diff options
Diffstat (limited to 'gcc/loop.h')
| -rw-r--r-- | gcc/loop.h | 27 |
1 files changed, 23 insertions, 4 deletions
@@ -18,6 +18,8 @@ along with GNU CC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include "varray.h" + /* Get the luid of an insn. Catch the error of trying to reference the LUID of an insn added during loop, since these don't have LUIDs. */ @@ -54,6 +56,8 @@ struct induction For a DEST_ADDR type giv, this is 0. */ rtx *location; /* Place in the insn where this giv occurs. If GIV_TYPE is DEST_REG, this is 0. */ + /* For a biv, this is the place where add_val + was found. */ enum machine_mode mode; /* The mode of this biv or giv */ enum machine_mode mem_mode; /* For DEST_ADDR, mode of the memory object. */ rtx mult_val; /* Multiplicative factor for src_reg. */ @@ -63,6 +67,9 @@ struct induction final value could be calculated, it is put here, and the giv is made replaceable. Set the giv to this value before the loop. */ + unsigned combined_with; /* The number of givs this giv has been + combined with. If nonzero, this giv + cannot combine with any other giv. */ unsigned replaceable : 1; /* 1 if we can substitute the strength-reduced variable for the original variable. 0 means they must be kept separate and the @@ -85,8 +92,6 @@ struct induction another giv. This occurs in many cases where a giv's lifetime spans an update to a biv. */ - unsigned combined_with : 1; /* 1 if this giv has been combined with. It - then cannot combine with any other giv. */ unsigned maybe_dead : 1; /* 1 if this giv might be dead. In that case, we won't use it to eliminate a biv, it would probably lose. */ @@ -96,6 +101,8 @@ struct induction initialized in unrolled loop. */ unsigned shared : 1; unsigned no_const_addval : 1; /* 1 if add_val does not contain a const. */ + unsigned derived : 1; /* For a giv, 1 if we decided to derive this + giv from another one. */ int lifetime; /* Length of life of this giv */ rtx derive_adjustment; /* If nonzero, is an adjustment to be subtracted from add_val when this giv @@ -112,10 +119,14 @@ struct induction is split, and a constant is eliminated from the address, the -constant is stored here for later use. */ + int ix; /* Used by recombine_givs, as n index into + the stats array. */ struct induction *same_insn; /* If there are multiple identical givs in the same insn, then all but one have this field set, and they all point to the giv that doesn't have this field set. */ + rtx last_use; /* For a giv made from a biv increment, this is + a substitute for the lifetime information. */ }; /* A `struct iv_class' is created for each biv. */ @@ -197,11 +208,19 @@ extern int max_reg_before_loop; extern FILE *loop_dump_stream; -extern enum iv_mode *reg_iv_type; -extern struct induction **reg_iv_info; +extern varray_type reg_iv_type; +extern varray_type reg_iv_info; + +#define REG_IV_TYPE(n) \ + (*(enum iv_mode *) &VARRAY_INT(reg_iv_type, (n))) +#define REG_IV_INFO(n) \ + (*(struct induction **) &VARRAY_GENERIC_PTR(reg_iv_info, (n))) + extern struct iv_class **reg_biv_class; extern struct iv_class *loop_iv_list; +extern int first_increment_giv, last_increment_giv; + /* Forward declarations for non-static functions declared in loop.c and unroll.c. */ int invariant_p PROTO((rtx)); |