#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  int b[] = {10, 20, 30, 40};
  int *b_ptr = b;
  int c;
  int offset;
  printf("Array sudirript notation:\n");
  for (c = 0; c < 4; c++) {
    printf("b[%d] == %d\n", c, b[c]);
  }
  printf("\nPointer/offset notation:\n");
  for (offset = 0; offset < 4; offset++) {
    printf("*(b + %d) == %d\n", offset, *(b + offset));
  }
  printf("\nPointer sudirript notation:\n");
  for (c = 0; c < 4; c++) {
    printf("b_ptr[%d] == %d\n", c, b_ptr[c]);
  }
  printf("\nPointer/offset notation:\n");
  for (offset = 0; offset < 4; offset++) {
    printf("*(b_ptr + %d) == %d\n", offset, *(b_ptr + offset));
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    0xeda(%rip),%rax
mov    %rax,-0x20(%rbp)
mov    0xed7(%rip),%rax
mov    %rax,-0x18(%rbp)
lea    -0x20(%rbp),%rax
mov    %rax,-0x28(%rbp)
lea    0xecc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x2c(%rbp)
cmpl   $0x4,-0x2c(%rbp)
jge    1183 <main+0x73>
mov    -0x2c(%rbp),%esi
movslq -0x2c(%rbp),%rax
mov    -0x20(%rbp,%rax,4),%edx
lea    0xebd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x2c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x2c(%rbp)
jmp    1152 <main+0x42>
lea    0xeae(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x30(%rbp)
cmpl   $0x4,-0x30(%rbp)
jge    11c9 <main+0xb9>
mov    -0x30(%rbp),%esi
movslq -0x30(%rbp),%rax
mov    -0x20(%rbp,%rax,4),%edx
lea    0xe9f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x30(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x30(%rbp)
jmp    1198 <main+0x88>
lea    0xe94(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x2c(%rbp)
cmpl   $0x4,-0x2c(%rbp)
jge    1212 <main+0x102>
mov    -0x2c(%rbp),%esi
mov    -0x28(%rbp),%rax
movslq -0x2c(%rbp),%rcx
mov    (%rax,%rcx,4),%edx
lea    0xe85(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x2c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x2c(%rbp)
jmp    11de <main+0xce>
lea    0xe1f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x30(%rbp)
cmpl   $0x4,-0x30(%rbp)
jge    125b <main+0x14b>
mov    -0x30(%rbp),%esi
mov    -0x28(%rbp),%rax
movslq -0x30(%rbp),%rcx
mov    (%rax,%rcx,4),%edx
lea    0xe4d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x30(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x30(%rbp)
jmp    1227 <main+0x117>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xf19(%rip),%rdi
call   1030 <puts@plt>
lea    0xec9(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0xa,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x14,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    $0x1e,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    $0x28,%edx
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xef0(%rip),%r14
mov    %r14,%rdi
call   1030 <puts@plt>
lea    0xe73(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0xa,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x14,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    $0x1e,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    $0x28,%edx
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe70(%rip),%rdi
call   1030 <puts@plt>
lea    0xe24(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0xa,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x14,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    $0x1e,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    $0x28,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %r14,%rdi
call   1030 <puts@plt>
lea    0xdd9(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0xa,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x14,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    $0x1e,%edx
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    $0x28,%edx
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@__const.main.b = [4 x i32] [i32 10, i32 20, i32 30, i32 40]
@.str = [27 x i8] c"Array sudirript notation:\0A\00"
@.str.1 = [13 x i8] c"b[%d] == %d\0A\00"
@.str.2 = [27 x i8] c"\0APointer/offset notation:\0A\00"
@.str.3 = [17 x i8] c"*(b + %d) == %d\0A\00"
@.str.4 = [30 x i8] c"\0APointer sudirript notation:\0A\00"
@.str.5 = [17 x i8] c"b_ptr[%d] == %d\0A\00"
@.str.6 = [21 x i8] c"*(b_ptr + %d) == %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [4 x i32]
%3 = alloca i32*
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = bitcast [4 x i32]* %2 to i8*
