Various quality-of-life improvements (ideas from @33577 )

* Very basic `hello_main.c`
* Big starting hint to `write_c`
* Better error messages on failed test
  * TODO: also improve it for asmgen, but not sure how to do it in a good way

examples/c/array.c

@@ -1,4 +1,4 @@
-int sum(int len, int *p) {
+int sum(int len, int* p) {
     int result = 0;
     for (int i = 0; i < len; i++) {
         result += p[i];
@@ -10,7 +10,7 @@ int sum(int len, int *p) {
 int main() {
     int a[5];
     int len = 5;
-    
+
     for (int i = 0; i < len; i++) {
         a[i] = i;
     }

examples/c/array3.c

@@ -1,12 +1,12 @@
-int* foo(int a[10]){
+int* foo(int a[10]) {
     return a;
 }
 
 int main() {
     int a[10];
-    
+
     for (int i = 0; i < 10; i++) {
-	    (foo(a))[i] = i;
+        (foo(a))[i] = i;
     }
 
     return a[5] == 5;

examples/c/array4.c

@@ -1,9 +1,9 @@
 int main() {
     int a[10];
-    int *p = a; 
-    
+    int* p = a;
+
     for (int i = 0; i < 10; i++) {
-	    *(p++) = i;
+        *(p++) = i;
     }
 
     return a[5] == 5;

examples/c/array5.c

@@ -5,10 +5,10 @@ int main() {
     int a[5] = {init, 2, 3, 4, -5};
     int sum = 0;
 
-    for(int i = 0; i < 5; i++) {
+    for (int i = 0; i < 5; i++) {
         sum += a[i];
         sum += g_a[i];
     }
-    
+
     return sum;
 }

examples/c/bar.c

@@ -1,8 +1,11 @@
-int bar(int x, int y, int z){
+int bar(int x, int y, int z) {
     int arith_mean = (x + y + z) / 3;
     int ugly_mean = (((x + y) / 2) * 2 + z) / 3;
-    if (x == y) { return y; }
-    else { return z; }
+    if (x == y) {
+        return y;
+    } else {
+        return z;
+    }
 }
 
 int main() {

examples/c/bitwise.c

@@ -2,12 +2,12 @@ int main() {
     unsigned char a = -1;
     unsigned char b = -128;
     unsigned char c = 127;
-    unsigned char d = b | a; // -1 (255)
-    unsigned char e = b & a; // -128 (128)
-    unsigned char f = b & c; // 0 (0)
-    unsigned char g = b | c; // -1 (255)
-    unsigned char h = -1 ^ -1; // 0 (0)
-    unsigned char i = -1 ^ 0; // -1 (255)
-    
+    unsigned char d = b | a;    // -1 (255)
+    unsigned char e = b & a;    // -128 (128)
+    unsigned char f = b & c;    // 0 (0)
+    unsigned char g = b | c;    // -1 (255)
+    unsigned char h = -1 ^ -1;  // 0 (0)
+    unsigned char i = -1 ^ 0;   // -1 (255)
+
     return d == 255 && e == 128 && f == 0 && g == 255 && h == 0 && i == 255;
 }

examples/c/cmp.c

@@ -1,11 +1,15 @@
 int int_greater_than(int i, unsigned int j) {
-    if (i > j) return 1;
-    else return 0;
+    if (i > j)
+        return 1;
+    else
+        return 0;
 }
 
 int char_greater_than(char i, unsigned char j) {
-    if (i > j) return 1;
-    else return 0;
+    if (i > j)
+        return 1;
+    else
+        return 0;
 }
 
 int main() {

examples/c/comma.c

@@ -1,5 +1,4 @@
-int main()
-{
+int main() {
     int y = 2;
     int x = (y += 2, 2, y + 3);
     return x == 7;

examples/c/complement.c

@@ -1,4 +1,4 @@
-int nonce = 1; // For random input
+int nonce = 1;  // For random input
 
