#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*/ strcat(char *, char *);
int strlen(char *);
void changesuffix(char *name, char *suffix) {
  int j;
  j = strlen(name) - 1;
  while (j && name[j - 1] != '.')
    j--;
  if (j) {
    name[j - 1] = '\0';
  }
  strcat(name, suffix);
}


x86 assembly (clang, -O0):
<changesuffix>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
call   1030 <strlen@plt>
sub    $0x1,%eax
mov    %eax,-0x14(%rbp)
xor    %eax,%eax
cmpl   $0x0,-0x14(%rbp)
mov    %al,-0x15(%rbp)
je     1168 <changesuffix+0x48>
mov    -0x8(%rbp),%rax
mov    -0x14(%rbp),%ecx
sub    $0x1,%ecx
movslq %ecx,%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x2e,%eax
setne  %al
mov    %al,-0x15(%rbp)
mov    -0x15(%rbp),%al
test   $0x1,%al
jne    1178 <changesuffix+0x58>
jmp    1186 <changesuffix+0x66>
mov    -0x14(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x14(%rbp)
jmp    113f <changesuffix+0x1f>
cmpl   $0x0,-0x14(%rbp)
je     11a1 <changesuffix+0x81>
mov    -0x8(%rbp),%rax
mov    -0x14(%rbp),%ecx
sub    $0x1,%ecx
movslq %ecx,%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1040 <strcat@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<changesuffix>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%rbx
call   1030 <strlen@plt>
cltq
lea    (%rax,%rbx,1),%rcx
add    $0xffffffffffffffff,%rcx
mov    $0x1,%edx
sub    %eax,%edx
xor    %esi,%esi
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
cmp    %esi,%edx
je     116a <changesuffix+0x4a>
lea    -0x1(%rsi),%rdi
cmpb   $0x2e,-0x1(%rcx,%rsi,1)
mov    %rdi,%rsi
jne    1150 <changesuffix+0x30>
add    %rbx,%rax
movb   $0x0,-0x1(%rdi,%rax,1)
mov    %rbx,%rdi
mov    %r14,%rsi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1040 <strcat@plt>

LLVM IR (-O0):
define void @changesuffix(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32
store i8* %0, i8** %3
store i8* %1, i8** %4
%6 = load i8*, i8** %3
%7 = call i32 @strlen(i8* %6)
%8 = sub nsw i32 %7, 1
store i32 %8, i32* %5
br label %9
9: ; preds = %23, %2
%10 = load i32, i32* %5
%11 = icmp ne i32 %10, 0
br i1 %11, label %12, label %21
12: ; preds = %9
%13 = load i8*, i8** %3
%14 = load i32, i32* %5
%15 = sub nsw i32 %14, 1
%16 = sext i32 %15 to i64
%17 = getelementptr inbounds i8, i8* %13, i64 %16
%18 = load i8, i8* %17
%19 = sext i8 %18 to i32
%20 = icmp ne i32 %19, 46
br label %21
21: ; preds = %12, %9
%22 = phi i1 [ false, %9 ], [ %20, %12 ]
br i1 %22, label %23, label %26
23: ; preds = %21
%24 = load i32, i32* %5
%25 = add nsw i32 %24, -1
store i32 %25, i32* %5
br label %9
26: ; preds = %21
%27 = load i32, i32* %5
%28 = icmp ne i32 %27, 0
br i1 %28, label %29, label %35
29: ; preds = %26
%30 = load i8*, i8** %3
%31 = load i32, i32* %5
%32 = sub nsw i32 %31, 1
%33 = sext i32 %32 to i64
%34 = getelementptr inbounds i8, i8* %30, i64 %33
store i8 0, i8* %34
br label %35
35: ; preds = %29, %26
%36 = load i8*, i8** %3
%37 = load i8*, i8** %4
%38 = call i32 @strcat(i8* %36, i8* %37)
ret void
}

LLVM IR (-O2):
define void @changesuffix(i8* %0, i8* %1) {
%3 = tail call i32 @strlen(i8* %0)
%4 = sext i32 %3 to i64
br label %5
5: ; preds = %10, %2
%6 = phi i64 [ %7, %10 ], [ %4, %2 ]
%7 = add nsw i64 %6, -1
%8 = trunc i64 %7 to i32
%9 = icmp eq i32 %8, 0
br i1 %9, label %17, label %10
10: ; preds = %5
%11 = add nsw i64 %6, -2
%12 = getelementptr inbounds i8, i8* %0, i64 %11
%13 = load i8, i8* %12
%14 = icmp eq i8 %13, 46
br i1 %14, label %15, label %5
15: ; preds = %10
%16 = getelementptr inbounds i8, i8* %0, i64 %11
store i8 0, i8* %16
br label %17
17: ; preds = %5, %15
%18 = tail call i32 @strcat(i8* %0, i8* %1)
ret void
}