From 7b5cbb57032c98320bc7b5ba9da3dab8362a393d Mon Sep 17 00:00:00 2001 From: Anatoly Sokolov Date: Wed, 26 Aug 2009 01:09:00 +0400 Subject: hooks.h (hook_bool_const_int_const_int_true): Declare. * hooks.h (hook_bool_const_int_const_int_true): Declare. * hooks.c (hook_bool_const_int_const_int_true): New function. * target.h (struct gcc_target): Add can_eliminate field. * target-def.h (TARGET_CAN_ELIMINATE): Define. (TARGET_INITIALIZER): Use TARGET_CAN_ELIMINATE. * ira.c (setup_eliminable_regset): Use can_eliminate target hook. * reload1.c (update_eliminables, init_elim_table): (Ditto.). (elim_table): Revise comment. * system.h (CAN_ELIMINATE): Poison. * defaults.h (CAN_ELIMINATE): Remove. * doc/tm.texi (CAN_ELIMINATE): Revise documentation. * config/alpha/vms.h (CAN_ELIMINATE): Remove macro. * config/alpha/alpha.c (TARGET_CAN_ELIMINATE) [TARGET_ABI_OPEN_VMS]: Define macro. (alpha_vms_can_eliminate): Declare as static, change return type to bool. * config/alpha/alpha-protos.h (alpha_vms_can_eliminate): Remove. * config/arm/arm.h (CAN_ELIMINATE): Remove macro. * config/arm/arm.c (TARGET_CAN_ELIMINATE): Define macro. (arm_can_eliminate): New function. * config/avr/avr.h (CAN_ELIMINATE): Remove macro. * config/avr/avr.c (TARGET_CAN_ELIMINATE): Define macro. (avr_can_eliminate): Declare as static. * config/avr/avr-protos.h (avr_can_eliminate): Remove. * config/bfin/bfin.h (CAN_ELIMINATE): Remove macro. * config/bfin/bfin.c (TARGET_CAN_ELIMINATE): Define macro. (bfin_can_eliminate): New function. * config/crx/crx.h (CAN_ELIMINATE): Remove macro. * config/crx/crx.c (TARGET_CAN_ELIMINATE): Define macro. (crx_can_eliminate): New function. * config/fr30/fr30.h (CAN_ELIMINATE): Remove macro. * config/fr30/fr30.c (TARGET_CAN_ELIMINATE): Define macro. (fr30_can_eliminate): New function. * config/frv/frv.h (CAN_ELIMINATE): Remove macro. * config/frv/frv.c (TARGET_CAN_ELIMINATE): Define macro. (frv_can_eliminate): New function. * config/h8300/h8300.h (CAN_ELIMINATE): Remove macro. * config/h8300/h8300.c (TARGET_CAN_ELIMINATE): Define macro. (h8300_can_eliminate): New function. * config/i386/i386.h (CAN_ELIMINATE): Remove macro. * config/i386/i386.c (TARGET_CAN_ELIMINATE): Define macro. (i386_can_eliminate): Declare as static, change return type to bool. * config/i386/i386-protos.h (i386_can_eliminate): Remove. * config/ia64/ia64.h (CAN_ELIMINATE): Remove macro. * config/ia64/ia64.c (TARGET_CAN_ELIMINATE): Define macro. (ia64_can_eliminate): New function. * config/iq2000/iq2000.h (CAN_ELIMINATE): Remove macro. * config/iq2000/iq2000.c (TARGET_CAN_ELIMINATE): Define macro. (iq2000_can_eliminate): New function. * config/m32r/m32r.h (CAN_ELIMINATE): Remove macro. * config/m32r/m32r.c (TARGET_CAN_ELIMINATE): Define macro. (m32r_can_eliminate): New function. * config/m68hc11/m68hc11.h (CAN_ELIMINATE): Remove macro. * config/m68hc11/m68hc11.c (TARGET_CAN_ELIMINATE): Define macro. (m68hc11_can_eliminate): New function. * config/m68k/m68k.h (CAN_ELIMINATE): Remove macro. * config/m68k/m68k.c (TARGET_CAN_ELIMINATE): Define macro. (m68k_can_eliminate): New function. * config/mep/mep.h (CAN_ELIMINATE): Remove macro. * config/mep/mep.c (TARGET_CAN_ELIMINATE): Define macro. (mep_can_eliminate): New function. * config/mips/mips.h (CAN_ELIMINATE): Remove macro. * config/mips/mips.c (TARGET_CAN_ELIMINATE): Define macro. (mips_can_eliminate): New function. * config/rs6000/rs6000.h (CAN_ELIMINATE): Remove macro. * config/rs6000/rs6000.c (TARGET_CAN_ELIMINATE): Define macro. (rs6000_can_eliminate): New function. * config/s390/s390.h (CAN_ELIMINATE): Remove macro. * config/s390/s390.c (TARGET_CAN_ELIMINATE): Define macro. (s390_can_eliminate): Declare as static. * config/s390/s390-protos.h (sparc_can_eliminate): Remove. * config/score/score.h (CAN_ELIMINATE): Remove macro. * config/score/score.c (TARGET_CAN_ELIMINATE): Define macro. (score_can_eliminate): New function. * config/sparc/sparc.h (CAN_ELIMINATE): Remove macro. * config/sparc/sparc.c (TARGET_CAN_ELIMINATE): Define macro. (sparc_can_eliminate): Declare as static. * config/sparc/sparc-protos.h (sparc_can_eliminate): Remove. * config/stormy16/stormy16.h (CAN_ELIMINATE): Remove macro. * config/stormy16/stormy16.c (TARGET_CAN_ELIMINATE): Define macro. (xstormy16_can_eliminate): New function. * config/v850/v850.h (CAN_ELIMINATE): Remove macro. * config/v850/v850.c (TARGET_CAN_ELIMINATE): Define macro. (v850_can_eliminate): New function. From-SVN: r151096 --- gcc/config/rs6000/rs6000.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'gcc/config/rs6000/rs6000.c') diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 95f8ab5..cb64d28 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -1088,6 +1088,7 @@ static const enum reg_class *rs6000_ira_cover_classes (void); const int INSN_NOT_AVAILABLE = -1; static enum machine_mode rs6000_eh_return_filter_mode (void); +static bool rs6000_can_eliminate (const int, const int); /* Hash table stuff for keeping track of TOC entries. */ @@ -1453,6 +1454,9 @@ static const struct attribute_spec rs6000_attribute_table[] = #undef TARGET_LEGITIMATE_ADDRESS_P #define TARGET_LEGITIMATE_ADDRESS_P rs6000_legitimate_address_p +#undef TARGET_CAN_ELIMINATE +#define TARGET_CAN_ELIMINATE rs6000_can_eliminate + struct gcc_target targetm = TARGET_INITIALIZER; /* Return number of consecutive hard regs needed starting at reg REGNO @@ -25011,6 +25015,26 @@ rs6000_libcall_value (enum machine_mode mode) return gen_rtx_REG (mode, regno); } + +/* Given FROM and TO register numbers, say whether this elimination is allowed. + Frame pointer elimination is automatically handled. + + For the RS/6000, if frame pointer elimination is being done, we would like + to convert ap into fp, not sp. + + We need r30 if -mminimal-toc was specified, and there are constant pool + references. */ + +bool +rs6000_can_eliminate (const int from, const int to) +{ + return (from == ARG_POINTER_REGNUM && to == STACK_POINTER_REGNUM + ? ! frame_pointer_needed + : from == RS6000_PIC_OFFSET_TABLE_REGNUM + ? ! TARGET_MINIMAL_TOC || TARGET_NO_TOC || get_pool_size () == 0 + : true); +} + /* Define the offset between two registers, FROM to be eliminated and its replacement TO, at the start of a routine. */ HOST_WIDE_INT -- cgit v1.1