#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 const w0;
typedef int /*<<< orphan*/ uint8_t;
typedef int uint64_t;

/* Variables and functions */
void unpackforblock2_64(const uint64_t base, const uint8_t **pw,
                        uint64_t **pout) {
  const uint64_t *pw64 = *(const uint64_t **)pw;
  uint64_t *out = *pout;
  const uint64_t mask = (3ULL);
  uint64_t w0 = pw64[0];
  *pw += 8;
  out[0] = base + ((w0)&mask);
  out[1] = base + ((w0 >> 2) & mask);
  out[2] = base + ((w0 >> 4) & mask);
  out[3] = base + ((w0 >> 6) & mask);
  out[4] = base + ((w0 >> 8) & mask);
  out[5] = base + ((w0 >> 10) & mask);
  out[6] = base + ((w0 >> 12) & mask);
  out[7] = base + ((w0 >> 14) & mask);
  out[8] = base + ((w0 >> 16) & mask);
  out[9] = base + ((w0 >> 18) & mask);
  out[10] = base + ((w0 >> 20) & mask);
  out[11] = base + ((w0 >> 22) & mask);
  out[12] = base + ((w0 >> 24) & mask);
  out[13] = base + ((w0 >> 26) & mask);
  out[14] = base + ((w0 >> 28) & mask);
  out[15] = base + ((w0 >> 30) & mask);
  out[16] = base + ((w0 >> 32) & mask);
  out[17] = base + ((w0 >> 34) & mask);
  out[18] = base + ((w0 >> 36) & mask);
  out[19] = base + ((w0 >> 38) & mask);
  out[20] = base + ((w0 >> 40) & mask);
  out[21] = base + ((w0 >> 42) & mask);
  out[22] = base + ((w0 >> 44) & mask);
  out[23] = base + ((w0 >> 46) & mask);
  out[24] = base + ((w0 >> 48) & mask);
  out[25] = base + ((w0 >> 50) & mask);
  out[26] = base + ((w0 >> 52) & mask);
  out[27] = base + ((w0 >> 54) & mask);
  out[28] = base + ((w0 >> 56) & mask);
  out[29] = base + ((w0 >> 58) & mask);
  out[30] = base + ((w0 >> 60) & mask);
  out[31] = base + (w0 >> 62);
  *pout += 32;
}


x86 assembly (clang, -O0):
<unpackforblock2_64>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    -0x10(%rbp),%rax
mov    (%rax),%rax
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rax
mov    (%rax),%rax
mov    %rax,-0x28(%rbp)
movl   $0x3,-0x2c(%rbp)
mov    -0x20(%rbp),%rax
mov    (%rax),%eax
mov    %eax,-0x30(%rbp)
mov    -0x10(%rbp),%rax
mov    (%rax),%rcx
add    $0x20,%rcx
mov    %rcx,(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x2,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x4(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x4,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x8(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x6,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0xc(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x8,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x10(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0xa,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x14(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0xc,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x18(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0xe,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x1c(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x10,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x20(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x12,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x24(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x14,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x28(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x16,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x2c(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x18,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x30(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x1a,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x34(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x1c,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x38(%rax)
mov    -0x4(%rbp),%ecx
