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From c489b380d3f827be91b5f8b80b88585fb4014fbb Mon Sep 17 00:00:00 2001
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From: Richard Henderson <rth@twiddle.net>
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Date: Fri, 21 Sep 2012 10:13:37 -0700
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Subject: [PATCH] tcg: Optimize movcond for constant comparisons
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Signed-off-by: Richard Henderson <rth@twiddle.net>
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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tcg/optimize.c | 40 ++++++++++++++++++++++++++++++++++++++++
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1 file changed, 40 insertions(+)
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diff --git a/tcg/optimize.c b/tcg/optimize.c
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index 9da333c..26038a6 100644
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--- a/tcg/optimize.c
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+++ b/tcg/optimize.c
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@@ -394,6 +394,14 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
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args[3] = tcg_swap_cond(args[3]);
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}
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break;
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+ CASE_OP_32_64(movcond):
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+ if (temps[args[1]].state == TCG_TEMP_CONST
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+ && temps[args[2]].state != TCG_TEMP_CONST) {
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+ tmp = args[1];
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+ args[1] = args[2];
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+ args[2] = tmp;
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+ args[5] = tcg_swap_cond(args[5]);
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+ }
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default:
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break;
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}
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@@ -614,6 +622,38 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
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}
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args += 4;
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break;
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+ CASE_OP_32_64(movcond):
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+ if (temps[args[1]].state == TCG_TEMP_CONST
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+ && temps[args[2]].state == TCG_TEMP_CONST) {
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+ tmp = do_constant_folding_cond(op, temps[args[1]].val,
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+ temps[args[2]].val, args[5]);
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+ if (args[0] == args[4-tmp]
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+ || (temps[args[4-tmp]].state == TCG_TEMP_COPY
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+ && temps[args[4-tmp]].val == args[0])) {
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+ gen_opc_buf[op_index] = INDEX_op_nop;
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+ } else if (temps[args[4-tmp]].state == TCG_TEMP_CONST) {
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+ gen_opc_buf[op_index] = op_to_movi(op);
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+ tcg_opt_gen_movi(gen_args, args[0], temps[args[4-tmp]].val,
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+ nb_temps, nb_globals);
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+ gen_args += 2;
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+ } else {
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+ gen_opc_buf[op_index] = op_to_mov(op);
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+ tcg_opt_gen_mov(gen_args, args[0], args[4-tmp],
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+ nb_temps, nb_globals);
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+ gen_args += 2;
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+ }
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+ } else {
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+ reset_temp(args[0], nb_temps, nb_globals);
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+ gen_args[0] = args[0];
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+ gen_args[1] = args[1];
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+ gen_args[2] = args[2];
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+ gen_args[3] = args[3];
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+ gen_args[4] = args[4];
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+ gen_args[5] = args[5];
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+ gen_args += 6;
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+ }
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+ args += 6;
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+ break;
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case INDEX_op_call:
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nb_call_args = (args[0] >> 16) + (args[0] & 0xffff);
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if (!(args[nb_call_args + 1] & (TCG_CALL_CONST | TCG_CALL_PURE))) {
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--
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1.7.12.1
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