#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, char *);
int main(int argc, char *argv[]) {
  int i;
  extern char **environ;
  for (i = 0; i < argc; i++) {
    printf("argv[%d]: %s\n", i, argv[i]);
  }
  for (i = 0; environ[i] != NULL; i++) {
    printf("environ[%d]: %s\n", i, *(environ + i));
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1162 <main+0x52>
mov    -0x14(%rbp),%esi
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdx
lea    0xeb1(%rip),%rdi
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    112d <main+0x1d>
movl   $0x0,-0x14(%rbp)
mov    0x2e78(%rip),%rax
mov    (%rax),%rax
movslq -0x14(%rbp),%rcx
cmpq   $0x0,(%rax,%rcx,8)
je     11b1 <main+0xa1>
mov    -0x14(%rbp),%esi
mov    0x2e5c(%rip),%rax
mov    (%rax),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdx
lea    0xe70(%rip),%rdi
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1169 <main+0x59>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
test   %edi,%edi
jle    1147 <main+0x37>
mov    %rsi,%r14
mov    %edi,%r12d
xor    %ebx,%ebx
lea    0xed5(%rip),%r15
nopl   0x0(%rax,%rax,1)
mov    (%r14,%rbx,8),%rdx
mov    %r15,%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%r12
jne    1130 <main+0x20>
mov    0x2e9a(%rip),%r15
mov    (%r15),%rax
mov    (%rax),%rdx
test   %rdx,%rdx
je     118b <main+0x7b>
xor    %ebx,%ebx
lea    0xeac(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    %r14,%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
mov    (%r15),%rax
mov    0x8(%rax,%rbx,8),%rdx
add    $0x1,%rbx
test   %rdx,%rdx
jne    1170 <main+0x60>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [14 x i8] c"argv[%d]: %s\0A\00"
@environ = external global i8**
@.str.1 = [17 x i8] c"environ[%d]: %s\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 0, i32* %6
br label %7
7: ; preds = %19, %2
%8 = load i32, i32* %6
%9 = load i32, i32* %4
%10 = icmp slt i32 %8, %9
br i1 %10, label %11, label %22
11: ; preds = %7
%12 = load i32, i32* %6
%13 = load i8**, i8*** %5
%14 = load i32, i32* %6
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds i8*, i8** %13, i64 %15
%17 = load i8*, i8** %16
%18 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 %12, i8* %17)
br label %19
19: ; preds = %11
%20 = load i32, i32* %6
%21 = add nsw i32 %20, 1
store i32 %21, i32* %6
br label %7
22: ; preds = %7
store i32 0, i32* %6
br label %23
23: ; preds = %38, %22
%24 = load i8**, i8*** @environ
%25 = load i32, i32* %6
%26 = sext i32 %25 to i64
%27 = getelementptr inbounds i8*, i8** %24, i64 %26
%28 = load i8*, i8** %27
%29 = icmp ne i8* %28, null
br i1 %29, label %30, label %41
30: ; preds = %23
%31 = load i32, i32* %6
%32 = load i8**, i8*** @environ
%33 = load i32, i32* %6
%34 = sext i32 %33 to i64
%35 = getelementptr inbounds i8*, i8** %32, i64 %34
%36 = load i8*, i8** %35
%37 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %31, i8* %36)
br label %38
38: ; preds = %30
%39 = load i32, i32* %6
%40 = add nsw i32 %39, 1
store i32 %40, i32* %6
br label %23
41: ; preds = %23
ret i32 0
}

LLVM IR (-O2):
@.str = [14 x i8] c"argv[%d]: %s\0A\00"
@environ = external global i8**
@.str.1 = [17 x i8] c"environ[%d]: %s\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp sgt i32 %0, 0
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = zext i32 %0 to i64
br label %10
6: ; preds = %10, %2
%7 = load i8**, i8*** @environ
%8 = load i8*, i8** %7
%9 = icmp eq i8* %8, null
br i1 %9, label %28, label %18
10: ; preds = %4, %10
%11 = phi i64 [ 0, %4 ], [ %16, %10 ]
%12 = getelementptr inbounds i8*, i8** %1, i64 %11
%13 = load i8*, i8** %12
%14 = trunc i64 %11 to i32
%15 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i32 %14, i8* %13)
%16 = add nuw nsw i64 %11, 1
%17 = icmp eq i64 %16, %5
br i1 %17, label %6, label %10
18: ; preds = %6, %18
%19 = phi i64 [ %23, %18 ], [ 0, %6 ]
%20 = phi i8* [ %26, %18 ], [ %8, %6 ]
%21 = trunc i64 %19 to i32
%22 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %21, i8* %20)
%23 = add nuw i64 %19, 1
%24 = load i8**, i8*** @environ
%25 = getelementptr inbounds i8*, i8** %24, i64 %23
%26 = load i8*, i8** %25
%27 = icmp eq i8* %26, null
br i1 %27, label %28, label %18
28: ; preds = %18, %6
ret i32 0
}