diff options
Diffstat (limited to 'packages/gcc/13.2.0/0019-aarch64-Tweak-aarch64_save-restore_callee_saves.patch')
| -rw-r--r-- | packages/gcc/13.2.0/0019-aarch64-Tweak-aarch64_save-restore_callee_saves.patch | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/packages/gcc/13.2.0/0019-aarch64-Tweak-aarch64_save-restore_callee_saves.patch b/packages/gcc/13.2.0/0019-aarch64-Tweak-aarch64_save-restore_callee_saves.patch deleted file mode 100644 index ebe3fe89..00000000 --- a/packages/gcc/13.2.0/0019-aarch64-Tweak-aarch64_save-restore_callee_saves.patch +++ /dev/null @@ -1,225 +0,0 @@ -From 86fa43e9fe4a8bf954f2919f07cbe3646d1d1df3 Mon Sep 17 00:00:00 2001 -From: Richard Sandiford <richard.sandiford@arm.com> -Date: Tue, 12 Sep 2023 16:07:14 +0100 -Subject: [PATCH 19/32] aarch64: Tweak aarch64_save/restore_callee_saves - -aarch64_save_callee_saves and aarch64_restore_callee_saves took -a parameter called start_offset that gives the offset of the -bottom of the saved register area from the current stack pointer. -However, it's more convenient for later patches if we use the -bottom of the entire frame as the reference point, rather than -the bottom of the saved registers. - -Doing that removes the need for the callee_offset field. -Other than that, this is not a win on its own. It only really -makes sense in combination with the follow-on patches. - -gcc/ - * config/aarch64/aarch64.h (aarch64_frame::callee_offset): Delete. - * config/aarch64/aarch64.cc (aarch64_layout_frame): Remove - callee_offset handling. - (aarch64_save_callee_saves): Replace the start_offset parameter - with a bytes_below_sp parameter. - (aarch64_restore_callee_saves): Likewise. - (aarch64_expand_prologue): Update accordingly. - (aarch64_expand_epilogue): Likewise. ---- - gcc/config/aarch64/aarch64.cc | 56 +++++++++++++++++------------------ - gcc/config/aarch64/aarch64.h | 4 --- - 2 files changed, 28 insertions(+), 32 deletions(-) - -diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc -index a3f7aabcc594..46ae5cf76735 100644 ---- a/gcc/config/aarch64/aarch64.cc -+++ b/gcc/config/aarch64/aarch64.cc -@@ -8604,7 +8604,6 @@ aarch64_layout_frame (void) - frame.final_adjust = 0; - frame.callee_adjust = 0; - frame.sve_callee_adjust = 0; -- frame.callee_offset = 0; - - frame.wb_pop_candidate1 = frame.wb_push_candidate1; - frame.wb_pop_candidate2 = frame.wb_push_candidate2; -@@ -8672,7 +8671,6 @@ aarch64_layout_frame (void) - stp reg1, reg2, [sp, bytes_below_saved_regs] - stp reg3, reg4, [sp, bytes_below_saved_regs + 16] */ - frame.initial_adjust = frame.frame_size; -- frame.callee_offset = const_below_saved_regs; - } - else if (saves_below_hard_fp_p - && known_eq (frame.saved_regs_size, -@@ -9073,12 +9071,13 @@ aarch64_add_cfa_expression (rtx_insn *insn, rtx reg, - } - - /* Emit code to save the callee-saved registers from register number START -- to LIMIT to the stack at the location starting at offset START_OFFSET, -- skipping any write-back candidates if SKIP_WB is true. HARD_FP_VALID_P -- is true if the hard frame pointer has been set up. */ -+ to LIMIT to the stack. The stack pointer is currently BYTES_BELOW_SP -+ bytes above the bottom of the static frame. Skip any write-back -+ candidates if SKIP_WB is true. HARD_FP_VALID_P is true if the hard -+ frame pointer has been set up. */ - - static void --aarch64_save_callee_saves (poly_int64 start_offset, -+aarch64_save_callee_saves (poly_int64 bytes_below_sp, - unsigned start, unsigned limit, bool skip_wb, - bool hard_fp_valid_p) - { -@@ -9106,7 +9105,9 @@ aarch64_save_callee_saves (poly_int64 start_offset, - - machine_mode mode = aarch64_reg_save_mode (regno); - reg = gen_rtx_REG (mode, regno); -- offset = start_offset + frame.reg_offset[regno]; -+ offset = (frame.reg_offset[regno] -+ + frame.bytes_below_saved_regs -+ - bytes_below_sp); - rtx base_rtx = stack_pointer_rtx; - poly_int64 sp_offset = offset; - -@@ -9117,9 +9118,7 @@ aarch64_save_callee_saves (poly_int64 start_offset, - else if (GP_REGNUM_P (regno) - && (!offset.is_constant (&const_offset) || const_offset >= 512)) - { -- gcc_assert (known_eq (start_offset, 0)); -- poly_int64 fp_offset -- = frame.below_hard_fp_saved_regs_size; -+ poly_int64 fp_offset = frame.bytes_below_hard_fp - bytes_below_sp; - if (hard_fp_valid_p) - base_rtx = hard_frame_pointer_rtx; - else -@@ -9183,12 +9182,13 @@ aarch64_save_callee_saves (poly_int64 start_offset, - } - - /* Emit code to restore the callee registers from register number START -- up to and including LIMIT. Restore from the stack offset START_OFFSET, -- skipping any write-back candidates if SKIP_WB is true. Write the -- appropriate REG_CFA_RESTORE notes into CFI_OPS. */ -+ up to and including LIMIT. The stack pointer is currently BYTES_BELOW_SP -+ bytes above the bottom of the static frame. Skip any write-back -+ candidates if SKIP_WB is true. Write the appropriate REG_CFA_RESTORE -+ notes into CFI_OPS. */ - - static void --aarch64_restore_callee_saves (poly_int64 start_offset, unsigned start, -+aarch64_restore_callee_saves (poly_int64 bytes_below_sp, unsigned start, - unsigned limit, bool skip_wb, rtx *cfi_ops) - { - aarch64_frame &frame = cfun->machine->frame; -@@ -9214,7 +9214,9 @@ aarch64_restore_callee_saves (poly_int64 start_offset, unsigned start, - - machine_mode mode = aarch64_reg_save_mode (regno); - reg = gen_rtx_REG (mode, regno); -- offset = start_offset + frame.reg_offset[regno]; -+ offset = (frame.reg_offset[regno] -+ + frame.bytes_below_saved_regs -+ - bytes_below_sp); - rtx base_rtx = stack_pointer_rtx; - if (mode == VNx2DImode && BYTES_BIG_ENDIAN) - aarch64_adjust_sve_callee_save_base (mode, base_rtx, anchor_reg, -@@ -9990,8 +9992,6 @@ aarch64_expand_prologue (void) - HOST_WIDE_INT callee_adjust = frame.callee_adjust; - poly_int64 final_adjust = frame.final_adjust; - poly_int64 sve_callee_adjust = frame.sve_callee_adjust; -- poly_int64 below_hard_fp_saved_regs_size -- = frame.below_hard_fp_saved_regs_size; - unsigned reg1 = frame.wb_push_candidate1; - unsigned reg2 = frame.wb_push_candidate2; - bool emit_frame_chain = frame.emit_frame_chain; -@@ -10067,8 +10067,8 @@ aarch64_expand_prologue (void) - - frame.hard_fp_offset); - gcc_assert (known_ge (chain_offset, 0)); - -- /* The offset of the bottom of the save area from the current SP. */ -- poly_int64 saved_regs_offset = chain_offset - below_hard_fp_saved_regs_size; -+ /* The offset of the current SP from the bottom of the static frame. */ -+ poly_int64 bytes_below_sp = frame_size - initial_adjust - callee_adjust; - - if (emit_frame_chain) - { -@@ -10076,7 +10076,7 @@ aarch64_expand_prologue (void) - { - reg1 = R29_REGNUM; - reg2 = R30_REGNUM; -- aarch64_save_callee_saves (saved_regs_offset, reg1, reg2, -+ aarch64_save_callee_saves (bytes_below_sp, reg1, reg2, - false, false); - } - else -@@ -10116,7 +10116,7 @@ aarch64_expand_prologue (void) - emit_insn (gen_stack_tie (stack_pointer_rtx, hard_frame_pointer_rtx)); - } - -- aarch64_save_callee_saves (saved_regs_offset, R0_REGNUM, R30_REGNUM, -+ aarch64_save_callee_saves (bytes_below_sp, R0_REGNUM, R30_REGNUM, - callee_adjust != 0 || emit_frame_chain, - emit_frame_chain); - if (maybe_ne (sve_callee_adjust, 0)) -@@ -10126,16 +10126,17 @@ aarch64_expand_prologue (void) - aarch64_allocate_and_probe_stack_space (tmp1_rtx, tmp0_rtx, - sve_callee_adjust, - !frame_pointer_needed, false); -- saved_regs_offset += sve_callee_adjust; -+ bytes_below_sp -= sve_callee_adjust; - } -- aarch64_save_callee_saves (saved_regs_offset, P0_REGNUM, P15_REGNUM, -+ aarch64_save_callee_saves (bytes_below_sp, P0_REGNUM, P15_REGNUM, - false, emit_frame_chain); -- aarch64_save_callee_saves (saved_regs_offset, V0_REGNUM, V31_REGNUM, -+ aarch64_save_callee_saves (bytes_below_sp, V0_REGNUM, V31_REGNUM, - callee_adjust != 0 || emit_frame_chain, - emit_frame_chain); - - /* We may need to probe the final adjustment if it is larger than the guard - that is assumed by the called. */ -+ gcc_assert (known_eq (bytes_below_sp, final_adjust)); - aarch64_allocate_and_probe_stack_space (tmp1_rtx, tmp0_rtx, final_adjust, - !frame_pointer_needed, true); - } -@@ -10170,7 +10171,6 @@ aarch64_expand_epilogue (bool for_sibcall) - poly_int64 initial_adjust = frame.initial_adjust; - HOST_WIDE_INT callee_adjust = frame.callee_adjust; - poly_int64 final_adjust = frame.final_adjust; -- poly_int64 callee_offset = frame.callee_offset; - poly_int64 sve_callee_adjust = frame.sve_callee_adjust; - poly_int64 bytes_below_hard_fp = frame.bytes_below_hard_fp; - unsigned reg1 = frame.wb_pop_candidate1; -@@ -10240,9 +10240,9 @@ aarch64_expand_epilogue (bool for_sibcall) - - /* Restore the vector registers before the predicate registers, - so that we can use P4 as a temporary for big-endian SVE frames. */ -- aarch64_restore_callee_saves (callee_offset, V0_REGNUM, V31_REGNUM, -+ aarch64_restore_callee_saves (final_adjust, V0_REGNUM, V31_REGNUM, - callee_adjust != 0, &cfi_ops); -- aarch64_restore_callee_saves (callee_offset, P0_REGNUM, P15_REGNUM, -+ aarch64_restore_callee_saves (final_adjust, P0_REGNUM, P15_REGNUM, - false, &cfi_ops); - if (maybe_ne (sve_callee_adjust, 0)) - aarch64_add_sp (NULL_RTX, NULL_RTX, sve_callee_adjust, true); -@@ -10250,7 +10250,7 @@ aarch64_expand_epilogue (bool for_sibcall) - /* When shadow call stack is enabled, the scs_pop in the epilogue will - restore x30, we don't need to restore x30 again in the traditional - way. */ -- aarch64_restore_callee_saves (callee_offset - sve_callee_adjust, -+ aarch64_restore_callee_saves (final_adjust + sve_callee_adjust, - R0_REGNUM, last_gpr, - callee_adjust != 0, &cfi_ops); - -diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h -index 4263d29d29d7..fd820b1be4eb 100644 ---- a/gcc/config/aarch64/aarch64.h -+++ b/gcc/config/aarch64/aarch64.h -@@ -813,10 +813,6 @@ struct GTY (()) aarch64_frame - It is zero when no push is used. */ - HOST_WIDE_INT callee_adjust; - -- /* The offset from SP to the callee-save registers after initial_adjust. -- It may be non-zero if no push is used (ie. callee_adjust == 0). */ -- poly_int64 callee_offset; -- - /* The size of the stack adjustment before saving or after restoring - SVE registers. */ - poly_int64 sve_callee_adjust; --- -2.42.0 - |