#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 strlen(char *);
void strtrim(char *str) {
  int i;
  for (i = strlen(str) - 1; (i >= 0 && str[i] > 0 && str[i] <= 32); i--)
    str[i] = 0;
}


x86 assembly (clang, -O0):
<strtrim>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
sub    $0x1,%eax
mov    %eax,-0xc(%rbp)
xor    %eax,%eax
cmpl   $0x0,-0xc(%rbp)
mov    %al,-0xd(%rbp)
jl     1169 <strtrim+0x59>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%ecx
xor    %eax,%eax
cmp    $0x0,%ecx
mov    %al,-0xd(%rbp)
jle    1169 <strtrim+0x59>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x20,%eax
setle  %al
mov    %al,-0xd(%rbp)
mov    -0xd(%rbp),%al
test   $0x1,%al
jne    1179 <strtrim+0x69>
jmp    1193 <strtrim+0x83>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
jmp    112b <strtrim+0x1b>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<strtrim>:
push   %rbx
mov    %rdi,%rbx
call   1030 <strlen@plt>
test   %eax,%eax
jle    114d <strtrim+0x3d>
mov    %eax,%eax
add    $0x1,%rax
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
lea    -0x2(%rax),%ecx
movzbl (%rbx,%rcx,1),%edx
add    $0xff,%dl
cmp    $0x1f,%dl
ja     114d <strtrim+0x3d>
movb   $0x0,(%rbx,%rcx,1)
add    $0xffffffffffffffff,%rax
cmp    $0x1,%rax
ja     1130 <strtrim+0x20>
pop    %rbx
ret

LLVM IR (-O0):
define void @strtrim(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i32 @strlen(i8* %4)
%6 = sub nsw i32 %5, 1
store i32 %6, i32* %3
br label %7
7: ; preds = %33, %1
%8 = load i32, i32* %3
%9 = icmp sge i32 %8, 0
br i1 %9, label %10, label %26
10: ; preds = %7
%11 = load i8*, i8** %2
%12 = load i32, i32* %3
%13 = sext i32 %12 to i64
%14 = getelementptr inbounds i8, i8* %11, i64 %13
%15 = load i8, i8* %14
%16 = sext i8 %15 to i32
%17 = icmp sgt i32 %16, 0
br i1 %17, label %18, label %26
18: ; preds = %10
%19 = load i8*, i8** %2
%20 = load i32, i32* %3
%21 = sext i32 %20 to i64
%22 = getelementptr inbounds i8, i8* %19, i64 %21
%23 = load i8, i8* %22
%24 = sext i8 %23 to i32
%25 = icmp sle i32 %24, 32
br label %26
26: ; preds = %18, %10, %7
%27 = phi i1 [ false, %10 ], [ false, %7 ], [ %25, %18 ]
br i1 %27, label %28, label %36
28: ; preds = %26
%29 = load i8*, i8** %2
%30 = load i32, i32* %3
%31 = sext i32 %30 to i64
%32 = getelementptr inbounds i8, i8* %29, i64 %31
store i8 0, i8* %32
br label %33
33: ; preds = %28
%34 = load i32, i32* %3
%35 = add nsw i32 %34, -1
store i32 %35, i32* %3
br label %7
36: ; preds = %26
ret void
}

LLVM IR (-O2):
define void @strtrim(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp sgt i32 %2, 0
br i1 %3, label %4, label %16
4: ; preds = %1
%5 = zext i32 %2 to i64
br label %6
6: ; preds = %4, %14
%7 = phi i64 [ %5, %4 ], [ %8, %14 ]
%8 = add nsw i64 %7, -1
%9 = and i64 %8, 4294967295
%10 = getelementptr inbounds i8, i8* %0, i64 %9
%11 = load i8, i8* %10
%12 = add i8 %11, -1
%13 = icmp ult i8 %12, 32
br i1 %13, label %14, label %16
14: ; preds = %6
store i8 0, i8* %10
%15 = icmp ugt i64 %7, 1
br i1 %15, label %6, label %16
16: ; preds = %6, %14, %1
ret void
}