diff options
Diffstat (limited to 'gcc/config/sparc/sparc.c')
| -rw-r--r-- | gcc/config/sparc/sparc.c | 54 |
1 files changed, 10 insertions, 44 deletions
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c index 3560ed988ba..2ab08fde5d6 100644 --- a/gcc/config/sparc/sparc.c +++ b/gcc/config/sparc/sparc.c @@ -318,8 +318,7 @@ static int set_extends (rtx); static void emit_pic_helper (void); static void load_pic_register (bool); static int save_or_restore_regs (int, int, rtx, int, int); -static void emit_save_regs (void); -static void emit_restore_regs (void); +static void emit_save_or_restore_regs (int); static void sparc_asm_function_prologue (FILE *, HOST_WIDE_INT); static void sparc_asm_function_epilogue (FILE *, HOST_WIDE_INT); #ifdef OBJECT_FORMAT_ELF @@ -3508,10 +3507,9 @@ sparc_compute_frame_size (HOST_WIDE_INT size, int leaf_function_p) /* Make sure nothing can clobber our register windows. If a SAVE must be done, or there is a stack-local variable, - the register window area must be allocated. - ??? For v8 we apparently need an additional 8 bytes of reserved space. */ + the register window area must be allocated. */ if (! leaf_function_p || size > 0) - actual_fsize += (16 * UNITS_PER_WORD) + (TARGET_ARCH64 ? 0 : 8); + actual_fsize += FIRST_PARM_OFFSET (current_function_decl); return SPARC_STACK_ALIGN (actual_fsize); } @@ -3623,14 +3621,14 @@ save_or_restore_regs (int low, int high, rtx base, int offset, int action) /* Emit code to save call-saved registers. */ static void -emit_save_regs (void) +emit_save_or_restore_regs (int action) { HOST_WIDE_INT offset; rtx base; offset = frame_base_offset - apparent_fsize; - if (offset < -4096 || offset + num_gfregs * 4 > 4096) + if (offset < -4096 || offset + num_gfregs * 4 > 4095) { /* ??? This might be optimized a little as %g1 might already have a value close enough that a single add insn will do. */ @@ -3648,34 +3646,8 @@ emit_save_regs (void) else base = frame_base_reg; - offset = save_or_restore_regs (0, 8, base, offset, SORR_SAVE); - save_or_restore_regs (32, TARGET_V9 ? 96 : 64, base, offset, SORR_SAVE); -} - -/* Emit code to restore call-saved registers. */ - -static void -emit_restore_regs (void) -{ - HOST_WIDE_INT offset; - rtx base; - - offset = frame_base_offset - apparent_fsize; - - if (offset < -4096 || offset + num_gfregs * 4 > 4096 - 8 /*double*/) - { - base = gen_rtx_REG (Pmode, 1); - emit_move_insn (base, GEN_INT (offset)); - emit_insn (gen_rtx_SET (VOIDmode, - base, - gen_rtx_PLUS (Pmode, frame_base_reg, base))); - offset = 0; - } - else - base = frame_base_reg; - - offset = save_or_restore_regs (0, 8, base, offset, SORR_RESTORE); - save_or_restore_regs (32, TARGET_V9 ? 96 : 64, base, offset, SORR_RESTORE); + offset = save_or_restore_regs (0, 8, base, offset, action); + save_or_restore_regs (32, TARGET_V9 ? 96 : 64, base, offset, action); } /* Generate a save_register_window insn. */ @@ -3814,9 +3786,8 @@ sparc_expand_prologue (void) RTX_FRAME_RELATED_P (XVECEXP (PATTERN (insn), 0, i)) = 1; } - /* Call-saved registers are saved just above the outgoing argument area. */ if (num_gfregs) - emit_save_regs (); + emit_save_or_restore_regs (SORR_SAVE); /* Load the PIC register if needed. */ if (flag_pic && current_function_uses_pic_offset_table) @@ -3824,12 +3795,7 @@ sparc_expand_prologue (void) } /* This function generates the assembly code for function entry, which boils - down to emitting the necessary .register directives. - - ??? Historical cruft: "On SPARC, move-double insns between fpu and cpu need - an 8-byte block of memory. If any fpu reg is used in the function, we - allocate such a block here, at the bottom of the frame, just in case it's - needed." Could this explain the -8 in emit_restore_regs? */ + down to emitting the necessary .register directives. */ static void sparc_asm_function_prologue (FILE *file, HOST_WIDE_INT size ATTRIBUTE_UNUSED) @@ -3847,7 +3813,7 @@ void sparc_expand_epilogue (void) { if (num_gfregs) - emit_restore_regs (); + emit_save_or_restore_regs (SORR_RESTORE); if (actual_fsize == 0) /* do nothing. */ ; |