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gcc/gcc49-aarch64-unwind-opt.patch

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2014-08-08 Richard Henderson <rth@redhat.com>
* config/aarch64/aarch64.c (aarch64_save_or_restore_fprs): Add
cfi_ops argument, for restore put REG_CFA_RESTORE notes into
*cfi_ops rather than on individual insns. Cleanup.
(aarch64_save_or_restore_callee_save_registers): Likewise.
(aarch64_expand_prologue): Adjust caller.
(aarch64_expand_epilogue): Likewise. Cleanup. Emit queued cfi_ops
on the stack restore insn.
--- gcc/config/aarch64/aarch64.c.jj 2014-07-08 17:38:17.398231989 +0200
+++ gcc/config/aarch64/aarch64.c 2014-08-13 10:02:45.599757706 +0200
@@ -1810,8 +1810,7 @@ aarch64_register_saved_on_entry (int reg
static void
aarch64_save_or_restore_fprs (int start_offset, int increment,
- bool restore, rtx base_rtx)
-
+ bool restore, rtx base_rtx, rtx *cfi_ops)
{
unsigned regno;
unsigned regno2;
@@ -1819,16 +1818,16 @@ aarch64_save_or_restore_fprs (int start_
rtx (*gen_mem_ref)(enum machine_mode, rtx)
= (frame_pointer_needed)? gen_frame_mem : gen_rtx_MEM;
-
for (regno = V0_REGNUM; regno <= V31_REGNUM; regno++)
{
if (aarch64_register_saved_on_entry (regno))
{
- rtx mem;
+ rtx mem, reg1;
mem = gen_mem_ref (DFmode,
plus_constant (Pmode,
base_rtx,
start_offset));
+ reg1 = gen_rtx_REG (DFmode, regno);
for (regno2 = regno + 1;
regno2 <= V31_REGNUM
@@ -1840,56 +1839,51 @@ aarch64_save_or_restore_fprs (int start_
if (regno2 <= V31_REGNUM &&
aarch64_register_saved_on_entry (regno2))
{
- rtx mem2;
+ rtx mem2, reg2;
/* Next highest register to be saved. */
mem2 = gen_mem_ref (DFmode,
plus_constant
(Pmode,
base_rtx,
start_offset + increment));
+ reg2 = gen_rtx_REG (DFmode, regno2);
+
if (restore == false)
{
- insn = emit_insn
- ( gen_store_pairdf (mem, gen_rtx_REG (DFmode, regno),
- mem2, gen_rtx_REG (DFmode, regno2)));
-
+ insn = emit_insn (gen_store_pairdf (mem, reg1, mem2, reg2));
+ /* The first part of a frame-related parallel insn
+ is always assumed to be relevant to the frame
+ calculations; subsequent parts, are only
+ frame-related if explicitly marked. */
+ RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0, 1)) = 1;
+ RTX_FRAME_RELATED_P (insn) = 1;
}
else
{
- insn = emit_insn
- ( gen_load_pairdf (gen_rtx_REG (DFmode, regno), mem,
- gen_rtx_REG (DFmode, regno2), mem2));
-
- add_reg_note (insn, REG_CFA_RESTORE,
- gen_rtx_REG (DFmode, regno));
- add_reg_note (insn, REG_CFA_RESTORE,
- gen_rtx_REG (DFmode, regno2));
+ emit_insn (gen_load_pairdf (reg1, mem, reg2, mem2));
+ *cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg1, *cfi_ops);
+ *cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg2, *cfi_ops);
}
- /* The first part of a frame-related parallel insn
- is always assumed to be relevant to the frame
- calculations; subsequent parts, are only
- frame-related if explicitly marked. */
- RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0, 1)) = 1;
regno = regno2;
start_offset += increment * 2;
}
else
{
if (restore == false)
- insn = emit_move_insn (mem, gen_rtx_REG (DFmode, regno));
+ {
+ insn = emit_move_insn (mem, reg1);
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
else
{
- insn = emit_move_insn (gen_rtx_REG (DFmode, regno), mem);
- add_reg_note (insn, REG_CFA_RESTORE,
- gen_rtx_REG (DImode, regno));
+ emit_move_insn (reg1, mem);
+ *cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg1, *cfi_ops);
