#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(int argc, char *argv[]) {
  while (argc-- > 1) {
    printf("* argv = '%s';\n", *++argv);
    printf("* ( ++ * argv ) = '%c';\n", *(++*argv));
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,%ecx
add    $0xffffffff,%ecx
mov    %ecx,-0x8(%rbp)
cmp    $0x1,%eax
jle    1183 <main+0x73>
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x8,%rcx
mov    %rcx,-0x10(%rbp)
mov    0x8(%rax),%rsi
lea    0xeac(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%rcx
mov    (%rcx),%rax
mov    %rax,%rdx
add    $0x1,%rdx
mov    %rdx,(%rcx)
movsbl 0x1(%rax),%esi
lea    0xe99(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1126 <main+0x16>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
cmp    $0x2,%edi
jl     1171 <main+0x61>
mov    %rsi,%rbx
mov    %edi,%ebp
add    $0x8,%rbx
add    $0x1,%ebp
lea    0xed1(%rip),%r14
lea    0xeda(%rip),%r15
cs nopw 0x0(%rax,%rax,1)
mov    (%rbx),%rsi
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    (%rbx),%rax
lea    0x1(%rax),%rcx
mov    %rcx,(%rbx)
movsbl 0x1(%rax),%esi
mov    %r15,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
add    $0x8,%rbx
add    $0xffffffff,%ebp
cmp    $0x2,%ebp
ja     1140 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [16 x i8] c"* argv = '%s';\0A\00"
@.str.1 = [25 x i8] c"* ( ++ * argv ) = '%c';\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
br label %6
6: ; preds = %10, %2
%7 = load i32, i32* %4
%8 = add nsw i32 %7, -1
store i32 %8, i32* %4
%9 = icmp sgt i32 %7, 1
br i1 %9, label %10, label %21
10: ; preds = %6
%11 = load i8**, i8*** %5
%12 = getelementptr inbounds i8*, i8** %11, i32 1
store i8** %12, i8*** %5
%13 = load i8*, i8** %12
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %13)
%15 = load i8**, i8*** %5
%16 = load i8*, i8** %15
%17 = getelementptr inbounds i8, i8* %16, i32 1
store i8* %17, i8** %15
%18 = load i8, i8* %17
%19 = sext i8 %18 to i32
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i32 %19)
br label %6
21: ; preds = %6
%22 = load i32, i32* %3
ret i32 %22
}

LLVM IR (-O2):
@.str = [16 x i8] c"* argv = '%s';\0A\00"
@.str.1 = [25 x i8] c"* ( ++ * argv ) = '%c';\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp sgt i32 %0, 1
br i1 %3, label %4, label %17
4: ; preds = %2, %4
%5 = phi i8** [ %8, %4 ], [ %1, %2 ]
%6 = phi i32 [ %7, %4 ], [ %0, %2 ]
%7 = add nsw i32 %6, -1
%8 = getelementptr inbounds i8*, i8** %5, i64 1
%9 = load i8*, i8** %8
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %9)
%11 = load i8*, i8** %8
%12 = getelementptr inbounds i8, i8* %11, i64 1
store i8* %12, i8** %8
%13 = load i8, i8* %12
%14 = sext i8 %13 to i32
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i32 %14)
%16 = icmp ugt i32 %6, 2
br i1 %16, label %4, label %17
17: ; preds = %4, %2
ret i32 0
}