#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);
int strrindex(char *, char *);
int main() {
  char *source = "hello world and world hello";
  char *search1 = "world";
  char *search2 = "word";
  printf("%d\n", strrindex(source, search1));
  printf("%d\n", strrindex(source, search2));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
lea    0xed1(%rip),%rax
mov    %rax,-0x8(%rbp)
lea    0xee2(%rip),%rax
mov    %rax,-0x10(%rbp)
lea    0xedd(%rip),%rax
mov    %rax,-0x18(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1040 <strrindex@plt>
mov    %eax,%esi
lea    0xec8(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%rdi
mov    -0x18(%rbp),%rsi
call   1040 <strrindex@plt>
mov    %eax,%esi
lea    0xead(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xed5(%rip),%r14
lea    0xeea(%rip),%rsi
mov    %r14,%rdi
call   1040 <strrindex@plt>
lea    0xee6(%rip),%rbx
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xed0(%rip),%rsi
mov    %r14,%rdi
call   1040 <strrindex@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [28 x i8] c"hello world and world hello\00"
@.str.1 = [6 x i8] c"world\00"
@.str.2 = [5 x i8] c"word\00"
@.str.3 = [4 x i8] c"%d\0A\00"
define i32 @main() {
%1 = alloca i8*
%2 = alloca i8*
%3 = alloca i8*
store i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i8** %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i8** %2
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8** %3
%4 = load i8*, i8** %1
%5 = load i8*, i8** %2
%6 = call i32 @strrindex(i8* %4, i8* %5)
%7 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %6)
%8 = load i8*, i8** %1
%9 = load i8*, i8** %3
%10 = call i32 @strrindex(i8* %8, i8* %9)
%11 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %10)
ret i32 0
}

LLVM IR (-O2):
@.str = [28 x i8] c"hello world and world hello\00"
@.str.1 = [6 x i8] c"world\00"
@.str.2 = [5 x i8] c"word\00"
@.str.3 = [4 x i8] c"%d\0A\00"
define i32 @main() {
%1 = tail call i32 @strrindex(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0))
%2 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %1)
%3 = tail call i32 @strrindex(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%4 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 %3)
ret i32 0
}