%7 = getelementptr inbounds [4 x i32], [4 x i32]* %2, i64 0, i64 0
store i32* %7, i32** %3
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %4
br label %9
9: ; preds = %19, %0
%10 = load i32, i32* %4
%11 = icmp slt i32 %10, 4
br i1 %11, label %12, label %22
12: ; preds = %9
%13 = load i32, i32* %4
%14 = load i32, i32* %4
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds [4 x i32], [4 x i32]* %2, i64 0, i64 %15
%17 = load i32, i32* %16
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 %13, i32 %17)
br label %19
19: ; preds = %12
%20 = load i32, i32* %4
%21 = add nsw i32 %20, 1
store i32 %21, i32* %4
br label %9
22: ; preds = %9
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %5
br label %24
24: ; preds = %35, %22
%25 = load i32, i32* %5
%26 = icmp slt i32 %25, 4
br i1 %26, label %27, label %38
27: ; preds = %24
%28 = load i32, i32* %5
%29 = getelementptr inbounds [4 x i32], [4 x i32]* %2, i64 0, i64 0
%30 = load i32, i32* %5
%31 = sext i32 %30 to i64
%32 = getelementptr inbounds i32, i32* %29, i64 %31
%33 = load i32, i32* %32
%34 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 %28, i32 %33)
br label %35
35: ; preds = %27
%36 = load i32, i32* %5
%37 = add nsw i32 %36, 1
store i32 %37, i32* %5
br label %24
38: ; preds = %24
%39 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.4, i64 0, i64 0))
store i32 0, i32* %4
br label %40
40: ; preds = %51, %38
%41 = load i32, i32* %4
%42 = icmp slt i32 %41, 4
br i1 %42, label %43, label %54
43: ; preds = %40
%44 = load i32, i32* %4
%45 = load i32*, i32** %3
%46 = load i32, i32* %4
%47 = sext i32 %46 to i64
%48 = getelementptr inbounds i32, i32* %45, i64 %47
%49 = load i32, i32* %48
%50 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.5, i64 0, i64 0), i32 %44, i32 %49)
br label %51
51: ; preds = %43
%52 = load i32, i32* %4
%53 = add nsw i32 %52, 1
store i32 %53, i32* %4
br label %40
54: ; preds = %40
%55 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %5
br label %56
56: ; preds = %67, %54
%57 = load i32, i32* %5
%58 = icmp slt i32 %57, 4
br i1 %58, label %59, label %70
59: ; preds = %56
%60 = load i32, i32* %5
%61 = load i32*, i32** %3
%62 = load i32, i32* %5
%63 = sext i32 %62 to i64
%64 = getelementptr inbounds i32, i32* %61, i64 %63
%65 = load i32, i32* %64
%66 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.6, i64 0, i64 0), i32 %60, i32 %65)
br label %67
67: ; preds = %59
%68 = load i32, i32* %5
%69 = add nsw i32 %68, 1
store i32 %69, i32* %5
br label %56
70: ; preds = %56
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [13 x i8] c"b[%d] == %d\0A\00"
@.str.3 = [17 x i8] c"*(b + %d) == %d\0A\00"
@.str.5 = [17 x i8] c"b_ptr[%d] == %d\0A\00"
@.str.6 = [21 x i8] c"*(b_ptr + %d) == %d\0A\00"
@str = [26 x i8] c"Array sudirript notation:\00"
@str.8 = [29 x i8] c"\0APointer sudirript notation:\00"
@str.9 = [26 x i8] c"\0APointer/offset notation:\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 0, i32 10)
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 1, i32 20)
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 2, i32 30)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 3, i32 40)
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.9, i64 0, i64 0))
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 0, i32 10)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 1, i32 20)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 2, i32 30)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 3, i32 40)
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @str.8, i64 0, i64 0))
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.5, i64 0, i64 0), i32 0, i32 10)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.5, i64 0, i64 0), i32 1, i32 20)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.5, i64 0, i64 0), i32 2, i32 30)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.5, i64 0, i64 0), i32 3, i32 40)
%16 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.9, i64 0, i64 0))
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.6, i64 0, i64 0), i32 0, i32 10)
%18 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.6, i64 0, i64 0), i32 1, i32 20)
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.6, i64 0, i64 0), i32 2, i32 30)
%20 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.6, i64 0, i64 0), i32 3, i32 40)
ret i32 0
}