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[Qemu-devel] [PATCH for 1.5] tcg/optimize: fix setcond2 optimization
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH for 1.5] tcg/optimize: fix setcond2 optimization |
Date: |
Wed, 8 May 2013 22:42:42 +0200 |
When setcond2 is rewritten into setcond, the state of the destination
temp should be reset, so that a copy of the previous value is not
used instead of the result.
Reported-by: Michael Tokarev <address@hidden>
Cc: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
tcg/optimize.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 1b6644c..b35868a 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1057,6 +1057,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s,
uint16_t *tcg_opc_ptr,
/* Simplify LT/GE comparisons vs zero to a single compare
vs the high word of the input. */
s->gen_opc_buf[op_index] = INDEX_op_setcond_i32;
+ reset_temp(args[0]);
gen_args[0] = args[0];
gen_args[1] = args[2];
gen_args[2] = args[4];
--
1.7.10.4
- [Qemu-devel] [PATCH for 1.5] tcg/optimize: fix setcond2 optimization,
Aurelien Jarno <=