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[Qemu-devel] [PATCH 2/3] tcg: mark dead output argument in op_dead_args
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH 2/3] tcg: mark dead output argument in op_dead_args |
Date: |
Tue, 17 May 2011 18:28:19 +0200 |
If an op is not removed and has dead output arguments, mark it
in op_dead_args similarly to what is done for input arguments.
Signed-off-by: Aurelien Jarno <address@hidden>
---
tcg/tcg.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 9a48cb9..82d3e1d 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1245,8 +1245,12 @@ static void tcg_liveness_analysis(TCGContext *s)
do_not_remove_call:
/* output args are dead */
+ dead_args = 0;
for(i = 0; i < nb_oargs; i++) {
arg = args[i];
+ if (dead_temps[arg]) {
+ dead_args |= (1 << i);
+ }
dead_temps[arg] = 1;
}
@@ -1256,7 +1260,6 @@ static void tcg_liveness_analysis(TCGContext *s)
}
/* input args are live */
- dead_args = 0;
for(i = nb_oargs; i < nb_iargs + nb_oargs; i++) {
arg = args[i];
if (arg != TCG_CALL_DUMMY_ARG) {
@@ -1313,8 +1316,12 @@ static void tcg_liveness_analysis(TCGContext *s)
do_not_remove:
/* output args are dead */
+ dead_args = 0;
for(i = 0; i < nb_oargs; i++) {
arg = args[i];
+ if (dead_temps[arg]) {
+ dead_args |= (1 << i);
+ }
dead_temps[arg] = 1;
}
@@ -1327,7 +1334,6 @@ static void tcg_liveness_analysis(TCGContext *s)
}
/* input args are live */
- dead_args = 0;
for(i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
arg = args[i];
if (dead_temps[arg]) {
--
1.7.2.3