mov    -0x30(%rbp),%eax
sar    $0x1e,%eax
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x3c(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x70(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x20,%ecx
sar    %cl,%eax
mov    -0x70(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x40(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x6c(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x22,%ecx
sar    %cl,%eax
mov    -0x6c(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x44(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x68(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x24,%ecx
sar    %cl,%eax
mov    -0x68(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x48(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x64(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x26,%ecx
sar    %cl,%eax
mov    -0x64(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x4c(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x60(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x28,%ecx
sar    %cl,%eax
mov    -0x60(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x50(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x5c(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x2a,%ecx
sar    %cl,%eax
mov    -0x5c(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x54(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x58(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x2c,%ecx
sar    %cl,%eax
mov    -0x58(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x58(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x54(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x2e,%ecx
sar    %cl,%eax
mov    -0x54(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x5c(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x50(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x30,%ecx
sar    %cl,%eax
mov    -0x50(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x60(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x4c(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x32,%ecx
sar    %cl,%eax
mov    -0x4c(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x64(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x48(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x34,%ecx
sar    %cl,%eax
mov    -0x48(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x68(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x44(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x36,%ecx
sar    %cl,%eax
mov    -0x44(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x6c(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x40(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x38,%ecx
sar    %cl,%eax
mov    -0x40(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x70(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x3c(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x3a,%ecx
sar    %cl,%eax
mov    -0x3c(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x74(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x38(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x3c,%ecx
sar    %cl,%eax
mov    -0x38(%rbp),%ecx
and    $0x3,%eax
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x78(%rax)
mov    -0x4(%rbp),%eax
mov    %eax,-0x34(%rbp)
mov    -0x30(%rbp),%eax
mov    $0x3e,%ecx
sar    %cl,%eax
mov    -0x34(%rbp),%ecx
add    %eax,%ecx
mov    -0x28(%rbp),%rax
mov    %ecx,0x7c(%rax)
mov    -0x18(%rbp),%rax
mov    (%rax),%rcx
add    $0x80,%rcx
mov    %rcx,(%rax)
pop    %rbp
ret

x86 assembly (clang, -O2):
<unpackforblock2_64>:
mov    (%rsi),%rax
mov    (%rdx),%r8
mov    (%rax),%r9d
add    $0x20,%rax
mov    %rax,(%rsi)
mov    %r9d,%eax
shr    $0x2,%eax
mov    %r9d,%esi
