#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__ tolower(char const);
int stricmp(const char *s1, const char *s2) {
  ;
  for (; tolower(*s1) == tolower(*s2); s1++, s2++)
    if (!*s1) {
      ;
      return 0;
    };
  return (*(unsigned char *)s1 < *(unsigned char *)s2) ? -1 : 1;
}


x86 assembly (clang, -O0):
<stricmp>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rax
movsbl (%rax),%edi
call   1030 <tolower@plt>
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rax
movsbl (%rax),%edi
call   1030 <tolower@plt>
mov    %rax,%rcx
mov    -0x20(%rbp),%rax
cmp    %rcx,%rax
jne    1187 <stricmp+0x77>
mov    -0x10(%rbp),%rax
cmpb   $0x0,(%rax)
jne    1165 <stricmp+0x55>
movl   $0x0,-0x4(%rbp)
jmp    11a7 <stricmp+0x97>
jmp    116a <stricmp+0x5a>
mov    -0x10(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x10(%rbp)
mov    -0x18(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x18(%rbp)
jmp    1120 <stricmp+0x10>
mov    -0x10(%rbp),%rax
movzbl (%rax),%edx
mov    -0x18(%rbp),%rax
movzbl (%rax),%esi
mov    $0x1,%eax
mov    $0xffffffff,%ecx
cmp    %esi,%edx
cmovl  %ecx,%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<stricmp>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%rbx
movsbl (%rdi),%edi
call   1030 <tolower@plt>
mov    %rax,%r15
movsbl (%r14),%edi
call   1030 <tolower@plt>
cmp    %rax,%r15
jne    116d <stricmp+0x5d>
nopw   0x0(%rax,%rax,1)
cmpb   $0x0,(%rbx)
je     1183 <stricmp+0x73>
lea    0x1(%r14),%r12
movsbl 0x1(%rbx),%edi
add    $0x1,%rbx
call   1030 <tolower@plt>
mov    %rax,%r15
movsbl 0x1(%r14),%edi
call   1030 <tolower@plt>
mov    %r12,%r14
cmp    %rax,%r15
je     1140 <stricmp+0x30>
jmp    1170 <stricmp+0x60>
mov    %r14,%r12
mov    (%rbx),%al
xor    %ecx,%ecx
cmp    (%r12),%al
setae  %cl
lea    (%rcx,%rcx,1),%eax
add    $0xffffffff,%eax
jmp    1185 <stricmp+0x75>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

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

LLVM IR (-O2):
define i32 @stricmp(i8* nocapture %0, i8* nocapture %1) {
%3 = load i8, i8* %0
%4 = tail call i64 @tolower(i8 signext %3)
%5 = load i8, i8* %1
%6 = tail call i64 @tolower(i8 signext %5)
%7 = icmp eq i64 %4, %6
br i1 %7, label %8, label %21
8: ; preds = %2, %13
%9 = phi i8* [ %15, %13 ], [ %1, %2 ]
%10 = phi i8* [ %14, %13 ], [ %0, %2 ]
%11 = load i8, i8* %10
%12 = icmp eq i8 %11, 0
br i1 %12, label %28, label %13
13: ; preds = %8
%14 = getelementptr inbounds i8, i8* %10, i64 1
%15 = getelementptr inbounds i8, i8* %9, i64 1
%16 = load i8, i8* %14
%17 = tail call i64 @tolower(i8 signext %16)
%18 = load i8, i8* %15
%19 = tail call i64 @tolower(i8 signext %18)
%20 = icmp eq i64 %17, %19
br i1 %20, label %8, label %21
21: ; preds = %13, %2
%22 = phi i8* [ %0, %2 ], [ %14, %13 ]
%23 = phi i8* [ %1, %2 ], [ %15, %13 ]
%24 = load i8, i8* %22
%25 = load i8, i8* %23
%26 = icmp ult i8 %24, %25
%27 = select i1 %26, i32 -1, i32 1
br label %28
28: ; preds = %8, %21
%29 = phi i32 [ %27, %21 ], [ 0, %8 ]
ret i32 %29
}