#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 /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *);
scalar_t__ malloc(size_t);
int /*<<< orphan*/ stderr;
float *p_vector(long nl, long nh) {
  float *v;
  v = (float *)malloc((size_t)((nh - nl + 1 + 1) * sizeof(float)));
  if (!v) {
    fprintf(stderr, "allocation failure in vector()");
    exit(1);
  }
  return v - nl + 1;
}


x86 assembly (clang, -O0):
<p_vector>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
sub    -0x8(%rbp),%rdi
add    $0x1,%rdi
add    $0x1,%rdi
shl    $0x2,%rdi
call   1040 <malloc@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    1187 <p_vector+0x57>
mov    0x2e71(%rip),%rax
mov    (%rax),%edi
lea    0xe88(%rip),%rsi
call   1030 <fprintf@plt>
mov    $0x1,%edi
call   1050 <exit@plt>
mov    -0x18(%rbp),%rax
xor    %ecx,%ecx
sub    -0x8(%rbp),%rcx
shl    $0x2,%rcx
add    %rcx,%rax
add    $0x4,%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<p_vector>:
push   %rbx
mov    %rdi,%rbx
sub    %rdi,%rsi
lea    0x8(,%rsi,4),%rdi
call   1040 <malloc@plt>
test   %rax,%rax
je     1156 <p_vector+0x26>
shl    $0x2,%rbx
sub    %rbx,%rax
add    $0x4,%rax
pop    %rbx
ret
mov    0x2e83(%rip),%rax
mov    (%rax),%edi
lea    0xe9a(%rip),%rsi
call   1030 <fprintf@plt>
mov    $0x1,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [31 x i8] c"allocation failure in vector()\00"
define float* @p_vector(i64 %0, i64 %1) {
%3 = alloca i64
%4 = alloca i64
%5 = alloca float*
store i64 %0, i64* %3
store i64 %1, i64* %4
%6 = load i64, i64* %4
%7 = load i64, i64* %3
%8 = sub nsw i64 %6, %7
%9 = add nsw i64 %8, 1
%10 = add nsw i64 %9, 1
%11 = mul i64 %10, 4
%12 = call i64 @malloc(i64 %11)
%13 = inttoptr i64 %12 to float*
store float* %13, float** %5
%14 = load float*, float** %5
%15 = icmp ne float* %14, null
br i1 %15, label %20, label %16
16: ; preds = %2
%17 = load i32, i32* @stderr
%18 = call i32 @fprintf(i32 %17, i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str, i64 0, i64 0))
%19 = call i32 @exit(i32 1)
unreachable
20: ; preds = %2
%21 = load float*, float** %5
%22 = load i64, i64* %3
%23 = sub i64 0, %22
%24 = getelementptr inbounds float, float* %21, i64 %23
%25 = getelementptr inbounds float, float* %24, i64 1
ret float* %25
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [31 x i8] c"allocation failure in vector()\00"
define float* @p_vector(i64 %0, i64 %1) {
%3 = sub nsw i64 %1, %0
%4 = shl i64 %3, 2
%5 = add i64 %4, 8
%6 = tail call i64 @malloc(i64 %5)
%7 = icmp eq i64 %6, 0
br i1 %7, label %8, label %12
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = tail call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str, i64 0, i64 0))
%11 = tail call i32 @exit(i32 1)
unreachable
12: ; preds = %2
%13 = inttoptr i64 %6 to float*
%14 = sub i64 0, %0
%15 = getelementptr inbounds float, float* %13, i64 %14
%16 = getelementptr inbounds float, float* %15, i64 1
ret float* %16
}