#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 */
int EXIT_SUCCESS;
double atof(char *);
double custom_floor(double const);
int /*<<< orphan*/ printf(char *, double const, double const);
int main(int argc, char *argv[]) {
  for (int i = 1; i < argc; i++) {
    const double x = atof(argv[i]);
    const double floor_x = custom_floor(x);
    printf("floor(%0.8f) = %0.8f\n", x, floor_x);
  }
  return EXIT_SUCCESS;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x1,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11a2 <main+0x72>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdi
call   1030 <atof@plt>
movsd  %xmm0,-0x20(%rbp)
movsd  -0x20(%rbp),%xmm0
call   1050 <custom_floor@plt>
movsd  %xmm0,-0x28(%rbp)
movsd  -0x20(%rbp),%xmm0
movsd  -0x28(%rbp),%xmm1
lea    0xe71(%rip),%rdi
call   1040 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    114d <main+0x1d>
mov    0x2e37(%rip),%rax
mov    (%rax),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
cmp    $0x2,%edi
jl     117c <main+0x4c>
mov    %rsi,%r15
mov    %edi,%r12d
mov    $0x1,%ebx
lea    0xeb1(%rip),%r14
nop
mov    (%r15,%rbx,8),%rdi
call   1030 <atof@plt>
movsd  %xmm0,(%rsp)
call   1050 <custom_floor@plt>
movaps %xmm0,%xmm1
mov    %r14,%rdi
movsd  (%rsp),%xmm0
call   1040 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%r12
jne    1150 <main+0x20>
mov    0x2e5d(%rip),%rax
mov    (%rax),%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [22 x i8] c"floor(%0.8f) = %0.8f\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca double
%8 = alloca double
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 1, i32* %6
br label %9
9: ; preds = %25, %2
%10 = load i32, i32* %6
%11 = load i32, i32* %4
%12 = icmp slt i32 %10, %11
br i1 %12, label %13, label %28
13: ; preds = %9
%14 = load i8**, i8*** %5
%15 = load i32, i32* %6
%16 = sext i32 %15 to i64
%17 = getelementptr inbounds i8*, i8** %14, i64 %16
%18 = load i8*, i8** %17
%19 = call double @atof(i8* %18)
store double %19, double* %7
%20 = load double, double* %7
%21 = call double @custom_floor(double %20)
store double %21, double* %8
%22 = load double, double* %7
%23 = load double, double* %8
%24 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), double %22, double %23)
br label %25
25: ; preds = %13
%26 = load i32, i32* %6
%27 = add nsw i32 %26, 1
store i32 %27, i32* %6
br label %9
28: ; preds = %9
%29 = load i32, i32* @EXIT_SUCCESS
ret i32 %29
}

LLVM IR (-O2):
@.str = [22 x i8] c"floor(%0.8f) = %0.8f\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp sgt i32 %0, 1
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = zext i32 %0 to i64
br label %8
6: ; preds = %8, %2
%7 = load i32, i32* @EXIT_SUCCESS
ret i32 %7
8: ; preds = %4, %8
%9 = phi i64 [ 1, %4 ], [ %15, %8 ]
%10 = getelementptr inbounds i8*, i8** %1, i64 %9
%11 = load i8*, i8** %10
%12 = tail call double @atof(i8* %11)
%13 = tail call double @custom_floor(double %12)
%14 = tail call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), double %12, double %13)
%15 = add nuw nsw i64 %9, 1
%16 = icmp eq i64 %15, %5
br i1 %16, label %6, label %8
}