12.8 切片 5：WHILE 回环与四则运算。

- WHILE 编成 L_loop: <cond→t> JF t, L_end <body> JMP L_loop L_end:，JF/JMP 双回填 - 四则 ADD/SUB/MUL/DIV（用例 5 循环体自增需要，同模式实现，用例 7 顺带点亮） - codegen_test：115 断言（用例 05 回环 JMP -8、07 四则+比较、08 TIME 常量表），ctest 9/9
2026-08-21 11:45:32 +08:00
parent 6f1bf61c7f
commit 31ba557627
2 changed files with 168 additions and 9 deletions
@@ -397,6 +397,100 @@ static bool test_case04() {
    return true;
 }

+// ---- 10. 用例 05：WHILE 回环（JF 出口 + JMP 回填）----
+
+static bool test_case05() {
+    std::vector<uint8_t> img;
+    std::string err;
+    CHECK(compile_case("05_while_normal", &img, &err));
+
+    const isa::ImageView v = isa::ImageView::from(img);
+    CHECK(v.ok());
+    const isa::FuncRow r = v.func_row(0);
+    CHECK(r.nregs == 4);  // n + 3 临时（CMP 目的 + 两操作数）
+    CHECK(r.code_len == 10);
+
+    char buf[64];
+    const uint8_t* base = v.code_bytes();
+    const uint32_t* ins = reinterpret_cast<const uint32_t*>(base);
+    isa::disasm(ins[0], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "LOADK r0, 0") == 0);  // n := 0
+    // L_loop [1]：n < 10 → r1
+    isa::disasm(ins[1], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "MOVE r2, r0") == 0);
+    isa::disasm(ins[2], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "LOADK r3, 1") == 0);  // 常量 1 = 10
+    isa::disasm(ins[3], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "CMP_LT r1, r2, r3") == 0);
+    isa::disasm(ins[4], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "JF r1, +4") == 0);    // 假 → RET（[9]）
+    // n := n + 1（体语句临时复用 r1/r2）
+    isa::disasm(ins[5], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "MOVE r1, r0") == 0);
+    isa::disasm(ins[6], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "LOADK r2, 2") == 0);  // 常量 2 = 1
+    isa::disasm(ins[7], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "ADD r0, r1, r2") == 0);
+    isa::disasm(ins[8], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "JMP -8") == 0);       // 回 L_loop（[1]）
+    isa::disasm(ins[9], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "RET") == 0);
+    return true;
+}
+
+// ---- 11. 用例 07：四则 + 比较 ----
+
+static bool test_case07() {
+    std::vector<uint8_t> img;
+    std::string err;
+    CHECK(compile_case("07_int_arith", &img, &err));
+
+    const isa::ImageView v = isa::ImageView::from(img);
+    CHECK(v.ok());
+    const isa::FuncRow r = v.func_row(0);
+    CHECK(r.nregs == 6);  // a b c eq + 2 临时（语句间复用）
+
+    char buf[64];
+    const uint8_t* base = v.code_bytes();
+    const uint32_t* ins = reinterpret_cast<const uint32_t*>(base);
+    bool saw_mul = false, saw_div = false, saw_sub = false, saw_gt = false;
+    for (uint32_t i = 0; i < r.code_len; ++i) {
+        isa::disasm(ins[i], buf, sizeof buf);
+        if (std::strstr(buf, "MUL r0, ")) saw_mul = true;
+        if (std::strstr(buf, "DIV r1, ")) saw_div = true;
+        if (std::strstr(buf, "SUB r2, ")) saw_sub = true;
+        if (std::strstr(buf, "CMP_GT r3, ")) saw_gt = true;
+    }
+    CHECK(saw_mul && saw_div && saw_sub && saw_gt);
+    return true;
+}
+
+// ---- 12. 用例 08：TIME 字面量进常量表 ----
+
+static bool test_case08() {
+    std::vector<uint8_t> img;
+    std::string err;
+    CHECK(compile_case("08_time_literal", &img, &err));
+
+    const isa::ImageView v = isa::ImageView::from(img);
+    CHECK(v.ok());
+    CHECK(v.header().n_consts == 2);
+    const isa::ConstEntry c0 = v.const_entry(0);
+    CHECK(c0.tag == isa::types::Time && c0.value == 10);    // T#10ms
+    const isa::ConstEntry c1 = v.const_entry(1);
+    CHECK(c1.tag == isa::types::Time && c1.value == 1250);  // T#1s250ms
+
+    const isa::FuncRow r = v.func_row(0);
+    CHECK(r.nregs == 2);
+    char buf[64];
+    const uint32_t* ins = reinterpret_cast<const uint32_t*>(v.code_bytes());
+    isa::disasm(ins[0], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "LOADK r0, 0") == 0);
+    isa::disasm(ins[1], buf, sizeof buf);
+    CHECK(std::strcmp(buf, "LOADK r1, 1") == 0);
+    return true;
+}
+
 int main() {
    if (!test_case01()) return 1;
    if (!test_case02()) return 1;
@@ -407,6 +501,9 @@ int main() {
    if (!test_case03()) return 1;
    if (!test_not()) return 1;
    if (!test_case04()) return 1;
+    if (!test_case05()) return 1;
+    if (!test_case07()) return 1;
+    if (!test_case08()) return 1;
    std::printf("codegen_test: %d checks passed\n", g_checks);
    return 0;
 }