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spu.h (STACK_SAVE_AREA): Use VOIDmode for SAVE_FUNCTION...
* spu.h (STACK_SAVE_AREA): Use VOIDmode for SAVE_FUNCTION, SImode for SAVE_NONLOCAL and Pmode for any other save level. * spu-protos.h (spu_restore_stack_block): Declare. * spu.md (save_stack_block): Remove. (restore_stack_block): Call spu_restore_stack_block. * spu.c (spu_restore_stack_block): New function. (spu_expand_epilogue): Remove old comment. Co-Authored-By: Ben Elliston <bje@au.ibm.com> From-SVN: r120633
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Sa Liu
Ben Elliston
parent
0b30ba3b6c
commit
e1f1d97f19
@ -1,3 +1,14 @@
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2007-01-10 Sa Liu <saliu@de.ibm.com>
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Ben Elliston <bje@au.ibm.com>
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* spu.h (STACK_SAVE_AREA): Use VOIDmode for SAVE_FUNCTION, SImode
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for SAVE_NONLOCAL and Pmode for any other save level.
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* spu-protos.h (spu_restore_stack_block): Declare.
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* spu.md (save_stack_block): Remove.
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(restore_stack_block): Call spu_restore_stack_block.
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* spu.c (spu_restore_stack_block): New function.
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(spu_expand_epilogue): Remove old comment.
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2007-01-09 Zdenek Dvorak <dvorakz@suse.cz>
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PR tree-optimization/30322
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@ -1,4 +1,4 @@
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/* Copyright (C) 2006 Free Software Foundation, Inc.
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/* Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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@ -78,6 +78,7 @@ extern rtx array_to_constant (enum machine_mode mode, unsigned char *arr);
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extern enum machine_mode spu_eh_return_filter_mode (void);
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extern void spu_allocate_stack (rtx op0, rtx op1);
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extern void spu_restore_stack_nonlocal (rtx op0, rtx op1);
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extern void spu_restore_stack_block (rtx op0, rtx op1);
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extern rtx spu_gen_subreg (enum machine_mode mode, rtx x);
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extern int spu_safe_dma(HOST_WIDE_INT channel);
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extern void spu_builtin_splats (rtx ops[]);
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@ -1,4 +1,4 @@
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/* Copyright (C) 2006 Free Software Foundation, Inc.
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/* Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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@ -1702,8 +1702,6 @@ spu_expand_epilogue (bool sibcall_p)
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if (total_size > 0)
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{
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if (current_function_calls_alloca)
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/* Load it from the back chain because our save_stack_block and
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restore_stack_block do nothing. */
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frame_emit_load (STACK_POINTER_REGNUM, sp_reg, 0);
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else
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frame_emit_add_imm (sp_reg, sp_reg, total_size, scratch_reg_0);
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@ -4306,6 +4304,32 @@ spu_init_builtins (void)
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}
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}
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void
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spu_restore_stack_block (rtx op0 ATTRIBUTE_UNUSED, rtx op1)
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{
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static unsigned char arr[16] =
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{ 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3 };
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rtx temp = gen_reg_rtx (Pmode);
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rtx temp2 = gen_reg_rtx (V4SImode);
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rtx temp3 = gen_reg_rtx (V4SImode);
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rtx pat = gen_reg_rtx (TImode);
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rtx sp = gen_rtx_REG (V4SImode, STACK_POINTER_REGNUM);
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emit_move_insn (pat, array_to_constant (TImode, arr));
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/* Restore the sp. */
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emit_move_insn (temp, op1);
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emit_move_insn (temp2, gen_frame_mem (V4SImode, stack_pointer_rtx));
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/* Compute available stack size for sp. */
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emit_insn (gen_subsi3 (temp, temp, stack_pointer_rtx));
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emit_insn (gen_shufb (temp3, temp, temp, pat));
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emit_insn (gen_addv4si3 (sp, sp, temp3));
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emit_move_insn (gen_frame_mem (V4SImode, stack_pointer_rtx), temp2);
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}
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int
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spu_safe_dma (HOST_WIDE_INT channel)
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{
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@ -96,7 +96,10 @@ extern const char *spu_fixed_range_string;
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#define MAX_FIXED_MODE_SIZE 128
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#define STACK_SAVEAREA_MODE(save_level) SImode
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#define STACK_SAVEAREA_MODE(save_level) \
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(save_level == SAVE_FUNCTION ? VOIDmode \
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: save_level == SAVE_NONLOCAL ? SImode \
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: Pmode)
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#define STACK_SIZE_MODE SImode
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@ -1,4 +1,4 @@
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;; Copyright (C) 2006 Free Software Foundation, Inc.
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;; Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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;; This file is free software; you can redistribute it and/or modify it under
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;; the terms of the GNU General Public License as published by the Free
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@ -3116,16 +3116,19 @@ selb\t%0,%4,%0,%3"
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"spu_allocate_stack (operands[0], operands[1]); DONE;")
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;; These patterns say how to save and restore the stack pointer. We need not
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;; save the stack pointer at function or block level since we are careful to
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;; preserve the backchain. Doing nothing at block level means the stack space
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;; is allocated until the end of the function. This is currently safe to do
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;; because gcc uses the frame pointer for the whole function, so the worst that
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;; happens is wasted stack space. That could be bad if a VLA is declared in a
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;; loop, because new space will be allocated every iteration, but users can
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;; work around that case. Ideally we could detect when we are in a loop and
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;; generate the more complicated code in that case.
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;; save the stack pointer at function level since we are careful to preserve
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;; the backchain.
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;;
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;; At block level the stack pointer is saved and restored, so that the
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;; stack space allocated within a block is deallocated when leaving
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;; block scope. By default, according to the SPU ABI, the stack
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;; pointer and available stack size are saved in a register. Upon
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;; restoration, the stack pointer is simply copied back, and the
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;; current available stack size is calculated against the restored
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;; stack pointer.
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;;
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;; For nonlocal gotos, we must save both the stack pointer and its
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;; For nonlocal gotos, we must save the stack pointer and its
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;; backchain and restore both. Note that in the nonlocal case, the
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;; save area is a memory location.
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@ -3141,19 +3144,15 @@ selb\t%0,%4,%0,%3"
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""
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"DONE;")
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(define_expand "save_stack_block"
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[(match_operand 0 "general_operand" "")
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(match_operand 1 "general_operand" "")]
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""
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"DONE; ")
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(define_expand "restore_stack_block"
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[(use (match_operand 0 "spu_reg_operand" ""))
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(set (match_dup 2) (match_dup 3))
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(set (match_dup 0) (match_operand 1 "spu_reg_operand" ""))
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(set (match_dup 3) (match_dup 2))]
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[(match_operand 0 "spu_reg_operand" "")
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(match_operand 1 "memory_operand" "")]
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""
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"DONE;")
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"
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{
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spu_restore_stack_block (operands[0], operands[1]);
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DONE;
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}")
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(define_expand "save_stack_nonlocal"
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[(match_operand 0 "memory_operand" "")
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