementad in nds32.md.
The (const_int 14) means v3pop always pop { $fp $gp $lp }. */
pop_insn = nds32_gen_stack_v3pop (Rb, Re,
GEN_INT (14), GEN_INT (sp_adjust));
/* Emit pop instruction. */
emit_insn (pop_insn);
nds32_emit_stack_v3pop (Rb, Re,
GEN_INT (14), GEN_INT (sp_adjust));
}
else
{
......@@ -3111,14 +3116,11 @@ nds32_expand_epilogue_v3pop (void)
}
}
/* pop_insn = gen_stack_v3pop(last_regno, sp_adjust),
/* nds32_emit_stack_v3pop(last_regno, sp_adjust),
the pattern 'stack_v3pop' is implementad in nds32.md. */
/* The (const_int 14) means v3pop always pop { $fp $gp $lp }. */
pop_insn = nds32_gen_stack_v3pop (Rb, Re,
GEN_INT (14), GEN_INT (0));
/* Emit pop instruction. */
emit_insn (pop_insn);
nds32_emit_stack_v3pop (Rb, Re,
GEN_INT (14), GEN_INT (0));
}
}
......
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