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Only arguments passed on stack must be in regisers (to avoid mem->mem copy)

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This commit is contained in:
Dmitry Stogov 2022-05-16 10:50:50 +03:00
parent e8dd422167
commit cebcde2143
1 changed files with 8 additions and 1 deletions
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9
ir_x86.dasc
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@ -781,7 +781,14 @@ uint8_t ir_get_use_flags(ir_ctx *ctx, ir_ref ref, int op_num)
}
case IR_CALL:
case IR_TAILCALL:
return (op_num == 2) ? IR_USE_SHOULD_BE_IN_REG : IR_USE_MUST_BE_IN_REG;
if (op_num > 2) {
insn = &ctx->ir_base[ref];
if (ir_get_arg_reg(ctx, insn, op_num) == IR_REG_NONE) {
return IR_USE_MUST_BE_IN_REG;
}
return IR_USE_SHOULD_BE_IN_REG;
}
return IR_USE_SHOULD_BE_IN_REG;
case IR_SKIP_REG: /* PARAM PHI PI */
insn = &ctx->ir_base[ref];
if (insn->op == IR_PARAM && op_num == 0) {