 int main() {
     int a = ~nonce;

examples/c/cond.c

@@ -1,5 +1,4 @@
-int main()
-{
+int main() {
     int y = 1;
     int x = 0;
     return ((x == y) ? 2 : 5) == 5;

examples/c/cond_and_loop.c

@@ -1,4 +1,4 @@
-int nonce = 1; // For random input
+int nonce = 1;  // For random input
 
 int main() {
     int i;
@@ -8,8 +8,11 @@ int main() {
     int loop_num = nonce % 100;
 
     for (i = 0; i < loop_num; ((i % 2) ? (i += 2) : ++i)) {
-        if (i % 2) { p += q; }
-        else { p += r; } 
+        if (i % 2) {
+            p += q;
+        } else {
+            p += r;
+        }
     }
 
     return p;

examples/c/fib2.c

@@ -1,4 +1,4 @@
-int (fibonacci)(int n) {
+int fibonacci(int n) {
     if (n < 2) {
         return n;
     }

examples/c/fibonacci.c

@@ -1,4 +1,4 @@
-int nonce = 1; // For random input
+int nonce = 1;  // For random input
 
 int fibonacci(int n) {
     if (n < 2) {

examples/c/float.c

@@ -14,22 +14,22 @@ double average(int len, int a[10]) {
     int sum = 0;
     int i;
 
-    for(i = 0; i < len; i++) {
+    for (i = 0; i < len; i++) {
         sum += a[i];
     }
 
-    return (double) sum / len;
+    return (double)sum / len;
 }
 
 int main() {
     int a[10];
     int len = 10;
-    
+
     for (int i = 0; i < len; i++) {
         a[i] = i;
     }
 
     float avg = average(len, a);
-    
+
     return is_close(avg, 4.5, 1e-09, 0.1);
 }

examples/c/foo.c

@@ -1,6 +1,9 @@
-int foo(int x, int y, int z){
-    if (x == y) { return y; }
-    else { return z; }
+int foo(int x, int y, int z) {
+    if (x == y) {
+        return y;
+    } else {
+        return z;
+    }
 }
 
 int main() {

examples/c/foo2.c

@@ -4,6 +4,6 @@ int main() {
         int i = 0;
         int k = 0;
     }
-    
+
     return 1;
 }

examples/c/foo3.c

@@ -1,11 +1,11 @@
-int nonce = 1; // For random input
+int nonce = 1;  // For random input
 int g = 10;
 
 int foo(int, int k);
 
 int main() {
     int i = g;
-    
+
     return foo(i, i);
 }
 

examples/c/foo4.c

@@ -1,15 +1,15 @@
 int foo(int i, int j, int k) {
-  return i + j + k;
+    return i + j + k;
 }
 
-int (* foo2())(int, int, int){
-  return foo;
+int (*foo2())(int, int, int) {
+    return foo;
 }
 
-int (* (* foo3())())(int, int, int){
-  return foo2;
+int (*(*foo3())())(int, int, int) {
+    return foo2;
 }
 
 int main() {
-  return foo3()()(2, 2, 2) == 6;
+    return foo3()()(2, 2, 2) == 6;
 }

examples/c/for_continue_break.c

@@ -1,9 +1,10 @@
 int foo() {
     int sum = 0;
 
-    for(int i = 0; ;) {
-        if(i == 5) break;
-        if(i == 3) {
+    for (int i = 0;;) {
+        if (i == 5)
+            break;
+        if (i == 3) {
             i++;
             continue;
         }

examples/c/gcd.c

@@ -2,9 +2,12 @@ int gcd(int a, int b) {
     a = (a > 0) ? a : -a;
     b = (b > 0) ? b : -b;
 
