#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 */
struct group {
  char *gr_name;
};
typedef int gid_t;

/* Variables and functions */
struct group *getgrgid(int);
int /*<<< orphan*/ sprintf(char *, char *, int);
char *gid_to_name(gid_t gid) {
  struct group *grp_ptr;
  static char numstr[10];
  if ((grp_ptr = getgrgid(gid)) == NULL) {
    sprintf(numstr, "%d", gid);
    return numstr;
  }
  return grp_ptr->gr_name;
}


x86 assembly (clang, -O0):
<gid_to_name>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%edi
call   1030 <getgrgid@plt>
mov    %rax,-0x18(%rbp)
cmp    $0x0,%rax
jne    1167 <gid_to_name+0x47>
mov    -0xc(%rbp),%edx
lea    0x2ee6(%rip),%rdi
lea    0xeae(%rip),%rsi
call   1040 <sprintf@plt>
lea    0x2ed3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1172 <gid_to_name+0x52>
mov    -0x18(%rbp),%rax
mov    (%rax),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<gid_to_name>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebp
call   1030 <getgrgid@plt>
test   %rax,%rax
je     1134 <gid_to_name+0x14>
mov    (%rax),%rbx
jmp    114c <gid_to_name+0x2c>
lea    0x2ef6(%rip),%rbx
lea    0xebe(%rip),%rsi
mov    %rbx,%rdi
mov    %ebp,%edx
call   1040 <sprintf@plt>
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
%struct.group = type { i8* }
@gid_to_name.numstr = internal global [10 x i8] zeroinitializer
@.str = [3 x i8] c"%d\00"
define i8* @gid_to_name(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
%4 = alloca %struct.group*
store i32 %0, i32* %3
%5 = load i32, i32* %3
%6 = call %struct.group* @getgrgid(i32 %5)
store %struct.group* %6, %struct.group** %4
%7 = icmp eq %struct.group* %6, null
br i1 %7, label %8, label %11
8: ; preds = %1
%9 = load i32, i32* %3
%10 = call i32 @sprintf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @gid_to_name.numstr, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %9)
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @gid_to_name.numstr, i64 0, i64 0), i8** %2
br label %15
11: ; preds = %1
%12 = load %struct.group*, %struct.group** %4
%13 = getelementptr inbounds %struct.group, %struct.group* %12, i32 0, i32 0
%14 = load i8*, i8** %13
store i8* %14, i8** %2
br label %15
15: ; preds = %11, %8
%16 = load i8*, i8** %2
ret i8* %16
}

LLVM IR (-O2):
%struct.group = type { i8* }
@gid_to_name.numstr = internal global [10 x i8] zeroinitializer
@.str = [3 x i8] c"%d\00"
define i8* @gid_to_name(i32 %0) {
%2 = tail call %struct.group* @getgrgid(i32 %0)
%3 = icmp eq %struct.group* %2, null
br i1 %3, label %4, label %6
4: ; preds = %1
%5 = tail call i32 @sprintf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @gid_to_name.numstr, i64 0, i64 0), i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %0)
br label %9
6: ; preds = %1
%7 = getelementptr inbounds %struct.group, %struct.group* %2, i64 0, i32 0
%8 = load i8*, i8** %7
br label %9
9: ; preds = %6, %4
%10 = phi i8* [ getelementptr inbounds ([10 x i8], [10 x i8]* @gid_to_name.numstr, i64 0, i64 0), %4 ], [ %8, %6 ]
ret i8* %10
}