#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 *);
int get_hash(char *string) {
  int i, hash = 7;
  for (i = 0; i < strlen(string); i++) {
    hash = hash * 31 + string[i];
  }
  return hash % 10000;
}


x86 assembly (clang, -O0):
<get_hash>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
movl   $0x7,-0x10(%rbp)
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,%ecx
mov    -0x14(%rbp),%eax
cmp    %ecx,%eax
jge    1169 <get_hash+0x59>
imul   $0x1f,-0x10(%rbp),%eax
mov    -0x8(%rbp),%rcx
movslq -0xc(%rbp),%rdx
movsbl (%rcx,%rdx,1),%ecx
add    %ecx,%eax
mov    %eax,-0x10(%rbp)
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    112a <get_hash+0x1a>
mov    -0x10(%rbp),%eax
mov    $0x2710,%ecx
cltd
idiv   %ecx
mov    %edx,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_hash>:
push   %rbp
push   %r14
push   %rbx
mov    %rdi,%r14
call   1030 <strlen@plt>
test   %eax,%eax
jle    1172 <get_hash+0x62>
mov    $0x7,%ebp
xor    %ebx,%ebx
nopw   0x0(%rax,%rax,1)
mov    %ebp,%eax
shl    $0x5,%eax
sub    %ebp,%eax
movsbl (%r14,%rbx,1),%ebp
add    %eax,%ebp
add    $0x1,%rbx
mov    %r14,%rdi
call   1030 <strlen@plt>
cltq
cmp    %rax,%rbx
jl     1130 <get_hash+0x20>
movslq %ebp,%rax
imul   $0x68db8bad,%rax,%rcx
mov    %rcx,%rdx
shr    $0x3f,%rdx
sar    $0x2c,%rcx
add    %edx,%ecx
imul   $0x2710,%ecx,%ecx
sub    %ecx,%eax
jmp    1177 <get_hash+0x67>
mov    $0x7,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
define i32 @get_hash(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
%4 = alloca i32
store i8* %0, i8** %2
store i32 7, i32* %4
store i32 0, i32* %3
br label %5
5: ; preds = %20, %1
%6 = load i32, i32* %3
%7 = load i8*, i8** %2
%8 = call i32 @strlen(i8* %7)
%9 = icmp slt i32 %6, %8
br i1 %9, label %10, label %23
10: ; preds = %5
%11 = load i32, i32* %4
%12 = mul nsw i32 %11, 31
%13 = load i8*, i8** %2
%14 = load i32, i32* %3
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds i8, i8* %13, i64 %15
%17 = load i8, i8* %16
%18 = sext i8 %17 to i32
%19 = add nsw i32 %12, %18
store i32 %19, i32* %4
br label %20
20: ; preds = %10
%21 = load i32, i32* %3
%22 = add nsw i32 %21, 1
store i32 %22, i32* %3
br label %5
23: ; preds = %5
%24 = load i32, i32* %4
%25 = srem i32 %24, 10000
ret i32 %25
}

LLVM IR (-O2):
define i32 @get_hash(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp sgt i32 %2, 0
br i1 %3, label %4, label %18
4: ; preds = %1, %4
%5 = phi i64 [ %12, %4 ], [ 0, %1 ]
%6 = phi i32 [ %11, %4 ], [ 7, %1 ]
%7 = mul nsw i32 %6, 31
%8 = getelementptr inbounds i8, i8* %0, i64 %5
%9 = load i8, i8* %8
%10 = sext i8 %9 to i32
%11 = add nsw i32 %7, %10
%12 = add nuw nsw i64 %5, 1
%13 = tail call i32 @strlen(i8* %0)
%14 = sext i32 %13 to i64
%15 = icmp slt i64 %12, %14
br i1 %15, label %4, label %16
16: ; preds = %4
%17 = srem i32 %11, 10000
br label %18
18: ; preds = %16, %1
%19 = phi i32 [ 7, %1 ], [ %17, %16 ]
ret i32 %19
}