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examples: Add a while loop example

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Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
This commit is contained in:
Anatol Belski 2023-05-18 22:41:14 +02:00
parent 764f5c3985
commit d64a2b5493
3 changed files with 65 additions and 2 deletions
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2
Makefile
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@ -47,7 +47,7 @@ OBJS_COMMON = $(BUILD_DIR)/ir.o $(BUILD_DIR)/ir_strtab.o $(BUILD_DIR)/ir_cfg.o \
$(BUILD_DIR)/ir_cpuinfo.o
OBJS_IR = $(BUILD_DIR)/ir_main.o
OBJS_IR_TEST = $(BUILD_DIR)/ir_test.o
EXAMPLE_EXES = $(EXAMPLES_BUILD_DIR)/0001-basic $(EXAMPLES_BUILD_DIR)/0005-basic-runner-func
EXAMPLE_EXES = $(EXAMPLES_BUILD_DIR)/0001-basic $(EXAMPLES_BUILD_DIR)/0001-while $(EXAMPLES_BUILD_DIR)/0005-basic-runner-func
all: $(BUILD_DIR) $(BUILD_DIR)/ir $(BUILD_DIR)/ir_test

63
examples/0001-while.c Normal file
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@ -0,0 +1,63 @@
/*
* IR - Lightweight JIT Compilation Framework
* (Exmaples package)
* Copyright (C) 2023 by IR project.
* Authors: Anatol Belski <anbelski@linux.microsoft.com>
*/
#include "ir.h"
#include "ir_builder.h"
#include <stdlib.h>
/*
* int32_t myfunc() {
* int32_t i = 0;
* while (i++ < 42);
* return i;
* }
*/
typedef int32_t (*myfunc_t)(void);
void gen_myfunc(ir_ctx *ctx)
{
ir_START();
ir_ref i = ir_COPY_I32(ir_CONST_I32(0));
ir_ref loop = ir_LOOP_BEGIN(ir_END());
ir_ref phi_i_1 = ir_PHI_2(i, IR_UNUSED);
ir_ref cond = ir_IF(ir_GE(phi_i_1, ir_CONST_I32(42)));
ir_IF_TRUE(cond);
ir_ref loop_end = ir_LOOP_END();
ir_IF_FALSE(cond);
ir_ref i_2 = ir_ADD_I32(phi_i_1, ir_CONST_I32(1));
/* close loop */
ir_MERGE_SET_OP(loop, 2, loop_end);
ir_PHI_SET_OP(phi_i_1, 2, i_2);
ir_RETURN(i_2);
}
int main(int argc, char **argv)
{
ir_ctx ctx = {0};
ir_consistency_check();
ir_init(&ctx, IR_FUNCTION, IR_CONSTS_LIMIT_MIN, IR_INSNS_LIMIT_MIN);
gen_myfunc(&ctx);
ir_build_def_use_lists(&ctx);
ir_build_cfg(&ctx);
ir_match(&ctx);
ir_assign_virtual_registers(&ctx);
size_t size;
void *entry = ir_emit_code(&ctx, &size);
if (entry) {
printf("%d\n", ((myfunc_t)entry)());
}
ir_free(&ctx);
return 0;
}

2
win32/Makefile
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@ -71,7 +71,7 @@ OBJS_COMMON=$(BUILD_DIR)\ir.obj $(BUILD_DIR)\ir_strtab.obj $(BUILD_DIR)\ir_cfg.o
$(BUILD_DIR)\ir_disasm.obj $(BUILD_DIR)\ir_check.obj $(BUILD_DIR)\ir_cpuinfo.obj
OBJS_IR = $(BUILD_DIR)\ir_main.obj
OBJS_IR_TEST = $(BUILD_DIR)\ir_test.obj
EXAMPLE_EXES = $(EXAMPLES_BUILD_DIR)\0001-basic.exe $(EXAMPLES_BUILD_DIR)\0005-basic-runner-func.exe
EXAMPLE_EXES = $(EXAMPLES_BUILD_DIR)\0001-basic.exe $(EXAMPLES_BUILD_DIR)\0001-while.exe $(EXAMPLES_BUILD_DIR)\0005-basic-runner-func.exe
all: $(BUILD_DIR) $(BUILD_DIR)\ir.exe $(BUILD_DIR)\ir_test.exe