main() {
  return (int){1} + (int){(int[]){1, 2, 3}[1]} +
         (int[]){(int){1}, (int){3}, (int[][2]){1, 2, 3, 4}[0][1]}[2] +
         (int){({ 5 + 3; })} + ({
           (int[]){(int){5}, (int){(int[]){7}[0]}}[1];
         });
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x8(%rbp)
mov    -0x8(%rbp),%eax
movl   $0x1,-0x18(%rbp)
movl   $0x2,-0x14(%rbp)
movl   $0x3,-0x10(%rbp)
mov    -0x14(%rbp),%ecx
mov    %ecx,-0xc(%rbp)
add    -0xc(%rbp),%eax
movl   $0x1,-0x28(%rbp)
mov    -0x28(%rbp),%ecx
mov    %ecx,-0x24(%rbp)
movl   $0x3,-0x2c(%rbp)
mov    -0x2c(%rbp),%ecx
mov    %ecx,-0x20(%rbp)
movl   $0x1,-0x3c(%rbp)
movl   $0x2,-0x38(%rbp)
movl   $0x3,-0x34(%rbp)
movl   $0x4,-0x30(%rbp)
mov    -0x38(%rbp),%ecx
mov    %ecx,-0x1c(%rbp)
add    -0x1c(%rbp),%eax
movl   $0x8,-0x44(%rbp)
mov    -0x44(%rbp),%ecx
mov    %ecx,-0x40(%rbp)
add    -0x40(%rbp),%eax
movl   $0x5,-0x54(%rbp)
mov    -0x54(%rbp),%ecx
mov    %ecx,-0x50(%rbp)
movl   $0x7,-0x5c(%rbp)
mov    -0x5c(%rbp),%ecx
mov    %ecx,-0x58(%rbp)
mov    -0x58(%rbp),%ecx
mov    %ecx,-0x4c(%rbp)
mov    -0x4c(%rbp),%ecx
mov    %ecx,-0x48(%rbp)
add    -0x48(%rbp),%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
mov    $0x14,%eax
ret

LLVM IR (-O0):
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca [3 x i32]
%5 = alloca [3 x i32]
%6 = alloca i32
%7 = alloca i32
%8 = alloca [2 x [2 x i32]]
%9 = alloca i32
%10 = alloca i32
%11 = alloca i32
%12 = alloca [2 x i32]
%13 = alloca i32
%14 = alloca i32
%15 = alloca [1 x i32]
store i32 0, i32* %1
store i32 1, i32* %2
%16 = load i32, i32* %2
%17 = getelementptr inbounds [3 x i32], [3 x i32]* %4, i64 0, i64 0
store i32 1, i32* %17
%18 = getelementptr inbounds i32, i32* %17, i64 1
store i32 2, i32* %18
%19 = getelementptr inbounds i32, i32* %18, i64 1
store i32 3, i32* %19
%20 = getelementptr inbounds [3 x i32], [3 x i32]* %4, i64 0, i64 1
%21 = load i32, i32* %20
store i32 %21, i32* %3
%22 = load i32, i32* %3
%23 = add nsw i32 %16, %22
%24 = getelementptr inbounds [3 x i32], [3 x i32]* %5, i64 0, i64 0
store i32 1, i32* %6
%25 = load i32, i32* %6
store i32 %25, i32* %24
%26 = getelementptr inbounds i32, i32* %24, i64 1
store i32 3, i32* %7
%27 = load i32, i32* %7
store i32 %27, i32* %26
%28 = getelementptr inbounds i32, i32* %26, i64 1
%29 = getelementptr inbounds [2 x [2 x i32]], [2 x [2 x i32]]* %8, i64 0, i64 0
%30 = getelementptr inbounds [2 x i32], [2 x i32]* %29, i64 0, i64 0
store i32 1, i32* %30
%31 = getelementptr inbounds i32, i32* %30, i64 1
store i32 2, i32* %31
%32 = getelementptr inbounds [2 x i32], [2 x i32]* %29, i64 1
%33 = getelementptr inbounds [2 x i32], [2 x i32]* %32, i64 0, i64 0
store i32 3, i32* %33
%34 = getelementptr inbounds i32, i32* %33, i64 1
store i32 4, i32* %34
%35 = getelementptr inbounds [2 x [2 x i32]], [2 x [2 x i32]]* %8, i64 0, i64 0
%36 = getelementptr inbounds [2 x i32], [2 x i32]* %35, i64 0, i64 1
%37 = load i32, i32* %36
store i32 %37, i32* %28
%38 = getelementptr inbounds [3 x i32], [3 x i32]* %5, i64 0, i64 2
%39 = load i32, i32* %38
%40 = add nsw i32 %23, %39
store i32 8, i32* %10
%41 = load i32, i32* %10
store i32 %41, i32* %9
%42 = load i32, i32* %9
%43 = add nsw i32 %40, %42
%44 = getelementptr inbounds [2 x i32], [2 x i32]* %12, i64 0, i64 0
store i32 5, i32* %13
%45 = load i32, i32* %13
store i32 %45, i32* %44
%46 = getelementptr inbounds i32, i32* %44, i64 1
%47 = getelementptr inbounds [1 x i32], [1 x i32]* %15, i64 0, i64 0
store i32 7, i32* %47
%48 = getelementptr inbounds [1 x i32], [1 x i32]* %15, i64 0, i64 0
%49 = load i32, i32* %48
store i32 %49, i32* %14
%50 = load i32, i32* %14
store i32 %50, i32* %46
%51 = getelementptr inbounds [2 x i32], [2 x i32]* %12, i64 0, i64 1
%52 = load i32, i32* %51
store i32 %52, i32* %11
%53 = load i32, i32* %11
%54 = add nsw i32 %43, %53
ret i32 %54
}

LLVM IR (-O2):
define i32 @main() {
ret i32 20
}