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tcg/optimize: simplify and r, a, 0 cases

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and r, a, 0 is equivalent to a movi r, 0.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2012-09-06 16:47:14 +02:00
parent 38ee188b1b
commit 61251c0c79
1 changed files with 1 additions and 0 deletions
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tcg/optimize.c
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@ -360,6 +360,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
/* Simplify expression for "op r, a, 0 => movi r, 0" cases */ /* Simplify expression for "op r, a, 0 => movi r, 0" cases */
switch (op) { switch (op) {
CASE_OP_32_64(and):
CASE_OP_32_64(mul): CASE_OP_32_64(mul):
if ((temps[args[2]].state == TCG_TEMP_CONST if ((temps[args[2]].state == TCG_TEMP_CONST
&& temps[args[2]].val == 0)) { && temps[args[2]].val == 0)) {