#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
double erffc(float);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
scalar_t__ feof(int /*<<< orphan*/ *);
int /*<<< orphan*/ fgets(char *, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fscanf(int /*<<< orphan*/ *, char *, ...);
int /*<<< orphan*/ nrerror(char *);
int /*<<< orphan*/ printf(char *, ...);
scalar_t__ strncmp(char *, char *, int);
int main(void) {
  char txt[80];
  int i, nval;
  float x, val;
  FILE *fp;
  if ((fp = fopen("fncval.dat", "r")) == NULL)
    nrerror("Data file fncval.dat not found\n");
  fgets(txt, 80, fp);
  while (strncmp(txt, "Error Function", 14)) {
    fgets(txt, 80, fp);
    if (feof(fp))
      nrerror("Data not found in fncval.dat\n");
  }
  fscanf(fp, "%d %*s", &nval);
  printf("\ncomplementary error function\n");
  printf("%5s %12s %13s\n", "x", "actual", "erfc(x)");
  for (i = 1; i <= nval; i++) {
    fscanf(fp, "%f %f", &x, &val);
    val = 1.0 - val;
    printf("%6.2f %12.7f %12.7f\n", x, val, erffc(x));
  }
  fclose(fp);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x90,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe5f(%rip),%rdi
lea    0xe63(%rip),%rsi
call   10a0 <fopen@plt>
mov    %rax,-0x78(%rbp)
cmp    $0x0,%rax
jne    11cf <main+0x3f>
lea    0xe4b(%rip),%rdi
call   1040 <nrerror@plt>
lea    -0x60(%rbp),%rdi
mov    -0x78(%rbp),%rdx
mov    $0x50,%esi
call   1080 <fgets@plt>
lea    -0x60(%rbp),%rdi
lea    0xe49(%rip),%rsi
mov    $0xe,%edx
call   1030 <strncmp@plt>
cmp    $0x0,%rax
je     1236 <main+0xa6>
lea    -0x60(%rbp),%rdi
mov    -0x78(%rbp),%rdx
mov    $0x50,%esi
call   1080 <fgets@plt>
mov    -0x78(%rbp),%rdi
call   1090 <feof@plt>
cmp    $0x0,%rax
je     1231 <main+0xa1>
lea    0xe18(%rip),%rdi
call   1040 <nrerror@plt>
jmp    11e1 <main+0x51>
mov    -0x78(%rbp),%rdi
lea    0xe21(%rip),%rsi
lea    -0x68(%rbp),%rdx
mov    $0x0,%al
call   1070 <fscanf@plt>
lea    0xe16(%rip),%rdi
mov    $0x0,%al
call   1060 <printf@plt>
lea    0xe27(%rip),%rdi
lea    0xe2f(%rip),%rsi
lea    0xe2a(%rip),%rdx
lea    0xe2a(%rip),%rcx
mov    $0x0,%al
call   1060 <printf@plt>
movl   $0x1,-0x64(%rbp)
mov    -0x64(%rbp),%eax
cmp    -0x68(%rbp),%eax
jg     131d <main+0x18d>
mov    -0x78(%rbp),%rdi
lea    0xe0d(%rip),%rsi
lea    -0x6c(%rbp),%rdx
lea    -0x70(%rbp),%rcx
mov    $0x0,%al
call   1070 <fscanf@plt>
movss  -0x70(%rbp),%xmm0
cvtss2sd %xmm0,%xmm1
movsd  0xd45(%rip),%xmm0
subsd  %xmm1,%xmm0
cvtsd2ss %xmm0,%xmm0
movss  %xmm0,-0x70(%rbp)
movss  -0x6c(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  %xmm0,-0x80(%rbp)
movss  -0x70(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
movsd  %xmm0,-0x88(%rbp)
ff
movss  -0x6c(%rbp),%xmm0
call   10b0 <erffc@plt>
movsd  -0x88(%rbp),%xmm1
ff
movaps %xmm0,%xmm2
movsd  -0x80(%rbp),%xmm0
lea    0xda6(%rip),%rdi
mov    $0x3,%al
call   1060 <printf@plt>
mov    -0x64(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x64(%rbp)
jmp    1284 <main+0xf4>
mov    -0x78(%rbp),%rdi
call   1050 <fclose@plt>
xor    %eax,%eax
add    $0x90,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x78,%rsp
lea    0xe4f(%rip),%rdi
lea    0xe53(%rip),%rsi
call   10b0 <fopen@plt>
mov    %rax,%rbx
test   %rax,%rax
jne    11d5 <main+0x35>
lea    0xe41(%rip),%rdi
call   1050 <nrerror@plt>
lea    0x20(%rsp),%r14
mov    %r14,%rdi
mov    $0x50,%esi
mov    %rbx,%rdx
call   1090 <fgets@plt>
lea    0xe40(%rip),%rsi
mov    %r14,%rdi
mov    $0xe,%edx
call   1030 <strncmp@plt>
test   %rax,%rax
je     125c <main+0xbc>
lea    0x20(%rsp),%r14
lea    0xe22(%rip),%r15
lea    0xe2a(%rip),%r12
jmp    1235 <main+0x95>
nopl   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %r15,%rsi
mov    $0xe,%edx
call   1030 <strncmp@plt>
test   %rax,%rax
je     125c <main+0xbc>
mov    %r14,%rdi
mov    $0x50,%esi
mov    %rbx,%rdx
