diff options
Diffstat (limited to 'gcc/config/bfin/bfin.c')
| -rw-r--r-- | gcc/config/bfin/bfin.c | 97 |
1 files changed, 83 insertions, 14 deletions
diff --git a/gcc/config/bfin/bfin.c b/gcc/config/bfin/bfin.c index 727f2ca9b81..94849ce225b 100644 --- a/gcc/config/bfin/bfin.c +++ b/gcc/config/bfin/bfin.c @@ -569,12 +569,14 @@ frame_related_constant_load (rtx reg, HOST_WIDE_INT constant, bool related) RTX_FRAME_RELATED_P (insn) = 1; } -/* Generate efficient code to add a value to a P register. We can use - P1 as a scratch register. Set RTX_FRAME_RELATED_P on the generated - insns if FRAME is nonzero. */ +/* Generate efficient code to add a value to a P register. + Set RTX_FRAME_RELATED_P on the generated insns if FRAME is nonzero. + EPILOGUE_P is zero if this function is called for prologue, + otherwise it's nonzero. And it's less than zero if this is for + sibcall epilogue. */ static void -add_to_reg (rtx reg, HOST_WIDE_INT value, int frame) +add_to_reg (rtx reg, HOST_WIDE_INT value, int frame, int epilogue_p) { if (value == 0) return; @@ -584,9 +586,41 @@ add_to_reg (rtx reg, HOST_WIDE_INT value, int frame) in one instruction. */ if (value > 120 || value < -120) { - rtx tmpreg = gen_rtx_REG (SImode, REG_P1); + rtx tmpreg; + rtx tmpreg2; rtx insn; + tmpreg2 = NULL_RTX; + + /* For prologue or normal epilogue, P1 can be safely used + as the temporary register. For sibcall epilogue, we try to find + a call used P register, which will be restored in epilogue. + If we cannot find such a P register, we have to use one I register + to help us. */ + + if (epilogue_p >= 0) + tmpreg = gen_rtx_REG (SImode, REG_P1); + else + { + int i; + for (i = REG_P0; i <= REG_P5; i++) + if ((regs_ever_live[i] && ! call_used_regs[i]) + || (!TARGET_FDPIC + && i == PIC_OFFSET_TABLE_REGNUM + && (current_function_uses_pic_offset_table + || (TARGET_ID_SHARED_LIBRARY + && ! current_function_is_leaf)))) + break; + if (i <= REG_P5) + tmpreg = gen_rtx_REG (SImode, i); + else + { + tmpreg = gen_rtx_REG (SImode, REG_P1); + tmpreg2 = gen_rtx_REG (SImode, REG_I0); + emit_move_insn (tmpreg2, tmpreg); + } + } + if (frame) frame_related_constant_load (tmpreg, value, TRUE); else @@ -595,6 +629,9 @@ add_to_reg (rtx reg, HOST_WIDE_INT value, int frame) insn = emit_insn (gen_addsi3 (reg, reg, tmpreg)); if (frame) RTX_FRAME_RELATED_P (insn) = 1; + + if (tmpreg2 != NULL_RTX) + emit_move_insn (tmpreg, tmpreg2); } else do @@ -702,14 +739,17 @@ do_link (rtx spreg, HOST_WIDE_INT frame_size, bool all) rtx insn = emit_insn (pat); RTX_FRAME_RELATED_P (insn) = 1; } - add_to_reg (spreg, -frame_size, 1); + add_to_reg (spreg, -frame_size, 1, 0); } } -/* Like do_link, but used for epilogues to deallocate the stack frame. */ +/* Like do_link, but used for epilogues to deallocate the stack frame. + EPILOGUE_P is zero if this function is called for prologue, + otherwise it's nonzero. And it's less than zero if this is for + sibcall epilogue. */ static void -do_unlink (rtx spreg, HOST_WIDE_INT frame_size, bool all) +do_unlink (rtx spreg, HOST_WIDE_INT