}
start_offset += increment;
}
- RTX_FRAME_RELATED_P (insn) = 1;
}
}
-
}
@@ -1897,13 +1891,14 @@ aarch64_save_or_restore_fprs (int start_
restore's have to happen. */
static void
aarch64_save_or_restore_callee_save_registers (HOST_WIDE_INT offset,
- bool restore)
+ bool restore, rtx *cfi_ops)
{
rtx insn;
rtx base_rtx = stack_pointer_rtx;
HOST_WIDE_INT start_offset = offset;
HOST_WIDE_INT increment = UNITS_PER_WORD;
- rtx (*gen_mem_ref)(enum machine_mode, rtx) = (frame_pointer_needed)? gen_frame_mem : gen_rtx_MEM;
+ rtx (*gen_mem_ref)(enum machine_mode, rtx)
+ = (frame_pointer_needed)? gen_frame_mem : gen_rtx_MEM;
unsigned limit = (frame_pointer_needed)? R28_REGNUM: R30_REGNUM;
unsigned regno;
unsigned regno2;
@@ -1912,11 +1907,13 @@ aarch64_save_or_restore_callee_save_regi
{
if (aarch64_register_saved_on_entry (regno))
{
- rtx mem;
+ rtx mem, reg1;
+
mem = gen_mem_ref (Pmode,
plus_constant (Pmode,
base_rtx,
start_offset));
+ reg1 = gen_rtx_REG (DImode, regno);
for (regno2 = regno + 1;
regno2 <= limit
@@ -1928,56 +1925,54 @@ aarch64_save_or_restore_callee_save_regi
if (regno2 <= limit &&
aarch64_register_saved_on_entry (regno2))
{
- rtx mem2;
+ rtx mem2, reg2;
/* Next highest register to be saved. */
mem2 = gen_mem_ref (Pmode,
plus_constant
(Pmode,
base_rtx,
start_offset + increment));
+ reg2 = gen_rtx_REG (DImode, regno2);
+
if (restore == false)
{
- insn = emit_insn
- ( gen_store_pairdi (mem, gen_rtx_REG (DImode, regno),
- mem2, gen_rtx_REG (DImode, regno2)));
-
+ insn = emit_insn (gen_store_pairdi (mem, reg1, mem2, reg2));
+ /* The first part of a frame-related parallel insn
+ is always assumed to be relevant to the frame
+ calculations; subsequent parts, are only
+ frame-related if explicitly marked. */
+ RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0, 1)) = 1;
+ RTX_FRAME_RELATED_P (insn) = 1;
}
else
{
- insn = emit_insn
- ( gen_load_pairdi (gen_rtx_REG (DImode, regno), mem,
- gen_rtx_REG (DImode, regno2), mem2));
-
- add_reg_note (insn, REG_CFA_RESTORE, gen_rtx_REG (DImode, regno));
- add_reg_note (insn, REG_CFA_RESTORE, gen_rtx_REG (DImode, regno2));
+ emit_insn (gen_load_pairdi (reg1, mem, reg2, mem2));
+ *cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg1, *cfi_ops);
+ *cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg2, *cfi_ops);
}
- /* The first part of a frame-related parallel insn
- is always assumed to be relevant to the frame
- calculations; subsequent parts, are only
- frame-related if explicitly marked. */
- RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0,
- 1)) = 1;
regno = regno2;
start_offset += increment * 2;
}
else
{
if (restore == false)
- insn = emit_move_insn (mem, gen_rtx_REG (DImode, regno));
+ {
+ insn = emit_move_insn (mem, reg1);
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
else
{
- insn = emit_move_insn (gen_rtx_REG (DImode, regno), mem);
- add_reg_note (insn, REG_CFA_RESTORE, gen_rtx_REG (DImode, regno));
+ emit_move_insn (reg1, mem);
+ *cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg1, *cfi_ops);
}
start_offset += increment;
}
- RTX_FRAME_RELATED_P (insn) = 1;
}
}
- aarch64_save_or_restore_fprs (start_offset, increment, restore, base_rtx);
-
+ aarch64_save_or_restore_fprs (start_offset, increment, restore,
+ base_rtx, cfi_ops);
}
/* AArch64 stack frames generated by this compiler look like:
@@ -2179,7 +2174,7 @@ aarch64_expand_prologue (void)
