#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);
int main() {
  printf("0 -> %e\n", atof("0"));
  printf("123.456 -> %g\n", atof("123.456"));
  printf("-67.890 -> %g\n", atof("-67.89"));
  printf("1.23e+20 -> %g\n", atof("1.23e+20"));
  printf("-4.56E-6 -> %g\n", atof("-4.56E-6"));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
lea    0xf22(%rip),%rdi
call   1030 <atof@plt>
lea    0xec9(%rip),%rdi
call   1040 <printf@plt>
lea    0xed5(%rip),%rdi
call   1030 <atof@plt>
lea    0xeba(%rip),%rdi
call   1040 <printf@plt>
lea    0xed4(%rip),%rdi
call   1030 <atof@plt>
lea    0xeb9(%rip),%rdi
call   1040 <printf@plt>
lea    0xed3(%rip),%rdi
call   1030 <atof@plt>
lea    0xeb7(%rip),%rdi
call   1040 <printf@plt>
lea    0xed4(%rip),%rdi
call   1030 <atof@plt>
lea    0xeb8(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xf25(%rip),%rdi
call   1030 <atof@plt>
lea    0xecc(%rip),%rdi
call   1040 <printf@plt>
lea    0xed8(%rip),%rdi
call   1030 <atof@plt>
lea    0xebd(%rip),%rdi
call   1040 <printf@plt>
lea    0xed7(%rip),%rdi
call   1030 <atof@plt>
lea    0xebc(%rip),%rdi
call   1040 <printf@plt>
lea    0xed6(%rip),%rdi
call   1030 <atof@plt>
lea    0xeba(%rip),%rdi
call   1040 <printf@plt>
lea    0xed7(%rip),%rdi
call   1030 <atof@plt>
lea    0xebb(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [9 x i8] c"0 -> %e\0A\00"
@.str.1 = [2 x i8] c"0\00"
@.str.2 = [15 x i8] c"123.456 -> %g\0A\00"
@.str.3 = [8 x i8] c"123.456\00"
@.str.4 = [15 x i8] c"-67.890 -> %g\0A\00"
@.str.5 = [7 x i8] c"-67.89\00"
@.str.6 = [16 x i8] c"1.23e+20 -> %g\0A\00"
@.str.7 = [9 x i8] c"1.23e+20\00"
@.str.8 = [16 x i8] c"-4.56E-6 -> %g\0A\00"
@.str.9 = [9 x i8] c"-4.56E-6\00"
define i32 @main() {
%1 = call double @atof(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%2 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), double %1)
%3 = call double @atof(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), double %3)
%5 = call double @atof(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0), double %5)
%7 = call double @atof(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.6, i64 0, i64 0), double %7)
%9 = call double @atof(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.9, i64 0, i64 0))
%10 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.8, i64 0, i64 0), double %9)
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"0 -> %e\0A\00"
@.str.1 = [2 x i8] c"0\00"
@.str.2 = [15 x i8] c"123.456 -> %g\0A\00"
@.str.3 = [8 x i8] c"123.456\00"
@.str.4 = [15 x i8] c"-67.890 -> %g\0A\00"
@.str.5 = [7 x i8] c"-67.89\00"
@.str.6 = [16 x i8] c"1.23e+20 -> %g\0A\00"
@.str.7 = [9 x i8] c"1.23e+20\00"
@.str.8 = [16 x i8] c"-4.56E-6 -> %g\0A\00"
@.str.9 = [9 x i8] c"-4.56E-6\00"
define i32 @main() {
%1 = tail call double @atof(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%2 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), double %1)
%3 = tail call double @atof(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0))
%4 = tail call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.2, i64 0, i64 0), double %3)
%5 = tail call double @atof(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0))
%6 = tail call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0), double %5)
%7 = tail call double @atof(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0))
%8 = tail call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.6, i64 0, i64 0), double %7)
%9 = tail call double @atof(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.9, i64 0, i64 0))
%10 = tail call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.8, i64 0, i64 0), double %9)
ret i32 0
}