frame_size, bool all, int epilogue_p) { frame_size += arg_area_size (); @@ -719,7 +759,7 @@ do_unlink (rtx spreg, HOST_WIDE_INT frame_size, bool all) { rtx postinc = gen_rtx_MEM (Pmode, gen_rtx_POST_INC (Pmode, spreg)); - add_to_reg (spreg, frame_size, 0); + add_to_reg (spreg, frame_size, 0, epilogue_p); if (must_save_fp_p ()) { rtx fpreg = gen_rtx_REG (Pmode, REG_FP); @@ -842,7 +882,7 @@ expand_interrupt_handler_epilogue (rtx spreg, e_funkind fkind) insns. */ MEM_VOLATILE_P (postinc) = 1; - do_unlink (spreg, get_frame_size (), all); + do_unlink (spreg, get_frame_size (), all, 1); if (lookup_attribute ("nesting", attrs)) { @@ -968,7 +1008,7 @@ bfin_expand_prologue (void) { if (lim != p2reg) emit_move_insn (p2reg, lim); - add_to_reg (p2reg, offset, 0); + add_to_reg (p2reg, offset, 0, 0); lim = p2reg; } emit_insn (gen_compare_lt (bfin_cc_rtx, spreg, lim)); @@ -987,13 +1027,15 @@ bfin_expand_prologue (void) /* Generate RTL for the epilogue of the current function. NEED_RETURN is zero if this is for a sibcall. EH_RETURN is nonzero if we're expanding an - eh_return pattern. */ + eh_return pattern. SIBCALL_P is true if this is a sibcall epilogue, + false otherwise. */ void -bfin_expand_epilogue (int need_return, int eh_return) +bfin_expand_epilogue (int need_return, int eh_return, bool sibcall_p) { rtx spreg = gen_rtx_REG (Pmode, REG_SP); e_funkind fkind = funkind (TREE_TYPE (current_function_decl)); + int e = sibcall_p ? -1 : 1; if (fkind != SUBROUTINE) { @@ -1001,7 +1043,7 @@ bfin_expand_epilogue (int need_return, int eh_return) return; } - do_unlink (spreg, get_frame_size (), false); + do_unlink (spreg, get_frame_size (), false, e); expand_epilogue_reg_restore (spreg, false, false); @@ -2077,8 +2119,17 @@ bfin_handle_option (size_t code, const char *arg, int value) bfin_cpu_type = BFIN_CPU_BF532; else if (strcmp (arg, "bf533") == 0) bfin_cpu_type = BFIN_CPU_BF533; + else if (strcmp (arg, "bf534") == 0) + bfin_cpu_type = BFIN_CPU_BF534; + else if (strcmp (arg, "bf536") == 0) + bfin_cpu_type = BFIN_CPU_BF536; else if (strcmp (arg, "bf537") == 0) bfin_cpu_type = BFIN_CPU_BF537; + else if (strcmp (arg, "bf561") == 0) + { + warning (0, "bf561 support is incomplete yet."); + bfin_cpu_type = BFIN_CPU_BF561; + } else return false; return true; @@ -2994,6 +3045,24 @@ bfin_expand_movmem (rtx dst, rtx src, rtx count_exp, rtx align_exp) return false; } +/* Compute the alignment for a local variable. + TYPE is the data type, and ALIGN is the alignment that + the object would ordinarily have. The value of this macro is used + instead of that alignment to align the object. */ + +int +bfin_local_alignment (tree type, int align) +{ + /* Increasing alignment for (relatively) big types allows the builtin + memcpy can use 32 bit loads/stores. */ + if (TYPE_SIZE (type) + && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST + && (TREE_INT_CST_LOW (TYPE_SIZE (type)) > 8 + || TREE_INT_CST_HIGH (TYPE_SIZE (type))) && align < 32) + return 32; + return align; +} + /* Implement TARGET_SCHED_ISSUE_RATE. */ static int |