}
aarch64_save_or_restore_callee_save_registers
- (fp_offset + cfun->machine->frame.hardfp_offset, 0);
+ (fp_offset + cfun->machine->frame.hardfp_offset, 0, NULL);
}
/* when offset >= 512,
@@ -2248,15 +2243,18 @@ aarch64_expand_epilogue (bool for_sibcal
insn = emit_insn (gen_add3_insn (stack_pointer_rtx,
hard_frame_pointer_rtx,
GEN_INT (- fp_offset)));
+ /* CFA should be calculated from the value of SP from now on. */
+ add_reg_note (insn, REG_CFA_ADJUST_CFA,
+ gen_rtx_SET (VOIDmode, stack_pointer_rtx,
+ plus_constant (Pmode, hard_frame_pointer_rtx,
+ -fp_offset)));
RTX_FRAME_RELATED_P (insn) = 1;
- /* As SP is set to (FP - fp_offset), according to the rules in
- dwarf2cfi.c:dwarf2out_frame_debug_expr, CFA should be calculated
- from the value of SP from now on. */
cfa_reg = stack_pointer_rtx;
}
+ rtx cfi_ops = NULL;
aarch64_save_or_restore_callee_save_registers
- (fp_offset + cfun->machine->frame.hardfp_offset, 1);
+ (fp_offset + cfun->machine->frame.hardfp_offset, 1, &cfi_ops);
/* Restore the frame pointer and lr if the frame pointer is needed. */
if (offset > 0)
@@ -2264,6 +2262,8 @@ aarch64_expand_epilogue (bool for_sibcal
if (frame_pointer_needed)
{
rtx mem_fp, mem_lr;
+ rtx reg_fp = hard_frame_pointer_rtx;
+ rtx reg_lr = gen_rtx_REG (DImode, LR_REGNUM);
if (fp_offset)
{
@@ -2276,52 +2276,36 @@ aarch64_expand_epilogue (bool for_sibcal
stack_pointer_rtx,
fp_offset
+ UNITS_PER_WORD));
- insn = emit_insn (gen_load_pairdi (hard_frame_pointer_rtx,
- mem_fp,
- gen_rtx_REG (DImode,
- LR_REGNUM),
- mem_lr));
+ emit_insn (gen_load_pairdi (reg_fp, mem_fp, reg_lr, mem_lr));
+
+ insn = emit_insn (gen_add2_insn (stack_pointer_rtx,
+ GEN_INT (offset)));
}
else
{
insn = emit_insn (gen_loadwb_pairdi_di
- (stack_pointer_rtx,
- stack_pointer_rtx,
- hard_frame_pointer_rtx,
- gen_rtx_REG (DImode, LR_REGNUM),
- GEN_INT (offset),
+ (stack_pointer_rtx, stack_pointer_rtx,
+ reg_fp, reg_lr, GEN_INT (offset),
GEN_INT (GET_MODE_SIZE (DImode) + offset)));
- RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0, 2)) = 1;
- add_reg_note (insn, REG_CFA_ADJUST_CFA,
- (gen_rtx_SET (Pmode, stack_pointer_rtx,
- plus_constant (Pmode, cfa_reg,
- offset))));
- }
-
- /* The first part of a frame-related parallel insn
- is always assumed to be relevant to the frame
- calculations; subsequent parts, are only
- frame-related if explicitly marked. */
- RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0, 1)) = 1;
- RTX_FRAME_RELATED_P (insn) = 1;
- add_reg_note (insn, REG_CFA_RESTORE, hard_frame_pointer_rtx);
- add_reg_note (insn, REG_CFA_RESTORE,
- gen_rtx_REG (DImode, LR_REGNUM));
-
- if (fp_offset)
- {
- insn = emit_insn (gen_add2_insn (stack_pointer_rtx,
- GEN_INT (offset)));
- RTX_FRAME_RELATED_P (insn) = 1;
}
+ cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg_fp, cfi_ops);
+ cfi_ops = alloc_reg_note (REG_CFA_RESTORE, reg_lr, cfi_ops);
}
else
{
insn = emit_insn (gen_add2_insn (stack_pointer_rtx,
GEN_INT (offset)));
- RTX_FRAME_RELATED_P (insn) = 1;
}
+ cfi_ops = alloc_reg_note (REG_CFA_ADJUST_CFA,
+ gen_rtx_SET (VOIDmode, stack_pointer_rtx,
+ plus_constant (Pmode, cfa_reg,
+ offset)),
+ cfi_ops);
+ REG_NOTES (insn) = cfi_ops;
+ RTX_FRAME_RELATED_P (insn) = 1;
}
+ else
+ gcc_assert (cfi_ops == NULL);
/* Stack adjustment for exception handler. */
if (crtl->calls_eh_return)
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