#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 */
scalar_t__ isspace(char);
void lstrip(char *s) {
  char *b = s;
  while (isspace(*b)) {
    b++;
  }
  while (*b != '\0') {
    *s = *b;
    s++;
    b++;
  }
}


x86 assembly (clang, -O0):
<lstrip>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
movsbl (%rax),%edi
call   1030 <isspace@plt>
cmp    $0x0,%rax
je     114b <lstrip+0x3b>
mov    -0x10(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x10(%rbp)
jmp    1124 <lstrip+0x14>
jmp    1150 <lstrip+0x40>
mov    -0x10(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x0,%eax
je     1189 <lstrip+0x79>
mov    -0x10(%rbp),%rax
mov    (%rax),%cl
mov    -0x8(%rbp),%rax
mov    %cl,(%rax)
mov    -0x8(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x8(%rbp)
mov    -0x10(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x10(%rbp)
jmp    1150 <lstrip+0x40>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<lstrip>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
mov    %rdi,%rbx
nopw   0x0(%rax,%rax,1)
movsbl (%rbx),%edi
call   1030 <isspace@plt>
add    $0x1,%rbx
test   %rax,%rax
jne    1120 <lstrip+0x10>
mov    -0x1(%rbx),%al
test   %al,%al
je     1150 <lstrip+0x40>
xor    %ecx,%ecx
nopw   0x0(%rax,%rax,1)
mov    %al,(%r14,%rcx,1)
movzbl (%rbx,%rcx,1),%eax
add    $0x1,%rcx
test   %al,%al
jne    1140 <lstrip+0x30>
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
define void @lstrip(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
store i8* %0, i8** %2
%4 = load i8*, i8** %2
store i8* %4, i8** %3
br label %5
5: ; preds = %10, %1
%6 = load i8*, i8** %3
%7 = load i8, i8* %6
%8 = call i64 @isspace(i8 signext %7)
%9 = icmp ne i64 %8, 0
br i1 %9, label %10, label %13
10: ; preds = %5
%11 = load i8*, i8** %3
%12 = getelementptr inbounds i8, i8* %11, i32 1
store i8* %12, i8** %3
br label %5
13: ; preds = %5
br label %14
14: ; preds = %19, %13
%15 = load i8*, i8** %3
%16 = load i8, i8* %15
%17 = sext i8 %16 to i32
%18 = icmp ne i32 %17, 0
br i1 %18, label %19, label %27
19: ; preds = %14
%20 = load i8*, i8** %3
%21 = load i8, i8* %20
%22 = load i8*, i8** %2
store i8 %21, i8* %22
%23 = load i8*, i8** %2
%24 = getelementptr inbounds i8, i8* %23, i32 1
store i8* %24, i8** %2
%25 = load i8*, i8** %3
%26 = getelementptr inbounds i8, i8* %25, i32 1
store i8* %26, i8** %3
br label %14
27: ; preds = %14
ret void
}

LLVM IR (-O2):
define void @lstrip(i8* nocapture %0) {
br label %2
2: ; preds = %2, %1
%3 = phi i8* [ %0, %1 ], [ %7, %2 ]
%4 = load i8, i8* %3
%5 = tail call i64 @isspace(i8 signext %4)
%6 = icmp eq i64 %5, 0
%7 = getelementptr inbounds i8, i8* %3, i64 1
br i1 %6, label %8, label %2
8: ; preds = %2
%9 = load i8, i8* %3
%10 = icmp eq i8 %9, 0
br i1 %10, label %19, label %11
11: ; preds = %8, %11
%12 = phi i8 [ %17, %11 ], [ %9, %8 ]
%13 = phi i8* [ %16, %11 ], [ %3, %8 ]
%14 = phi i8* [ %15, %11 ], [ %0, %8 ]
store i8 %12, i8* %14
%15 = getelementptr inbounds i8, i8* %14, i64 1
%16 = getelementptr inbounds i8, i8* %13, i64 1
%17 = load i8, i8* %16
%18 = icmp eq i8 %17, 0
br i1 %18, label %19, label %11
19: ; preds = %11, %8
ret void
}