#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 */
char *UTIL_mallocStr(size_t);
int /*<<< orphan*/ strcat(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
int strlen(char *);
char *C_mkAssign(char *varName, char *varValue) {
  size_t length = strlen(varName) + strlen(varValue) + 5;
  char *assign = UTIL_mallocStr(length);
  strcpy(assign, varName);
  strcat(assign, " = ");
  strcat(assign, varValue);
  return assign;
}


x86 assembly (clang, -O0):
<C_mkAssign>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,-0x24(%rbp)
mov    -0x10(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,%ecx
mov    -0x24(%rbp),%eax
add    %ecx,%eax
add    $0x5,%eax
cltq
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
call   1050 <UTIL_mallocStr@plt>
mov    %rax,-0x20(%rbp)
mov    -0x20(%rbp),%rdi
mov    -0x8(%rbp),%rsi
call   1030 <strcpy@plt>
mov    -0x20(%rbp),%rdi
lea    0xe66(%rip),%rsi
call   1060 <strcat@plt>
mov    -0x20(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1060 <strcat@plt>
mov    -0x20(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<C_mkAssign>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%r12
call   1040 <strlen@plt>
mov    %eax,%r15d
mov    %r14,%rdi
call   1040 <strlen@plt>
add    %r15d,%eax
add    $0x5,%eax
movslq %eax,%rdi
call   1050 <UTIL_mallocStr@plt>
mov    %rax,%rbx
mov    %rax,%rdi
mov    %r12,%rsi
call   1030 <strcpy@plt>
lea    0xe7f(%rip),%rsi
mov    %rbx,%rdi
call   1060 <strcat@plt>
mov    %rbx,%rdi
mov    %r14,%rsi
call   1060 <strcat@plt>
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [4 x i8] c" = \00"
define i8* @C_mkAssign(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i64
%6 = alloca i8*
store i8* %0, i8** %3
store i8* %1, i8** %4
%7 = load i8*, i8** %3
%8 = call i32 @strlen(i8* %7)
%9 = load i8*, i8** %4
%10 = call i32 @strlen(i8* %9)
%11 = add nsw i32 %8, %10
%12 = add nsw i32 %11, 5
%13 = sext i32 %12 to i64
store i64 %13, i64* %5
%14 = load i64, i64* %5
%15 = call i8* @UTIL_mallocStr(i64 %14)
store i8* %15, i8** %6
%16 = load i8*, i8** %6
%17 = load i8*, i8** %3
%18 = call i32 @strcpy(i8* %16, i8* %17)
%19 = load i8*, i8** %6
%20 = call i32 @strcat(i8* %19, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%21 = load i8*, i8** %6
%22 = load i8*, i8** %4
%23 = call i32 @strcat(i8* %21, i8* %22)
%24 = load i8*, i8** %6
ret i8* %24
}

LLVM IR (-O2):
@.str = [4 x i8] c" = \00"
define i8* @C_mkAssign(i8* %0, i8* %1) {
%3 = tail call i32 @strlen(i8* %0)
%4 = tail call i32 @strlen(i8* %1)
%5 = add i32 %3, 5
%6 = add i32 %5, %4
%7 = sext i32 %6 to i64
%8 = tail call i8* @UTIL_mallocStr(i64 %7)
%9 = tail call i32 @strcpy(i8* %8, i8* %0)
%10 = tail call i32 @strcat(i8* %8, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%11 = tail call i32 @strcat(i8* %8, i8* %1)
ret i8* %8
}