Class TestC

chapter23/src/test/java/com/seaofnodes/simple/TestC.java:15–122

// Call a C driver program, which calls a Simple-generated .o, and self-checks.
// Expects GCC from the default CLI, compiles C, compiles Simple, links and runs.
public abstract class TestC {

    public static final String OS  = System.getProperty("os.name");
    public static final String CPU = System.getProperty("os.arch");

    public static final String CALL_CONVENTION = OS.startsWith("Windows") ? "Win64" : "SystemV";
    public static final String CPU_PORT = switch( CPU ) {
        case "amd64" -> "x86_64_v2";
        default -> throw Utils.TODO("Map Yer CPU Port Here");
    };

    public static void run( String file, int spills ) throws IOException { run(file,"",spills); }

    public static void run( String file, String expected, int spills ) throws IOException {
        run("src/test/java/com/seaofnodes/simple/progs",file,expected,spills);
    }

    // Compile and run a simple program
    public static void run( String dir, String file, TypeInteger arg, String expected, int spills, boolean standalone) throws IOException {
        // Files
        String  cfile = dir+"/"+file+".c"  ;
        String  sfile = dir+"/"+file+".smp";
        String  efile = "build/objs/"+file;

        // Compile and export Simple
        String src = Files.readString(Path.of(sfile));
        run(src,CALL_CONVENTION,arg, "",standalone? null: cfile,efile,"S",expected,spills);
    }
    public static void run(String dir, String file, String expected, int spills ) throws IOException {
        run(dir, file,null, expected, spills, false);
    }

    public static void runS(String file, String expected, int spills ) throws IOException {
        run("src/test/java/com/seaofnodes/simple/progs", file, null, expected, spills, true);
    }

    public static void runS(String file, TypeInteger arg, String expected, int spills ) throws IOException {
        run("src/test/java/com/seaofnodes/simple/progs", file, arg, expected, spills, true);
    }


    public static void run( String src, String simple_conv, TypeInteger arg, String c_conv, String cfile, String efile, String xtn, String expected, int spills ) throws IOException {
        String bin = efile+xtn;
        String obj = bin+".o";
        String exe = OS.startsWith("Windows") ? bin+".exe" : bin;
        // Compile simple, emit ELF
        CodeGen code = new CodeGen(src, arg).driver( CPU_PORT, simple_conv, obj);

        String result = gcc(obj, c_conv, cfile, false, exe );
        assertEquals(expected,result);

        // Allocation quality not degraded
        int delta = spills>>3;
        if( delta==0 ) delta = 1;
        if( spills != -1 )
            assertEquals("Expect spills:",spills,code._regAlloc._spillScaled,delta);
    }