-    while(a != b) {
-        if(a > b) { a -= b; }
-        else { b -= a; }
+    while (a != b) {
+        if (a > b) {
+            a -= b;
+        } else {
+            b -= a;
+        }
     }
 
     return a;

examples/c/hello_main.c

@@ -0,0 +1,3 @@
+int main() {
+    return 1;
+}

examples/c/lost_copy.c

@@ -1,9 +1,9 @@
 int main() {
-  int i = 0;
-  int result = 0;
-  do {
-    result = i;
-    i++;
-  } while (i < 4);
-  return result;
+    int i = 0;
+    int result = 0;
+    do {
+        result = i;
+        i++;
+    } while (i < 4);
+    return result;
 }

examples/c/negate.c

@@ -1,6 +1,9 @@
-int foo(int x, int y, int z){
-    if (!(x == y)) { return y; }
-    else { return z; }
+int foo(int x, int y, int z) {
+    if (!(x == y)) {
+        return y;
+    } else {
+        return z;
+    }
 }
 
 int main() {

examples/c/pointer.c

@@ -1,15 +1,15 @@
-int* foo(int *a){
-   return a;
+int* foo(int* a) {
+    return a;
 }
 
-int main(){
+int main() {
     int a = 1;
-    int *p = &a;
-    int **p2 = &*&p;
-    int *p3 = *&p;
+    int* p = &a;
+    int** p2 = &*&p;
+    int* p3 = *&p;
 
     *&*foo(*p2) += 1;
     *foo(p3) += 1;
-    
+
     return a == 3;
 }

examples/c/simple.c

@@ -1,7 +1,6 @@
-int nonce = 1; // For random input
+int nonce = 1;  // For random input
 
-int main()
-{
+int main() {
     int x = nonce;
     return x;
 }

examples/c/simple_for.c

@@ -1,9 +1,8 @@
-int main()
-{
+int main() {
     int i;
     int sum = 0;
-    for (i = 0; i < 11; ++i) { 
-        sum += i; 
+    for (i = 0; i < 11; ++i) {
+        sum += i;
     }
     return sum == 55;
 }

examples/c/simple_if.c

@@ -1,4 +1,4 @@
-int (fibonacci)(int n) {
+int fibonacci(int n) {
     if (n < 2) {
         n += 2;
     }

examples/c/sizeof4.c

@@ -1,5 +1,4 @@
-int main()
-{
+int main() {
     int a = 3;
     int b = sizeof(!(a++));
     return a + b;

examples/c/struct.c

@@ -1,9 +1,9 @@
 typedef struct {
-  char a;
-  struct {
-    int b[4][5];
-  };
-  double c;
+    char a;
+    struct {
+        int b[4][5];
+    };
+    double c;
 } Temp;
 
 void init(int row, int col, int arr[4][5]) {
@@ -21,6 +21,6 @@ int main() {
 
     Temp temp2;
     temp2 = temp;
-    
+
     return temp2.b[2][3] == 6;
 }

examples/c/struct2.c

@@ -1,18 +1,18 @@
 typedef struct {
-  char a;
-  struct {
-    int b[4];
-  };
-  long c;
+    char a;
+    struct {
+        int b[4];
+    };
+    long c;
 } Temp;
 
 int main() {
     const Temp temp = {1, {{2, 3, 4, 5}}, 6};
-    
+
     Temp temp2;
     temp2 = temp;
 
     int sum = temp2.a + temp2.b[2] + temp2.c;
-    
+
     return sum == 11;
 }

examples/c/struct4.c

@@ -1,19 +1,16 @@
-int nonce = 1; // For random input
+int nonce = 1;  // For random input
 
-struct Foo
-{
+struct Foo {
     int x;
 };
 
-struct Foo f()
-{
+struct Foo f() {
     struct Foo x;
     x.x = nonce;
     return x;
 }
 
