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64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
/*
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* IR - Lightweight JIT Compilation Framework
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* (Exmaples package)
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* Copyright (C) 2023 by IR project.
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* Authors: Anatol Belski <anbelski@linux.microsoft.com>
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*/
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#include "ir.h"
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#include "ir_builder.h"
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#include <stdlib.h>
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/*
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* int32_t myfunc() {
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* int32_t i = 0;
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* while (i++ < 42);
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* return i;
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* }
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*/
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typedef int32_t (*myfunc_t)(void);
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void gen_myfunc(ir_ctx *ctx)
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{
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ir_START();
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ir_ref i = ir_COPY_I32(ir_CONST_I32(0));
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ir_ref loop = ir_LOOP_BEGIN(ir_END());
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ir_ref phi_i_1 = ir_PHI_2(i, IR_UNUSED);
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ir_ref cond = ir_IF(ir_GE(phi_i_1, ir_CONST_I32(42)));
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ir_IF_TRUE(cond);
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ir_ref loop_end = ir_LOOP_END();
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ir_IF_FALSE(cond);
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ir_ref i_2 = ir_ADD_I32(phi_i_1, ir_CONST_I32(1));
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/* close loop */
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ir_MERGE_SET_OP(loop, 2, loop_end);
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ir_PHI_SET_OP(phi_i_1, 2, i_2);
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ir_RETURN(i_2);
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}
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int main(int argc, char **argv)
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{
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ir_ctx ctx = {0};
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ir_consistency_check();
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ir_init(&ctx, IR_FUNCTION, IR_CONSTS_LIMIT_MIN, IR_INSNS_LIMIT_MIN);
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gen_myfunc(&ctx);
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ir_build_def_use_lists(&ctx);
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ir_build_cfg(&ctx);
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ir_match(&ctx);
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ir_assign_virtual_registers(&ctx);
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size_t size;
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void *entry = ir_emit_code(&ctx, &size);
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if (entry) {
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printf("%d\n", ((myfunc_t)entry)());
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}
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ir_free(&ctx);
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return 0;
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}
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