diff options
Diffstat (limited to 'gcc/loop-invariant.c')
| -rw-r--r-- | gcc/loop-invariant.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/gcc/loop-invariant.c b/gcc/loop-invariant.c index 5eee2e5..be95155 100644 --- a/gcc/loop-invariant.c +++ b/gcc/loop-invariant.c @@ -1691,6 +1691,7 @@ can_move_invariant_reg (class loop *loop, struct invariant *inv, rtx reg) unsigned int dest_regno, defs_in_loop_count = 0; rtx_insn *insn = inv->insn; basic_block bb = BLOCK_FOR_INSN (inv->insn); + auto_vec <rtx_insn *, 16> debug_insns_to_reset; /* We ignore hard register and memory access for cost and complexity reasons. Hard register are few at this stage and expensive to consider as they @@ -1725,10 +1726,13 @@ can_move_invariant_reg (class loop *loop, struct invariant *inv, rtx reg) continue; /* Don't move if a use is not dominated by def in insn. */ - if (use_bb == bb && DF_INSN_LUID (insn) >= DF_INSN_LUID (use_insn)) - return false; - if (!dominated_by_p (CDI_DOMINATORS, use_bb, bb)) - return false; + if ((use_bb == bb && DF_INSN_LUID (insn) >= DF_INSN_LUID (use_insn)) + || !dominated_by_p (CDI_DOMINATORS, use_bb, bb)) + { + if (!DEBUG_INSN_P (use_insn)) + return false; + debug_insns_to_reset.safe_push (use_insn); + } } /* Check for other defs. Any other def in the loop might reach a use @@ -1751,6 +1755,13 @@ can_move_invariant_reg (class loop *loop, struct invariant *inv, rtx reg) return false; } + /* Reset debug uses if a use is not dominated by def in insn. */ + for (auto use_insn : debug_insns_to_reset) + { + INSN_VAR_LOCATION_LOC (use_insn) = gen_rtx_UNKNOWN_VAR_LOC (); + df_insn_rescan (use_insn); + } + return true; } |