tcg/optimize: Split out fold_xi_to_i
Pull the "op r, a, 0 => movi r, 0" optimization into a function, and use it in the outer opcode fold functions. Reviewed-by: Luis Pires <luis.pires@eldorado.org.br> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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@ -695,6 +695,15 @@ static bool fold_const2(OptContext *ctx, TCGOp *op)
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return false;
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}
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/* If the binary operation has second argument @i, fold to @i. */
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static bool fold_xi_to_i(OptContext *ctx, TCGOp *op, uint64_t i)
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{
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if (arg_is_const(op->args[2]) && arg_info(op->args[2])->val == i) {
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return tcg_opt_gen_movi(ctx, op, op->args[0], i);
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}
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return false;
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}
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/* If the binary operation has both arguments equal, fold to @i. */
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static bool fold_xx_to_i(OptContext *ctx, TCGOp *op, uint64_t i)
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{
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@ -763,6 +772,7 @@ static bool fold_add2_i32(OptContext *ctx, TCGOp *op)
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static bool fold_and(OptContext *ctx, TCGOp *op)
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{
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if (fold_const2(ctx, op) ||
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fold_xi_to_i(ctx, op, 0) ||
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fold_xx_to_x(ctx, op)) {
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return true;
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}
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@ -1081,12 +1091,20 @@ static bool fold_movcond(OptContext *ctx, TCGOp *op)
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static bool fold_mul(OptContext *ctx, TCGOp *op)
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{
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return fold_const2(ctx, op);
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if (fold_const2(ctx, op) ||
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fold_xi_to_i(ctx, op, 0)) {
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return true;
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}
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return false;
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}
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static bool fold_mul_highpart(OptContext *ctx, TCGOp *op)
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{
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return fold_const2(ctx, op);
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if (fold_const2(ctx, op) ||
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fold_xi_to_i(ctx, op, 0)) {
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return true;
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}
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return false;
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}
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static bool fold_mulu2_i32(OptContext *ctx, TCGOp *op)
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@ -1753,22 +1771,6 @@ void tcg_optimize(TCGContext *s)
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continue;
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}
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/* Simplify expression for "op r, a, 0 => movi r, 0" cases */
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switch (opc) {
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CASE_OP_32_64_VEC(and):
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CASE_OP_32_64_VEC(mul):
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CASE_OP_32_64(muluh):
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CASE_OP_32_64(mulsh):
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if (arg_is_const(op->args[2])
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&& arg_info(op->args[2])->val == 0) {
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tcg_opt_gen_movi(&ctx, op, op->args[0], 0);
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continue;
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}
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break;
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default:
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break;
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}
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/*
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* Process each opcode.
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* Sorted alphabetically by opcode as much as possible.
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