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[Qemu-devel] [PULL 7/9] tcg/optimize: fold temp copies test in tcg_opt_g
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 7/9] tcg/optimize: fold temp copies test in tcg_opt_gen_mov |
Date: |
Tue, 9 Jun 2015 07:13:03 -0700 |
From: Aurelien Jarno <address@hidden>
Each call to tcg_opt_gen_mov is preceeded by a test to check if the
source and destination temps are copies. Fold that into the
tcg_opt_gen_mov function.
Cc: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/optimize.c | 27 +++++++++------------------
1 file changed, 9 insertions(+), 18 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index db15976..d5c0398 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -196,6 +196,11 @@ static bool temps_are_copies(TCGArg arg1, TCGArg arg2)
static void tcg_opt_gen_mov(TCGContext *s, TCGOp *op, TCGArg *args,
TCGArg dst, TCGArg src)
{
+ if (temps_are_copies(dst, src)) {
+ tcg_op_remove(s, op);
+ return;
+ }
+
TCGOpcode new_op = op_to_mov(op->opc);
tcg_target_ulong mask;
@@ -788,11 +793,7 @@ static void tcg_constant_folding(TCGContext *s)
}
break;
do_mov3:
- if (temps_are_copies(args[0], args[1])) {
- tcg_op_remove(s, op);
- } else {
- tcg_opt_gen_mov(s, op, args, args[0], args[1]);
- }
+ tcg_opt_gen_mov(s, op, args, args[0], args[1]);
continue;
default:
break;
@@ -947,9 +948,7 @@ static void tcg_constant_folding(TCGContext *s)
}
if (affected == 0) {
assert(nb_oargs == 1);
- if (temps_are_copies(args[0], args[1])) {
- tcg_op_remove(s, op);
- } else if (temps[args[1]].state != TCG_TEMP_CONST) {
+ if (temps[args[1]].state != TCG_TEMP_CONST) {
tcg_opt_gen_mov(s, op, args, args[0], args[1]);
} else {
tcg_opt_gen_movi(s, op, args,
@@ -979,9 +978,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(or):
CASE_OP_32_64(and):
if (temps_are_copies(args[1], args[2])) {
- if (temps_are_copies(args[0], args[1])) {
- tcg_op_remove(s, op);
- } else if (temps[args[1]].state != TCG_TEMP_CONST) {
+ if (temps[args[1]].state != TCG_TEMP_CONST) {
tcg_opt_gen_mov(s, op, args, args[0], args[1]);
} else {
tcg_opt_gen_movi(s, op, args,
@@ -1013,10 +1010,6 @@ static void tcg_constant_folding(TCGContext *s)
allocator where needed and possible. Also detect copies. */
switch (opc) {
CASE_OP_32_64(mov):
- if (temps_are_copies(args[0], args[1])) {
- tcg_op_remove(s, op);
- break;
- }
if (temps[args[1]].state != TCG_TEMP_CONST) {
tcg_opt_gen_mov(s, op, args, args[0], args[1]);
break;
@@ -1118,9 +1111,7 @@ static void tcg_constant_folding(TCGContext *s)
CASE_OP_32_64(movcond):
tmp = do_constant_folding_cond(opc, args[1], args[2], args[5]);
if (tmp != 2) {
- if (temps_are_copies(args[0], args[4-tmp])) {
- tcg_op_remove(s, op);
- } else if (temps[args[4-tmp]].state == TCG_TEMP_CONST) {
+ if (temps[args[4-tmp]].state == TCG_TEMP_CONST) {
tcg_opt_gen_movi(s, op, args,
args[0], temps[args[4-tmp]].val);
} else {
--
2.4.2
- [Qemu-devel] [PULL 0/9] tcg patch queue, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 1/9] tcg: Mask TCGMemOp appropriately for indexing, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 2/9] tcg: Handle MO_AMASK in tcg_dump_ops, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 3/9] tcg: fix register allocation with two aliased dead inputs, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 4/9] tcg: fix dead computation for repeated input arguments, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 5/9] tcg/optimize: remove opc argument from tcg_opt_gen_movi, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 7/9] tcg/optimize: fold temp copies test in tcg_opt_gen_mov,
Richard Henderson <=
- [Qemu-devel] [PULL 6/9] tcg/optimize: remove opc argument from tcg_opt_gen_mov, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 9/9] tcg/optimize: rename tcg_constant_folding, Richard Henderson, 2015/06/09
- [Qemu-devel] [PULL 8/9] tcg/optimize: fold constant test in tcg_opt_gen_mov, Richard Henderson, 2015/06/09
- Re: [Qemu-devel] [PULL 0/9] tcg patch queue, Peter Maydell, 2015/06/09