split_info Class Reference

Collaboration diagram for split_info:

Public Member Functions
	split_info ()
	~split_info ()

Data Fields
basic_block *	bbs
auto_vec< gimple * >	memory_stores
int	need_init
auto_vec< hash_set< basic_block > * >	control_deps

Detailed Description

Another transformation of loops like:

for (i = INIT (); CHECK (i); i = NEXT ())
  {
    if (expr (a_1, a_2, ..., a_n))  // expr is pure
      a_j = ...;  // change at least one a_j
    else
      S;          // not change any a_j
  }

into:

for (i = INIT (); CHECK (i); i = NEXT ())
  {
    if (expr (a_1, a_2, ..., a_n))
      a_j = ...;
    else
      {
        S;
        i = NEXT ();
        break;
      }
  }

for (; CHECK (i); i = NEXT ())
  {
    S;
  }

Data structure to hold temporary information during loop split upon
semi-invariant conditional statement.   

Constructor & Destructor Documentation

split_info()

split_info::split_info ( )

inline

References bbs, need_init, NULL, and true.

~split_info()

split_info::~split_info ( )

inline

References bbs, control_deps, free(), and i.

Field Documentation

bbs

basic_block* split_info::bbs

Referenced by split_info(), split_loop_on_cond(), and ~split_info().

control_deps

auto_vec<hash_set<basic_block> *> split_info::control_deps

Referenced by ~split_info().

memory_stores

auto_vec<gimple *> split_info::memory_stores

Referenced by find_vdef_in_loop(), and vuse_semi_invariant_p().

need_init

int split_info::need_init

Referenced by find_vdef_in_loop(), split_info(), and vuse_semi_invariant_p().

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

• tree-ssa-loop-split.cc