call   1090 <fgets@plt>
mov    %rbx,%rdi
call   10a0 <feof@plt>
test   %rax,%rax
je     1220 <main+0x80>
mov    %r12,%rdi
call   1050 <nrerror@plt>
jmp    1220 <main+0x80>
lea    0xdfb(%rip),%rsi
lea    0x8(%rsp),%rdx
mov    %rbx,%rdi
xor    %eax,%eax
call   1080 <fscanf@plt>
lea    0xe27(%rip),%rdi
call   1040 <puts@plt>
lea    0xde0(%rip),%rdi
lea    0xde8(%rip),%rsi
lea    0xde3(%rip),%rdx
lea    0xde3(%rip),%rcx
xor    %eax,%eax
call   1070 <printf@plt>
cmpl   $0x0,0x8(%rsp)
jle    133b <main+0x19b>
lea    0xdd2(%rip),%r14
lea    0xc(%rsp),%r15
lea    0x4(%rsp),%r12
lea    0xdc7(%rip),%r13
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
mov    %rbx,%rdi
mov    %r14,%rsi
mov    %r15,%rdx
mov    %r12,%rcx
xor    %eax,%eax
call   1080 <fscanf@plt>
movss  0xd15(%rip),%xmm1
subss  0x4(%rsp),%xmm1
movss  %xmm1,0x4(%rsp)
movss  0xc(%rsp),%xmm0
xorps  %xmm2,%xmm2
cvtss2sd %xmm0,%xmm2
movsd  %xmm2,0x18(%rsp)
cvtss2sd %xmm1,%xmm1
movsd  %xmm1,0x10(%rsp)
call   10c0 <erffc@plt>
movaps %xmm0,%xmm2
mov    %r13,%rdi
movsd  0x18(%rsp),%xmm0
movsd  0x10(%rsp),%xmm1
mov    $0x3,%al
call   1070 <printf@plt>
add    $0x1,%ebp
cmp    0x8(%rsp),%ebp
jl     12d0 <main+0x130>
mov    %rbx,%rdi
call   1060 <fclose@plt>
xor    %eax,%eax
add    $0x78,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [11 x i8] c"fncval.dat\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [32 x i8] c"Data file fncval.dat not found\0A\00"
@.str.3 = [15 x i8] c"Error Function\00"
@.str.4 = [30 x i8] c"Data not found in fncval.dat\0A\00"
@.str.5 = [7 x i8] c"%d %*s\00"
@.str.6 = [31 x i8] c"\0Acomplementary error function\0A\00"
@.str.7 = [15 x i8] c"%5s %12s %13s\0A\00"
@.str.8 = [2 x i8] c"x\00"
@.str.9 = [7 x i8] c"actual\00"
@.str.10 = [8 x i8] c"erfc(x)\00"
@.str.11 = [6 x i8] c"%f %f\00"
@.str.12 = [21 x i8] c"%6.2f %12.7f %12.7f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [80 x i8]
%3 = alloca i32
%4 = alloca i32
%5 = alloca float
%6 = alloca float
%7 = alloca i32*
store i32 0, i32* %1
%8 = call i32* @fopen(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %8, i32** %7
%9 = icmp eq i32* %8, null
br i1 %9, label %10, label %12
10: ; preds = %0
%11 = call i32 @nrerror(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.2, i64 0, i64 0))
br label %12
12: ; preds = %10, %0
%13 = getelementptr inbounds [80 x i8], [80 x i8]* %2, i64 0, i64 0
%14 = load i32*, i32** %7
%15 = call i32 @fgets(i8* %13, i32 80, i32* %14)
br label %16
16: ; preds = %29, %12
%17 = getelementptr inbounds [80 x i8], [80 x i8]* %2, i64 0, i64 0
%18 = call i64 @strncmp(i8* %17, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i32 14)
%19 = icmp ne i64 %18, 0
br i1 %19, label %20, label %30
20: ; preds = %16
%21 = getelementptr inbounds [80 x i8], [80 x i8]* %2, i64 0, i64 0
%22 = load i32*, i32** %7
%23 = call i32 @fgets(i8* %21, i32 80, i32* %22)
%24 = load i32*, i32** %7
%25 = call i64 @feof(i32* %24)
%26 = icmp ne i64 %25, 0
br i1 %26, label %27, label %29
27: ; preds = %20
%28 = call i32 @nrerror(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.4, i64 0, i64 0))
br label %29
29: ; preds = %27, %20
br label %16
30: ; preds = %16
%31 = load i32*, i32** %7
%32 = call i32 (i32*, i8*, ...) @fscanf(i32* %31, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i32* %4)
%33 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.6, i64 0, i64 0))
%34 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.7, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.8, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.9, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.10, i64 0, i64 0))
store i32 1, i32* %3
br label %35
35: ; preds = %53, %30
%36 = load i32, i32* %3
%37 = load i32, i32* %4
%38 = icmp sle i32 %36, %37
br i1 %38, label %39, label %56
39: ; preds = %35
%40 = load i32*, i32** %7