-int main()
-{
+int main() {
     int x = f().x;
     return x;
 }

examples/c/swap.c

@@ -1,10 +1,10 @@
 int main() {
-  int a = 1;
-  int b = 2;
-  do {
-    int t = a;
-    a = b;
-    b = t;
-  } while (b == 1);
-  return a * 10 + b;
+    int a = 1;
+    int b = 2;
+    do {
+        int t = a;
+        a = b;
+        b = t;
+    } while (b == 1);
+    return a * 10 + b;
 }

examples/c/switch-in-loop.c

@@ -1,18 +1,18 @@
 int main() {
-  int i = 0;
-  int c = 0;
-  while (i < 10) {
-    i++;
-    switch (i) {
-      case (1): {
-        continue;
-        break;
-      }
-      default: {
-        break;
-      }
+    int i = 0;
+    int c = 0;
+    while (i < 10) {
+        i++;
+        switch (i) {
+            case (1): {
+                continue;
+                break;
+            }
+            default: {
+                break;
+            }
+        }
+        c++;
     }
-    c++;
-  }
-  return c;
+    return c;
 }

examples/c/temp2.c

@@ -1,29 +1,33 @@
-struct color { int number; char name; };
+struct color {
+    int number;
+    char name;
+};
 
 int main() {
-  int temp = 0;
-  temp += sizeof(unsigned char);
-  temp += _Alignof(unsigned char);
+    int temp = 0;
+    temp += sizeof(unsigned char);
+    temp += _Alignof(unsigned char);
 
-  struct color c = {1, 2};
-  temp += c.name;
-  struct color *cp = &c;
-  temp += cp->name;
+    struct color c = {1, 2};
+    temp += c.name;
+    struct color* cp = &c;
+    temp += cp->name;
 
-  for(int i = 0, j = 0; i < 10; ++i) {
-    if ( i == 2 && j == 0) break;
-    temp += i;
-  }
-
-  switch(temp) {
-    case 1: {
-      temp = 0;
-      break;
+    for (int i = 0, j = 0; i < 10; ++i) {
+        if (i == 2 && j == 0)
+            break;
+        temp += i;
     }
-    default: {
-      break;
-    }
-  }
 
-  return temp;
+    switch (temp) {
+        case 1: {
+            temp = 0;
+            break;
+        }
+        default: {
+            break;
+        }
+    }
+
+    return temp;
 }

examples/c/typecast.c

@@ -1,5 +1,5 @@
 char temp = 0x00L;
 
-int main(){
+int main() {
     return (temp = 0xEF36L) >= (2L);
 }

examples/c/while_continue_break.c

@@ -1,19 +1,20 @@
-int nonce = 1; // For random input
+int nonce = 1;  // For random input
 
 int foo() {
     int sum = 0;
     int i = 0;
     int continue_num = nonce % 98;
 
-    while(i < 100) {
-        if(i == continue_num) {
+    while (i < 100) {
+        if (i == continue_num) {
             i++;
             continue;
         }
         sum += i;
         i++;
 
-        if(i == continue_num + 2) break;
+        if (i == continue_num + 2)
+            break;
     }
 
     return sum;

examples/ir0/hello_main.ir

@@ -0,0 +1,13 @@
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations:
+
+
+block b0:
+  ret 1:i32
+
+block b1:
+  ret 1:i32
+}

examples/ir1/hello_main.ir

@@ -0,0 +1,10 @@
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations: 
+
+
+block b0:
+  ret 0:i32
+}

examples/ir2/hello_main.ir

@@ -0,0 +1,10 @@
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations:
+
+
+block b0:
+  ret 1:i32
+}

examples/ir3/hello_main.ir

@@ -0,0 +1,10 @@
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations:
+
+
+block b0:
+  ret 1:i32
+}

examples/ir4/hello_main.ir

@@ -0,0 +1,10 @@
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations:
+
+
+block b0:
+  ret 1:i32
+}

examples/opt/hello_main.ir

@@ -0,0 +1,10 @@
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations:
+
+
+block b0:
+  ret 1:i32
+}