From 8a99a0e875f2de8bf47e6fd27523723176251333 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Wed, 31 Oct 2012 00:50:15 +0100 Subject: [PATCH] tcg: don't remove op if output needs to be synced to memory 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. Signed-off-by: Aurelien Jarno --- tcg/tcg.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/tcg/tcg.c b/tcg/tcg.c index c3a7f19..1133438 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -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; -- 1.7.2.5