diff options
Diffstat (limited to 'gcc-4.6/gcc/config/avr/avr.c')
| -rw-r--r-- | gcc-4.6/gcc/config/avr/avr.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/gcc-4.6/gcc/config/avr/avr.c b/gcc-4.6/gcc/config/avr/avr.c index 98456b3..b5a61a3 100644 --- a/gcc-4.6/gcc/config/avr/avr.c +++ b/gcc-4.6/gcc/config/avr/avr.c @@ -535,6 +535,17 @@ sequent_regs_live (void) for (reg = 0; reg < 18; ++reg) { + if (fixed_regs[reg]) + { + /* Don't recognize sequences that contain global register + variables. */ + + if (live_seq != 0) + return 0; + else + continue; + } + if (!call_used_regs[reg]) { if (df_regs_ever_live_p (reg)) @@ -1868,9 +1879,12 @@ output_movhi (rtx insn, rtx operands[], int *l) } else if (test_hard_reg_class (STACK_REG, src)) { - *l = 2; - return (AS2 (in,%A0,__SP_L__) CR_TAB - AS2 (in,%B0,__SP_H__)); + *l = 2; + return AVR_HAVE_8BIT_SP + ? (AS2 (in,%A0,__SP_L__) CR_TAB + AS1 (clr,%B0)) + : (AS2 (in,%A0,__SP_L__) CR_TAB + AS2 (in,%B0,__SP_H__)); } if (AVR_HAVE_MOVW) @@ -3107,8 +3121,11 @@ out_shift_with_cnt (const char *templ, rtx insn, rtx operands[], } else if (register_operand (operands[2], QImode)) { - if (reg_unused_after (insn, operands[2])) - op[3] = op[2]; + if (reg_unused_after (insn, operands[2]) + && !reg_overlap_mentioned_p (operands[0], operands[2])) + { + op[3] = op[2]; + } else { op[3] = tmp_reg_rtx; @@ -5159,10 +5176,10 @@ avr_file_start (void) default_file_start (); -/* fprintf (asm_out_file, "\t.arch %s\n", avr_mcu_name);*/ - fputs ("__SREG__ = 0x3f\n" - "__SP_H__ = 0x3e\n" - "__SP_L__ = 0x3d\n", asm_out_file); + fputs ("__SREG__ = 0x3f\n", asm_out_file); + if (!AVR_HAVE_8BIT_SP) + fputs ("__SP_H__ = 0x3e\n", asm_out_file); + fputs ("__SP_L__ = 0x3d\n", asm_out_file); fputs ("__tmp_reg__ = 0\n" "__zero_reg__ = 1\n", asm_out_file); |