#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);
int strlen(char *);
char *tokenise_by_commas_and_whitespace(char *list) {
  int i, length;
  for (i = 0, length = strlen(list); i < length; i++) {
    if (isspace(list[i]) || list[i] == ',') {
      list[i] = '\0';
    }
  }
  return list;
}


x86 assembly (clang, -O0):
<tokenise_by_commas_and_whitespace>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x10(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    119a <tokenise_by_commas_and_whitespace+0x7a>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%edi
call   1040 <isspace@plt>
cmp    $0x0,%rax
jne    117b <tokenise_by_commas_and_whitespace+0x5b>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x2c,%eax
jne    1187 <tokenise_by_commas_and_whitespace+0x67>
mov    -0x8(%rbp),%rax
movslq -0xc(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
jmp    118c <tokenise_by_commas_and_whitespace+0x6c>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    113f <tokenise_by_commas_and_whitespace+0x1f>
mov    -0x8(%rbp),%rax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<tokenise_by_commas_and_whitespace>:
push   %r15
push   %r14
push   %rbx
mov    %rdi,%r15
call   1030 <strlen@plt>
test   %eax,%eax
jle    1166 <tokenise_by_commas_and_whitespace+0x46>
mov    %eax,%r14d
xor    %ebx,%ebx
jmp    114e <tokenise_by_commas_and_whitespace+0x2e>
nopl   0x0(%rax,%rax,1)
movb   $0x0,(%r15,%rbx,1)
add    $0x1,%rbx
cmp    %rbx,%r14
je     1166 <tokenise_by_commas_and_whitespace+0x46>
movsbl (%r15,%rbx,1),%edi
call   1040 <isspace@plt>
test   %rax,%rax
jne    1140 <tokenise_by_commas_and_whitespace+0x20>
cmpb   $0x2c,(%r15,%rbx,1)
je     1140 <tokenise_by_commas_and_whitespace+0x20>
jmp    1145 <tokenise_by_commas_and_whitespace+0x25>
mov    %r15,%rax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i8* @tokenise_by_commas_and_whitespace(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
%4 = alloca i32
store i8* %0, i8** %2
store i32 0, i32* %3
%5 = load i8*, i8** %2
%6 = call i32 @strlen(i8* %5)
store i32 %6, i32* %4
br label %7
7: ; preds = %33, %1
%8 = load i32, i32* %3
%9 = load i32, i32* %4
%10 = icmp slt i32 %8, %9
br i1 %10, label %11, label %36
11: ; preds = %7
%12 = load i8*, i8** %2
%13 = load i32, i32* %3
%14 = sext i32 %13 to i64
%15 = getelementptr inbounds i8, i8* %12, i64 %14
%16 = load i8, i8* %15
%17 = call i64 @isspace(i8 signext %16)
%18 = icmp ne i64 %17, 0
br i1 %18, label %27, label %19
19: ; preds = %11
%20 = load i8*, i8** %2
%21 = load i32, i32* %3
%22 = sext i32 %21 to i64
%23 = getelementptr inbounds i8, i8* %20, i64 %22
%24 = load i8, i8* %23
%25 = sext i8 %24 to i32
%26 = icmp eq i32 %25, 44
br i1 %26, label %27, label %32
27: ; preds = %19, %11
%28 = load i8*, i8** %2
%29 = load i32, i32* %3
%30 = sext i32 %29 to i64
%31 = getelementptr inbounds i8, i8* %28, i64 %30
store i8 0, i8* %31
br label %32
32: ; preds = %27, %19
br label %33
33: ; preds = %32
%34 = load i32, i32* %3
%35 = add nsw i32 %34, 1
store i32 %35, i32* %3
br label %7
36: ; preds = %7
%37 = load i8*, i8** %2
ret i8* %37
}

LLVM IR (-O2):
define i8* @tokenise_by_commas_and_whitespace(i8* returned %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp sgt i32 %2, 0
br i1 %3, label %4, label %19
4: ; preds = %1
%5 = zext i32 %2 to i64
br label %6
6: ; preds = %4, %16
%7 = phi i64 [ 0, %4 ], [ %17, %16 ]
%8 = getelementptr inbounds i8, i8* %0, i64 %7
%9 = load i8, i8* %8
%10 = tail call i64 @isspace(i8 signext %9)
%11 = icmp eq i64 %10, 0
br i1 %11, label %12, label %15
12: ; preds = %6
%13 = load i8, i8* %8
%14 = icmp eq i8 %13, 44
br i1 %14, label %15, label %16
15: ; preds = %12, %6
store i8 0, i8* %8
br label %16
16: ; preds = %12, %15
%17 = add nuw nsw i64 %7, 1
%18 = icmp eq i64 %17, %5
br i1 %18, label %19, label %6
19: ; preds = %16, %1
ret i8* %0
}