%41 = call i32 (i32*, i8*, ...) @fscanf(i32* %40, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.11, i64 0, i64 0), float* %5, float* %6)
%42 = load float, float* %6
%43 = fpext float %42 to double
%44 = fsub double 1.000000e+00, %43
%45 = fptrunc double %44 to float
store float %45, float* %6
%46 = load float, float* %5
%47 = fpext float %46 to double
%48 = load float, float* %6
%49 = fpext float %48 to double
%50 = load float, float* %5
%51 = call double @erffc(float %50)
%52 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.12, i64 0, i64 0), double %47, double %49, double %51)
br label %53
53: ; preds = %39
%54 = load i32, i32* %3
%55 = add nsw i32 %54, 1
store i32 %55, i32* %3
br label %35
56: ; preds = %35
%57 = load i32*, i32** %7
%58 = call i32 @fclose(i32* %57)
ret i32 0
}

LLVM IR (-O2):
@.str = [11 x i8] c"fncval.dat\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [32 x i8] c"Data file fncval.dat not found\0A\00"
@.str.3 = [15 x i8] c"Error Function\00"
@.str.4 = [30 x i8] c"Data not found in fncval.dat\0A\00"
@.str.5 = [7 x i8] c"%d %*s\00"
@.str.7 = [15 x i8] c"%5s %12s %13s\0A\00"
@.str.8 = [2 x i8] c"x\00"
@.str.9 = [7 x i8] c"actual\00"
@.str.10 = [8 x i8] c"erfc(x)\00"
@.str.11 = [6 x i8] c"%f %f\00"
@.str.12 = [21 x i8] c"%6.2f %12.7f %12.7f\0A\00"
@str = [30 x i8] c"\0Acomplementary error function\00"
define i32 @main() {
%1 = alloca [80 x i8]
%2 = alloca i32
%3 = alloca float
%4 = alloca float
%5 = getelementptr inbounds [80 x i8], [80 x i8]* %1, i64 0, i64 0
%6 = bitcast i32* %2 to i8*
%7 = bitcast float* %3 to i8*
%8 = bitcast float* %4 to i8*
%9 = tail call i32* @fopen(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%10 = icmp eq i32* %9, null
br i1 %10, label %11, label %13
11: ; preds = %0
%12 = tail call i32 @nrerror(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.2, i64 0, i64 0))
br label %13
13: ; preds = %11, %0
%14 = call i32 @fgets(i8* %5, i32 80, i32* %9)
%15 = call i64 @strncmp(i8* %5, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i32 14)
%16 = icmp eq i64 %15, 0
br i1 %16, label %26, label %17
17: ; preds = %13, %23
%18 = call i32 @fgets(i8* %5, i32 80, i32* %9)
%19 = call i64 @feof(i32* %9)
%20 = icmp eq i64 %19, 0
br i1 %20, label %23, label %21
21: ; preds = %17
%22 = call i32 @nrerror(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.4, i64 0, i64 0))
br label %23
23: ; preds = %21, %17
%24 = call i64 @strncmp(i8* %5, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i32 14)
%25 = icmp eq i64 %24, 0
br i1 %25, label %26, label %17
26: ; preds = %23, %13
%27 = call i32 (i32*, i8*, ...) @fscanf(i32* %9, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i32* %2)
%28 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0))
%29 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.7, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.8, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.9, i64 0, i64 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.10, i64 0, i64 0))
%30 = load i32, i32* %2
%31 = icmp slt i32 %30, 1
br i1 %31, label %45, label %32
32: ; preds = %26, %32
%33 = phi i32 [ %42, %32 ], [ 1, %26 ]
%34 = call i32 (i32*, i8*, ...) @fscanf(i32* %9, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.11, i64 0, i64 0), float* %3, float* %4)
%35 = load float, float* %4
%36 = fsub float 1.000000e+00, %35
store float %36, float* %4
%37 = load float, float* %3
%38 = fpext float %37 to double
%39 = fpext float %36 to double
%40 = call double @erffc(float %37)
%41 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.12, i64 0, i64 0), double %38, double %39, double %40)
%42 = add nuw nsw i32 %33, 1
%43 = load i32, i32* %2
%44 = icmp slt i32 %33, %43
br i1 %44, label %32, label %45
45: ; preds = %32, %26
%46 = call i32 @fclose(i32* %9)
ret i32 0
}