re PR middle-end/50632 (FAIL: gcc.dg/pr50132.c)
PR 50632 * combine-stack-adjust.c (maybe_move_args_size_note): Add after parameter; use it to decide whether to merge two notes. (combine_stack_adjustments_for_block): Use maybe_move_args_size_note for the deallocation case as well. From-SVN: r179637
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@ -1,3 +1,10 @@
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2011-10-06 Richard Henderson <rth@redhat.com>
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* combine-stack-adjust.c (maybe_move_args_size_note): Add after
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parameter; use it to decide whether to merge two notes.
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(combine_stack_adjustments_for_block): Use maybe_move_args_size_note
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for the deallocation case as well.
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2011-10-06 Anatoly Sokolov <aesok@post.ru>
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* system.h (OUTPUT_ADDR_CONST_EXTRA): Poison.
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@ -296,10 +296,11 @@ record_stack_refs (rtx *xp, void *data)
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return 0;
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}
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/* If INSN has a REG_ARGS_SIZE note, move it to LAST. */
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/* If INSN has a REG_ARGS_SIZE note, move it to LAST.
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AFTER is true iff LAST follows INSN in the instruction stream. */
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static void
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maybe_move_args_size_note (rtx last, rtx insn)
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maybe_move_args_size_note (rtx last, rtx insn, bool after)
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{
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rtx note, last_note;
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@ -309,7 +310,12 @@ maybe_move_args_size_note (rtx last, rtx insn)
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last_note = find_reg_note (last, REG_ARGS_SIZE, NULL_RTX);
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if (last_note)
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XEXP (last_note, 0) = XEXP (note, 0);
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{
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/* The ARGS_SIZE notes are *not* cumulative. They represent an
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absolute value, and the "most recent" note wins. */
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if (!after)
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XEXP (last_note, 0) = XEXP (note, 0);
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}
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else
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add_reg_note (last, REG_ARGS_SIZE, XEXP (note, 0));
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}
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@ -385,7 +391,7 @@ combine_stack_adjustments_for_block (basic_block bb)
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last_sp_adjust + this_adjust,
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this_adjust))
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{
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maybe_move_args_size_note (last_sp_set, insn);
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maybe_move_args_size_note (last_sp_set, insn, false);
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/* It worked! */
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delete_insn (insn);
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@ -403,6 +409,8 @@ combine_stack_adjustments_for_block (basic_block bb)
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last_sp_adjust + this_adjust,
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-last_sp_adjust))
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{
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maybe_move_args_size_note (insn, last_sp_set, true);
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/* It worked! */
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delete_insn (last_sp_set);
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last_sp_set = insn;
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