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tcg/optimize: optimize "op r, a, a => mov r, a" 

Now that we can easily detect all copies, we can optimize the
"op r, a, a => mov r, a" case a bit more.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2012-09-18 19:11:32 +02:00
parent 1ff8c5418a
commit 0aba1c7376
1 changed files with 1 additions and 1 deletions
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tcg/optimize.c
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@ -524,7 +524,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
switch (op) { switch (op) {
CASE_OP_32_64(or): CASE_OP_32_64(or):
CASE_OP_32_64(and): CASE_OP_32_64(and):
if (args[1] == args[2]) { if (temps_are_copies(args[1], args[2])) {
if (temps_are_copies(args[0], args[1])) { if (temps_are_copies(args[0], args[1])) {
gen_opc_buf[op_index] = INDEX_op_nop; gen_opc_buf[op_index] = INDEX_op_nop;
} else { } else {