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From 98dc31743b94d5719c02c589e7cd652e95570b25 Mon Sep 17 00:00:00 2001
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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Thu, 6 Sep 2012 16:47:14 +0200
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Subject: [PATCH] tcg/optimize: add constant folding for brcond
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Reviewed-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 | 27 ++++++++++++++++++++++++++-
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1 file changed, 26 insertions(+), 1 deletion(-)
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diff --git a/tcg/optimize.c b/tcg/optimize.c
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index 1cb1f36..156e8d9 100644
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--- a/tcg/optimize.c
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+++ b/tcg/optimize.c
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@@ -603,6 +603,32 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
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args += 4;
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break;
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}
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+ CASE_OP_32_64(brcond):
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+ if (temps[args[0]].state == TCG_TEMP_CONST
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+ && temps[args[1]].state == TCG_TEMP_CONST) {
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+ if (do_constant_folding_cond(op, temps[args[0]].val,
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+ temps[args[1]].val, args[2])) {
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+ memset(temps, 0, nb_temps * sizeof(struct tcg_temp_info));
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+ gen_opc_buf[op_index] = INDEX_op_br;
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+ gen_args[0] = args[3];
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+ gen_args += 1;
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+ args += 4;
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+ } else {
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+ gen_opc_buf[op_index] = INDEX_op_nop;
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+ args += 4;
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+ }
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+ break;
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+ } else {
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+ memset(temps, 0, nb_temps * sizeof(struct tcg_temp_info));
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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;
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+ args += 4;
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+ break;
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+ }
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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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@@ -624,7 +650,6 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
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case INDEX_op_set_label:
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case INDEX_op_jmp:
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case INDEX_op_br:
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- CASE_OP_32_64(brcond):
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memset(temps, 0, nb_temps * sizeof(struct tcg_temp_info));
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for (i = 0; i < def->nb_args; i++) {
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*gen_args = *args;
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--
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1.7.12.1
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