re PR rtl-optimization/37451 (Extra addition for doloop in some cases)
2008-09-18 Andrew Pinski <andrew_pinski@playstation.sony.com> PR rtl-opt/37451 * loop-doloop.c (doloop_modify): New argument zero_extend_p and zero extend count after the correction to it is done. (doloop_optimize): Update call to doloop_modify, don't zero extend count before call. From-SVN: r140470
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@ -1,3 +1,11 @@
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2008-09-18 Andrew Pinski <andrew_pinski@playstation.sony.com>
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PR rtl-opt/37451
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* loop-doloop.c (doloop_modify): New argument zero_extend_p and
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zero extend count after the correction to it is done.
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(doloop_optimize): Update call to doloop_modify, don't zero extend
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count before call.
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2008-09-18 Martin Jambor <mjambor@suse.cz>
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2008-09-18 Martin Jambor <mjambor@suse.cz>
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* ipa-cp.c (ipcp_estimate_growth): Return 0 instead of false.
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* ipa-cp.c (ipcp_estimate_growth): Return 0 instead of false.
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@ -333,11 +333,13 @@ add_test (rtx cond, edge *e, basic_block dest)
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describes the loop, DESC describes the number of iterations of the
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describes the loop, DESC describes the number of iterations of the
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loop, and DOLOOP_INSN is the low-overhead looping insn to emit at the
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loop, and DOLOOP_INSN is the low-overhead looping insn to emit at the
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end of the loop. CONDITION is the condition separated from the
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end of the loop. CONDITION is the condition separated from the
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DOLOOP_SEQ. COUNT is the number of iterations of the LOOP. */
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DOLOOP_SEQ. COUNT is the number of iterations of the LOOP.
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ZERO_EXTEND_P says to zero extend COUNT after the increment of it to
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word_mode. */
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static void
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static void
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doloop_modify (struct loop *loop, struct niter_desc *desc,
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doloop_modify (struct loop *loop, struct niter_desc *desc,
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rtx doloop_seq, rtx condition, rtx count)
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rtx doloop_seq, rtx condition, rtx count, bool zero_extend_p)
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{
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{
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rtx counter_reg;
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rtx counter_reg;
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rtx tmp, noloop = NULL_RTX;
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rtx tmp, noloop = NULL_RTX;
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@ -413,6 +415,10 @@ doloop_modify (struct loop *loop, struct niter_desc *desc,
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if (increment_count)
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if (increment_count)
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count = simplify_gen_binary (PLUS, mode, count, const1_rtx);
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count = simplify_gen_binary (PLUS, mode, count, const1_rtx);
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if (zero_extend_p)
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count = simplify_gen_unary (ZERO_EXTEND, word_mode,
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count, mode);
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/* Insert initialization of the count register into the loop header. */
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/* Insert initialization of the count register into the loop header. */
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start_sequence ();
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start_sequence ();
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tmp = force_operand (count, counter_reg);
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tmp = force_operand (count, counter_reg);
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@ -547,6 +553,7 @@ doloop_optimize (struct loop *loop)
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struct niter_desc *desc;
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struct niter_desc *desc;
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unsigned word_mode_size;
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unsigned word_mode_size;
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unsigned HOST_WIDE_INT word_mode_max;
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unsigned HOST_WIDE_INT word_mode_max;
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bool zero_extend_p = false;
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if (dump_file)
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if (dump_file)
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fprintf (dump_file, "Doloop: Processing loop %d.\n", loop->num);
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fprintf (dump_file, "Doloop: Processing loop %d.\n", loop->num);
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@ -621,8 +628,7 @@ doloop_optimize (struct loop *loop)
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{
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{
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if (word_mode_size > GET_MODE_BITSIZE (mode))
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if (word_mode_size > GET_MODE_BITSIZE (mode))
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{
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{
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count = simplify_gen_unary (ZERO_EXTEND, word_mode,
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zero_extend_p = true;
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count, mode);
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iterations = simplify_gen_unary (ZERO_EXTEND, word_mode,
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iterations = simplify_gen_unary (ZERO_EXTEND, word_mode,
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iterations, mode);
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iterations, mode);
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iterations_max = simplify_gen_unary (ZERO_EXTEND, word_mode,
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iterations_max = simplify_gen_unary (ZERO_EXTEND, word_mode,
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@ -666,7 +672,7 @@ doloop_optimize (struct loop *loop)
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return false;
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return false;
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}
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}
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doloop_modify (loop, desc, doloop_seq, condition, count);
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doloop_modify (loop, desc, doloop_seq, condition, count, zero_extend_p);
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return true;
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return true;
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}
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}
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