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


x86 assembly (clang, -O0):
<dvector>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    %esi,-0x8(%rbp)
mov    -0x8(%rbp),%eax
sub    -0x4(%rbp),%eax
add    $0x1,%eax
add    $0x1,%eax
movslq %eax,%rdi
shl    $0x2,%rdi
call   1040 <malloc@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
jne    1161 <dvector+0x41>
lea    0xea4(%rip),%rdi
call   1030 <nrerror@plt>
mov    -0x10(%rbp),%rax
movslq -0x4(%rbp),%rdx
xor    %ecx,%ecx
sub    %rdx,%rcx
shl    $0x2,%rcx
add    %rcx,%rax
add    $0x4,%rax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<dvector>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebp
sub    %edi,%esi
add    $0x2,%esi
movslq %esi,%rdi
shl    $0x2,%rdi
call   1040 <malloc@plt>
mov    %rax,%rbx
test   %rax,%rax
jne    114a <dvector+0x2a>
lea    0xebb(%rip),%rdi
call   1030 <nrerror@plt>
movslq %ebp,%rax
shl    $0x2,%rax
sub    %rax,%rbx
add    $0x4,%rbx
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [32 x i8] c"allocation failure in dvector()\00"
define float* @dvector(i32 %0, i32 %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca float*
store i32 %0, i32* %3
store i32 %1, i32* %4
%6 = load i32, i32* %4
%7 = load i32, i32* %3
%8 = sub nsw i32 %6, %7
%9 = add nsw i32 %8, 1
%10 = add nsw i32 %9, 1
%11 = sext i32 %10 to i64
%12 = mul i64 %11, 4
%13 = call i64 @malloc(i64 %12)
%14 = inttoptr i64 %13 to float*
store float* %14, float** %5
%15 = load float*, float** %5
%16 = icmp ne float* %15, null
br i1 %16, label %19, label %17
17: ; preds = %2
%18 = call i32 @nrerror(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
br label %19
19: ; preds = %17, %2
%20 = load float*, float** %5
%21 = load i32, i32* %3
%22 = sext i32 %21 to i64
%23 = sub i64 0, %22
%24 = getelementptr inbounds float, float* %20, i64 %23
%25 = getelementptr inbounds float, float* %24, i64 1
ret float* %25
}

LLVM IR (-O2):
@.str = [32 x i8] c"allocation failure in dvector()\00"
define float* @dvector(i32 %0, i32 %1) {
%3 = sub i32 2, %0
%4 = add i32 %3, %1
%5 = sext i32 %4 to i64
%6 = shl nsw i64 %5, 2
%7 = tail call i64 @malloc(i64 %6)
%8 = icmp eq i64 %7, 0
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = tail call i32 @nrerror(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
br label %11
11: ; preds = %9, %2
%12 = inttoptr i64 %7 to float*
%13 = sext i32 %0 to i64
%14 = sub nsw i64 0, %13
%15 = getelementptr inbounds float, float* %12, i64 %14
%16 = getelementptr inbounds float, float* %15, i64 1
ret float* %16
}