insn_chain Struct Reference

#include <reload.h>

Collaboration diagram for insn_chain:

Data Fields
struct insn_chain *	next
struct insn_chain *	prev
struct insn_chain *	next_need_reload
rtx	insn
int	block
unsigned int	need_reload:1
unsigned int	need_operand_change:1
unsigned int	need_elim:1
unsigned int	is_caller_save_insn:1
bitmap_head	live_throughout
bitmap_head	dead_or_set
struct reload *	rld
int	n_reloads
HARD_REG_SET	used_spill_regs

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Detailed Description

   This structure describes instructions which are relevant for reload.
   Apart from all regular insns, this also includes CODE_LABELs, since they
   must be examined for register elimination.  

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Field Documentation

int insn_chain::block

     The basic block this insn is in.  

bitmap_head insn_chain::dead_or_set

Referenced by insert_restore(), print_insn_chains(), replace_reg_with_saved_mem(), and setup_reg_equiv().

rtx insn_chain::insn

     The rtx of the insn.  

Referenced by do_output_reload(), maybe_fix_stack_asms(), and saved_hard_reg_compare_func().

unsigned int insn_chain::is_caller_save_insn

     Nonzero if this insn was inserted by perform_caller_saves.  

bitmap_head insn_chain::live_throughout

     Register life information: record all live hard registers, and
     all live pseudos that have a hard register.  This set also
     contains pseudos spilled by IRA.  

Referenced by save_call_clobbered_regs(), and saved_hard_reg_compare_func().

int insn_chain::n_reloads

Referenced by maybe_fix_stack_asms().

unsigned int insn_chain::need_elim

     Nonzero if eliminate_regs_in_insn said it requires eliminations.  

Referenced by maybe_fix_stack_asms(), and spill_hard_reg().

unsigned int insn_chain::need_operand_change

     Nonzero if find_reloads needs to be run during reload_as_needed to
     perform modifications on any operands.  

Referenced by maybe_fix_stack_asms().

unsigned int insn_chain::need_reload

     Nonzero if find_reloads said the insn requires reloading.  

Referenced by maybe_fix_stack_asms().

struct insn_chain* insn_chain::next

     Links to the neighbor instructions.  

Referenced by maybe_fix_stack_asms(), and saved_hard_reg_compare_func().

struct insn_chain* insn_chain::next_need_reload

     Link through a chains set up by calculate_needs_all_insns, containing
     all insns that need reloading.  

Referenced by maybe_fix_stack_asms().

struct insn_chain * insn_chain::prev

Referenced by maybe_fix_stack_asms().

struct reload* insn_chain::rld

     Copies of the global variables computed by find_reloads.  

HARD_REG_SET insn_chain::used_spill_regs

     Indicates which registers have already been used for spills.  

Referenced by elimination_target_reg_p().

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The documentation for this struct was generated from the following file:

• reload.h