124 lines
3.6 KiB
Diff
124 lines
3.6 KiB
Diff
2010-01-25 Alexandre Oliva <aoliva@redhat.com>
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PR debug/42861
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* var-tracking.c (val_store): Add modified argument, obey it.
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Adjust callers.
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(count_uses): Move down logging of main.
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(compute_bb_dataflow): Use val_store for MO_VAL_USEs that
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don't need resolution.
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(emit_notes_in_bb): Likewise.
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--- gcc/var-tracking.c.jj 2010-01-21 09:10:37.000000000 +0100
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+++ gcc/var-tracking.c 2010-01-25 23:18:07.239731089 +0100
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@@ -1518,10 +1518,12 @@ var_mem_delete (dataflow_set *set, rtx l
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delete_variable_part (set, loc, dv_from_decl (decl), offset);
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}
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-/* Map a value to a location it was just stored in. */
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+/* Bind a value to a location it was just stored in. If MODIFIED
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+ holds, assume the location was modified, detaching it from any
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+ values bound to it. */
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static void
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-val_store (dataflow_set *set, rtx val, rtx loc, rtx insn)
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+val_store (dataflow_set *set, rtx val, rtx loc, rtx insn, bool modified)
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{
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cselib_val *v = CSELIB_VAL_PTR (val);
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@@ -1547,7 +1549,8 @@ val_store (dataflow_set *set, rtx val, r
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if (REG_P (loc))
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{
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- var_regno_delete (set, REGNO (loc));
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+ if (modified)
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+ var_regno_delete (set, REGNO (loc));
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var_reg_decl_set (set, loc, VAR_INIT_STATUS_INITIALIZED,
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dv_from_value (val), 0, NULL_RTX, INSERT);
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}
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@@ -4529,11 +4532,6 @@ count_uses (rtx *ploc, void *cuip)
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cselib_val *val;
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enum machine_mode mode = GET_MODE (loc);
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- VTI (cui->bb)->n_mos++;
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-
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- if (dump_file && (dump_flags & TDF_DETAILS))
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- log_op_type (loc, cui->bb, cui->insn, mopt, dump_file);
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-
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switch (mopt)
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{
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case MO_VAL_LOC:
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@@ -4547,12 +4545,15 @@ count_uses (rtx *ploc, void *cuip)
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if (MEM_P (loc)
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&& !REG_P (XEXP (loc, 0)) && !MEM_P (XEXP (loc, 0)))
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{
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- val = cselib_lookup (XEXP (loc, 0), Pmode, false);
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+ val = cselib_lookup (XEXP (loc, 0), Pmode, 0);
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if (val && !cselib_preserved_value_p (val))
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{
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VTI (cui->bb)->n_mos++;
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cselib_preserve_value (val);
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+ if (dump_file && (dump_flags & TDF_DETAILS))
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+ log_op_type (XEXP (loc, 0), cui->bb, cui->insn,
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+ MO_VAL_USE, dump_file);
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}
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}
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@@ -4575,6 +4576,9 @@ count_uses (rtx *ploc, void *cuip)
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{
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VTI (cui->bb)->n_mos++;
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cselib_preserve_value (oval);
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+ if (dump_file && (dump_flags & TDF_DETAILS))
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+ log_op_type (loc, cui->bb, cui->insn,
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+ MO_VAL_USE, dump_file);
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}
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}
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@@ -4589,6 +4593,10 @@ count_uses (rtx *ploc, void *cuip)
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default:
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break;
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}
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+
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+ VTI (cui->bb)->n_mos++;
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+ if (dump_file && (dump_flags & TDF_DETAILS))
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+ log_op_type (loc, cui->bb, cui->insn, mopt, dump_file);
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}
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return 0;
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@@ -5318,6 +5326,8 @@ compute_bb_dataflow (basic_block bb)
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if (VAL_NEEDS_RESOLUTION (loc))
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val_resolve (out, val, vloc, insn);
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+ else
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+ val_store (out, val, uloc, insn, false);
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if (VAL_HOLDS_TRACK_EXPR (loc))
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{
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@@ -5409,7 +5419,7 @@ compute_bb_dataflow (basic_block bb)
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else if (REG_P (uloc))
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var_regno_delete (out, REGNO (uloc));
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- val_store (out, val, vloc, insn);
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+ val_store (out, val, vloc, insn, true);
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}
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break;
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@@ -6939,6 +6949,8 @@ emit_notes_in_bb (basic_block bb, datafl
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if (VAL_NEEDS_RESOLUTION (loc))
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val_resolve (set, val, vloc, insn);
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+ else
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+ val_store (set, val, uloc, insn, false);
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if (VAL_HOLDS_TRACK_EXPR (loc))
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{
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@@ -7026,7 +7038,7 @@ emit_notes_in_bb (basic_block bb, datafl
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else if (REG_P (uloc))
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var_regno_delete (set, REGNO (uloc));
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- val_store (set, val, vloc, insn);
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+ val_store (set, val, vloc, insn, true);
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emit_notes_for_changes (NEXT_INSN (insn), EMIT_NOTE_BEFORE_INSN,
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set->vars);
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