diff options
Diffstat (limited to 'gcc/loop.h')
| -rw-r--r-- | gcc/loop.h | 33 |
1 files changed, 33 insertions, 0 deletions
@@ -164,6 +164,15 @@ struct iv_class { biv controls. */ }; + +typedef struct loop_mem_info +{ + rtx mem; /* The MEM itself. */ + rtx reg; /* Corresponding pseudo, if any. */ + int optimize; /* Nonzero if we can optimize access to this MEM. */ +} loop_mem_info; + + /* Information required to calculate the number of loop iterations. This is set by loop_iterations. */ @@ -207,6 +216,30 @@ struct loop_info /* The number of times the loop body was unrolled. */ unsigned int unroll_number; int used_count_register; + /* List of MEMs that are stored in this loop. */ + rtx store_mems; + /* Array of MEMs that are used (read or written) in this loop, but + cannot be aliased by anything in this loop, except perhaps + themselves. In other words, if mems[i] is altered during + the loop, it is altered by an expression that is rtx_equal_p to + it. */ + loop_mem_info *mems; + /* The index of the next available slot in MEMS. */ + int mems_idx; + /* The number of elements allocated in MEMS. */ + int mems_allocated; + /* Nonzero if we don't know what MEMs were changed in the current + loop. This happens if the loop contains a call (in which case + `has_call' will also be set) or if we store into more than + NUM_STORES MEMs. */ + int unknown_address_altered; + /* The above doesn't count any readonly memory locations that are + stored. This does. */ + int unknown_constant_address_altered; + /* Count of memory write instructions discovered in the loop. */ + int num_mem_sets; + /* The insn where the first of these was found. */ + rtx first_loop_store_insn; }; /* Definitions used by the basic induction variable discovery code. */ |