#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 */
double atof(char *);
int /*<<< orphan*/ printf(char *, double);
main() {
  printf("%g\n", atof("1.234"));
  printf("%g\n", atof("1e2"));
  printf("%g\n", atof("1e-2"));
  printf("%g\n", atof("123.45e+2"));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
lea    0xed9(%rip),%rdi
call   1030 <atof@plt>
lea    0xec9(%rip),%rdi
call   1040 <printf@plt>
lea    0xec7(%rip),%rdi
call   1030 <atof@plt>
lea    0xeb1(%rip),%rdi
call   1040 <printf@plt>
lea    0xeb3(%rip),%rdi
call   1030 <atof@plt>
lea    0xe99(%rip),%rdi
call   1040 <printf@plt>
lea    0xea0(%rip),%rdi
call   1030 <atof@plt>
lea    0xe81(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xedc(%rip),%rdi
call   1030 <atof@plt>
lea    0xecc(%rip),%rbx
mov    %rbx,%rdi
call   1040 <printf@plt>
lea    0xec7(%rip),%rdi
call   1030 <atof@plt>
mov    %rbx,%rdi
call   1040 <printf@plt>
lea    0xeb7(%rip),%rdi
call   1030 <atof@plt>
mov    %rbx,%rdi
call   1040 <printf@plt>
lea    0xea8(%rip),%rdi
call   1030 <atof@plt>
mov    %rbx,%rdi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%g\0A\00"
@.str.1 = [6 x i8] c"1.234\00"
@.str.2 = [4 x i8] c"1e2\00"
@.str.3 = [5 x i8] c"1e-2\00"
@.str.4 = [10 x i8] c"123.45e+2\00"
define i32 @main() {
%1 = call double @atof(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double %1)
%3 = call double @atof(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double %3)
%5 = call double @atof(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double %5)
%7 = call double @atof(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double %7)
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"%g\0A\00"
@.str.1 = [6 x i8] c"1.234\00"
@.str.2 = [4 x i8] c"1e2\00"
@.str.3 = [5 x i8] c"1e-2\00"
@.str.4 = [10 x i8] c"123.45e+2\00"
define i32 @main() {
%1 = tail call double @atof(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, i64 0, i64 0), double %1)
%3 = tail call double @atof(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%4 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double %3)
%5 = tail call double @atof(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
%6 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double %5)
%7 = tail call double @atof(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0))
%8 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double %7)
ret i32 0
}