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tcg: don't remove op if output needs to be synced to memory

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Commit 9c43b68de628a1e2cba556adfb71c17028eb802e do not correctly check
for dead outputs when they need to be synced to memory in case of
half-dead operations.

Fix that by applying the same pattern than for the default case.

Tested-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2012-10-31 00:50:15 +01:00
parent e1e1b25c97
commit b3a1be87ba
1 changed files with 4 additions and 4 deletions
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8
tcg/tcg.c
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@ -1329,8 +1329,8 @@ static void tcg_liveness_analysis(TCGContext *s)
the low part. The result can be optimized to a simple
add or sub. This happens often for x86_64 guest when the
cpu mode is set to 32 bit. */
if (dead_temps[args[1]]) {
if (dead_temps[args[0]]) {
if (dead_temps[args[1]] && !mem_temps[1]) {
if (dead_temps[args[0]] && !mem_temps[0]) {
goto do_remove;
}
/* Create the single operation plus nop. */
@ -1355,8 +1355,8 @@ static void tcg_liveness_analysis(TCGContext *s)
nb_iargs = 2;
nb_oargs = 2;
/* Likewise, test for the high part of the operation dead. */
if (dead_temps[args[1]]) {
if (dead_temps[args[0]]) {
if (dead_temps[args[1]] && !mem_temps[1]) {
if (dead_temps[args[0]] && !mem_temps[0]) {
goto do_remove;
}
gen_opc_buf[op_index] = op = INDEX_op_mul_i32;