shr    $0x4,%esi
mov    %r9d,%ecx
shr    $0x6,%ecx
movd   %ecx,%xmm0
movd   %esi,%xmm1
punpckldq %xmm0,%xmm1
movd   %r9d,%xmm0
movd   %eax,%xmm2
punpckldq %xmm2,%xmm0
punpcklqdq %xmm1,%xmm0
pand   0xeb9(%rip),%xmm0
movd   %edi,%xmm1
pshufd $0x0,%xmm1,%xmm1
paddd  %xmm0,%xmm1
movdqu %xmm1,(%r8)
mov    %r9d,%eax
shr    $0x8,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x10(%r8)
mov    %r9d,%eax
shr    $0xa,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x14(%r8)
mov    %r9d,%eax
shr    $0xc,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x18(%r8)
mov    %r9d,%eax
shr    $0xe,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x1c(%r8)
mov    %r9d,%eax
shr    $0x10,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x20(%r8)
mov    %r9d,%eax
shr    $0x12,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x24(%r8)
mov    %r9d,%eax
shr    $0x14,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x28(%r8)
mov    %r9d,%eax
shr    $0x16,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x2c(%r8)
mov    %r9d,%eax
shr    $0x18,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x30(%r8)
mov    %r9d,%eax
shr    $0x1a,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x34(%r8)
mov    %r9d,%eax
shr    $0x1c,%eax
and    $0x3,%eax
add    %edi,%eax
mov    %eax,0x38(%r8)
shr    $0x1e,%r9d
add    %edi,%r9d
mov    %r9d,0x3c(%r8)
subq   $0xffffffffffffff80,(%rdx)
ret

LLVM IR (-O0):
define void @unpackforblock2_64(i32 %0, i32** %1, i32** %2) {
%4 = alloca i32
%5 = alloca i32**
%6 = alloca i32**
%7 = alloca i32*
%8 = alloca i32*
%9 = alloca i32
%10 = alloca i32
store i32 %0, i32* %4
store i32** %1, i32*** %5
store i32** %2, i32*** %6
%11 = load i32**, i32*** %5
%12 = load i32*, i32** %11
store i32* %12, i32** %7
%13 = load i32**, i32*** %6
%14 = load i32*, i32** %13
store i32* %14, i32** %8
store i32 3, i32* %9
%15 = load i32*, i32** %7
%16 = getelementptr inbounds i32, i32* %15, i64 0
%17 = load i32, i32* %16
store i32 %17, i32* %10
%18 = load i32**, i32*** %5
%19 = load i32*, i32** %18
%20 = getelementptr inbounds i32, i32* %19, i64 8
store i32* %20, i32** %18
%21 = load i32, i32* %4
%22 = load i32, i32* %10
%23 = and i32 %22, 3
%24 = add nsw i32 %21, %23
%25 = load i32*, i32** %8
%26 = getelementptr inbounds i32, i32* %25, i64 0
store i32 %24, i32* %26
%27 = load i32, i32* %4
%28 = load i32, i32* %10
%29 = ashr i32 %28, 2
%30 = and i32 %29, 3
%31 = add nsw i32 %27, %30
%32 = load i32*, i32** %8
%33 = getelementptr inbounds i32, i32* %32, i64 1
store i32 %31, i32* %33
%34 = load i32, i32* %4
%35 = load i32, i32* %10
%36 = ashr i32 %35, 4
%37 = and i32 %36, 3
%38 = add nsw i32 %34, %37
%39 = load i32*, i32** %8
%40 = getelementptr inbounds i32, i32* %39, i64 2
store i32 %38, i32* %40
%41 = load i32, i32* %4
%42 = load i32, i32* %10
%43 = ashr i32 %42, 6
%44 = and i32 %43, 3
%45 = add nsw i32 %41, %44
%46 = load i32*, i32** %8
%47 = getelementptr inbounds i32, i32* %46, i64 3
store i32 %45, i32* %47
%48 = load i32, i32* %4
%49 = load i32, i32* %10
%50 = ashr i32 %49, 8
%51 = and i32 %50, 3
%52 = add nsw i32 %48, %51
%53 = load i32*, i32** %8
%54 = getelementptr inbounds i32, i32* %53, i64 4
store i32 %52, i32* %54
%55 = load i32, i32* %4
%56 = load i32, i32* %10
%57 = ashr i32 %56, 10
%58 = and i32 %57, 3
%59 = add nsw i32 %55, %58
%60 = load i32*, i32** %8
%61 = getelementptr inbounds i32, i32* %60, i64 5
store i32 %59, i32* %61
%62 = load i32, i32* %4
%63 = load i32, i32* %10
%64 = ashr i32 %63, 12
%65 = and i32 %64, 3
%66 = add nsw i32 %62, %65
%67 = load i32*, i32** %8
%68 = getelementptr inbounds i32, i32* %67, i64 6
store i32 %66, i32* %68
%69 = load i32, i32* %4
%70 = load i32, i32* %10
%71 = ashr i32 %70, 14
