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authorRichard Henderson <rth@twiddle.net>2012-10-02 11:32:28 -0700
committerAurelien Jarno <aurelien@aurel32.net>2012-10-17 17:51:37 +0200
commit212c328d615f6750659d39c6fd544d05be314fa1 (patch)
tree27fd57087428b1ae51c499b06cbe38999b5a6113 /tcg/tcg-op.h
parent6c4382f8f47d12eec24c7c5335141a9c78104016 (diff)
tcg: Constant fold add2 and sub2
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg/tcg-op.h')
-rw-r--r--tcg/tcg-op.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index 551845801d..a580cfea07 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -25,6 +25,11 @@
int gen_new_label(void);
+static inline void tcg_gen_op0(TCGOpcode opc)
+{
+ *gen_opc_ptr++ = opc;
+}
+
static inline void tcg_gen_op1_i32(TCGOpcode opc, TCGv_i32 arg1)
{
*gen_opc_ptr++ = opc;
@@ -886,6 +891,8 @@ static inline void tcg_gen_add_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
tcg_gen_op6_i32(INDEX_op_add2_i32, TCGV_LOW(ret), TCGV_HIGH(ret),
TCGV_LOW(arg1), TCGV_HIGH(arg1), TCGV_LOW(arg2),
TCGV_HIGH(arg2));
+ /* Allow the optimizer room to replace add2 with two moves. */
+ tcg_gen_op0(INDEX_op_nop);
}
static inline void tcg_gen_sub_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
@@ -893,6 +900,8 @@ static inline void tcg_gen_sub_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
tcg_gen_op6_i32(INDEX_op_sub2_i32, TCGV_LOW(ret), TCGV_HIGH(ret),
TCGV_LOW(arg1), TCGV_HIGH(arg1), TCGV_LOW(arg2),
TCGV_HIGH(arg2));
+ /* Allow the optimizer room to replace sub2 with two moves. */
+ tcg_gen_op0(INDEX_op_nop);
}
static inline void tcg_gen_and_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)