int main(void) {
  float minimoDiTreNumeri(float numero1, float numero2, float numero3);
  float minimoDiDueNumeri(float numero1, float numero2);
  float numero1;
  float numero2;
  float numero3;
  printf("%s", "inserisci il primo numero: ");
  scanf("%f", &numero1);
  printf("%s", "inserisci il secondo numero: ");
  scanf("%f", &numero2);
  printf("%s", "inserisci il terzo numero: ");
  scanf("%f", &numero3);
  printf("Il numero piu grande dei tre e': %f",
         minimoDiTreNumeri(numero1, numero2, numero3));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
lea    0xeb6(%rip),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf1f(%rip),%rdi
lea    -0x8(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
lea    0xe93(%rip),%rdi
lea    0xeab(%rip),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xef8(%rip),%rdi
lea    -0xc(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
lea    0xe6c(%rip),%rdi
lea    0xea2(%rip),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
lea    -0x10(%rbp),%rsi
mov    $0x0,%al
call   1050 <scanf@plt>
movss  -0x8(%rbp),%xmm0
movss  -0xc(%rbp),%xmm1
movss  -0x10(%rbp),%xmm2
call   1040 <minimoDiTreNumeri@plt>
cvtss2sd %xmm0,%xmm0
lea    0xe86(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x18,%rsp
lea    0xec2(%rip),%r14
lea    0xebe(%rip),%rsi
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xf24(%rip),%rbx
lea    0x14(%rsp),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <scanf@plt>
lea    0xeb3(%rip),%rsi
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x10(%rsp),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <scanf@plt>
lea    0xeb1(%rip),%rsi
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
xor    %eax,%eax
call   1050 <scanf@plt>
movss  0x14(%rsp),%xmm0
movss  0x10(%rsp),%xmm1
movss  0xc(%rsp),%xmm2
call   1040 <minimoDiTreNumeri@plt>
cvtss2sd %xmm0,%xmm0
lea    0xe92(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%s\00"
@.str.1 = [28 x i8] c"inserisci il primo numero: \00"
@.str.2 = [3 x i8] c"%f\00"
@.str.3 = [30 x i8] c"inserisci il secondo numero: \00"
@.str.4 = [28 x i8] c"inserisci il terzo numero: \00"
@.str.5 = [36 x i8] c"Il numero piu grande dei tre e': %f\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
%4 = alloca float
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.1, i64 0, i64 0))
%6 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %2)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0))
%8 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %3)
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.4, i64 0, i64 0))
%10 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %4)
%11 = load float, float* %2
%12 = load float, float* %3
%13 = load float, float* %4
%14 = call float @minimoDiTreNumeri(float %11, float %12, float %13)
%15 = fpext float %14 to double
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.5, i64 0, i64 0), double %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%s\00"
@.str.1 = [28 x i8] c"inserisci il primo numero: \00"
@.str.2 = [3 x i8] c"%f\00"
@.str.3 = [30 x i8] c"inserisci il secondo numero: \00"
@.str.4 = [28 x i8] c"inserisci il terzo numero: \00"
@.str.5 = [36 x i8] c"Il numero piu grande dei tre e': %f\00"
define i32 @main() {
%1 = alloca float
%2 = alloca float
%3 = alloca float
%4 = bitcast float* %1 to i8*
%5 = bitcast float* %2 to i8*
%6 = bitcast float* %3 to i8*
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.1, i64 0, i64 0))
%8 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %1)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0))
%10 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %2)
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.4, i64 0, i64 0))
%12 = call i32 (i8*, ...) @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), float* %3)
%13 = load float, float* %1
%14 = load float, float* %2
%15 = load float, float* %3
%16 = call float @minimoDiTreNumeri(float %13, float %14, float %15)
%17 = fpext float %16 to double
%18 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @.str.5, i64 0, i64 0), double %17)
ret i32 0
}