%72 = and i32 %71, 3
%73 = add nsw i32 %69, %72
%74 = load i32*, i32** %8
%75 = getelementptr inbounds i32, i32* %74, i64 7
store i32 %73, i32* %75
%76 = load i32, i32* %4
%77 = load i32, i32* %10
%78 = ashr i32 %77, 16
%79 = and i32 %78, 3
%80 = add nsw i32 %76, %79
%81 = load i32*, i32** %8
%82 = getelementptr inbounds i32, i32* %81, i64 8
store i32 %80, i32* %82
%83 = load i32, i32* %4
%84 = load i32, i32* %10
%85 = ashr i32 %84, 18
%86 = and i32 %85, 3
%87 = add nsw i32 %83, %86
%88 = load i32*, i32** %8
%89 = getelementptr inbounds i32, i32* %88, i64 9
store i32 %87, i32* %89
%90 = load i32, i32* %4
%91 = load i32, i32* %10
%92 = ashr i32 %91, 20
%93 = and i32 %92, 3
%94 = add nsw i32 %90, %93
%95 = load i32*, i32** %8
%96 = getelementptr inbounds i32, i32* %95, i64 10
store i32 %94, i32* %96
%97 = load i32, i32* %4
%98 = load i32, i32* %10
%99 = ashr i32 %98, 22
%100 = and i32 %99, 3
%101 = add nsw i32 %97, %100
%102 = load i32*, i32** %8
%103 = getelementptr inbounds i32, i32* %102, i64 11
store i32 %101, i32* %103
%104 = load i32, i32* %4
%105 = load i32, i32* %10
%106 = ashr i32 %105, 24
%107 = and i32 %106, 3
%108 = add nsw i32 %104, %107
%109 = load i32*, i32** %8
%110 = getelementptr inbounds i32, i32* %109, i64 12
store i32 %108, i32* %110
%111 = load i32, i32* %4
%112 = load i32, i32* %10
%113 = ashr i32 %112, 26
%114 = and i32 %113, 3
%115 = add nsw i32 %111, %114
%116 = load i32*, i32** %8
%117 = getelementptr inbounds i32, i32* %116, i64 13
store i32 %115, i32* %117
%118 = load i32, i32* %4
%119 = load i32, i32* %10
%120 = ashr i32 %119, 28
%121 = and i32 %120, 3
%122 = add nsw i32 %118, %121
%123 = load i32*, i32** %8
%124 = getelementptr inbounds i32, i32* %123, i64 14
store i32 %122, i32* %124
%125 = load i32, i32* %4
%126 = load i32, i32* %10
%127 = ashr i32 %126, 30
%128 = and i32 %127, 3
%129 = add nsw i32 %125, %128
%130 = load i32*, i32** %8
%131 = getelementptr inbounds i32, i32* %130, i64 15
store i32 %129, i32* %131
%132 = load i32, i32* %4
%133 = load i32, i32* %10
%134 = ashr i32 %133, 32
%135 = and i32 %134, 3
%136 = add nsw i32 %132, %135
%137 = load i32*, i32** %8
%138 = getelementptr inbounds i32, i32* %137, i64 16
store i32 %136, i32* %138
%139 = load i32, i32* %4
%140 = load i32, i32* %10
%141 = ashr i32 %140, 34
%142 = and i32 %141, 3
%143 = add nsw i32 %139, %142
%144 = load i32*, i32** %8
%145 = getelementptr inbounds i32, i32* %144, i64 17
store i32 %143, i32* %145
%146 = load i32, i32* %4
%147 = load i32, i32* %10
%148 = ashr i32 %147, 36
%149 = and i32 %148, 3
%150 = add nsw i32 %146, %149
%151 = load i32*, i32** %8
%152 = getelementptr inbounds i32, i32* %151, i64 18
store i32 %150, i32* %152
%153 = load i32, i32* %4
%154 = load i32, i32* %10
%155 = ashr i32 %154, 38
%156 = and i32 %155, 3
%157 = add nsw i32 %153, %156
%158 = load i32*, i32** %8
%159 = getelementptr inbounds i32, i32* %158, i64 19
store i32 %157, i32* %159
%160 = load i32, i32* %4
%161 = load i32, i32* %10
%162 = ashr i32 %161, 40
%163 = and i32 %162, 3
%164 = add nsw i32 %160, %163
%165 = load i32*, i32** %8
%166 = getelementptr inbounds i32, i32* %165, i64 20
store i32 %164, i32* %166
%167 = load i32, i32* %4
%168 = load i32, i32* %10
%169 = ashr i32 %168, 42
%170 = and i32 %169, 3
%171 = add nsw i32 %167, %170
%172 = load i32*, i32** %8
%173 = getelementptr inbounds i32, i32* %172, i64 21
store i32 %171, i32* %173
%174 = load i32, i32* %4
%175 = load i32, i32* %10
%176 = ashr i32 %175, 44
%177 = and i32 %176, 3
%178 = add nsw i32 %174, %177
%179 = load i32*, i32** %8
%180 = getelementptr inbounds i32, i32* %179, i64 22
store i32 %178, i32* %180
%181 = load i32, i32* %4
%182 = load i32, i32* %10
%183 = ashr i32 %182, 46
%184 = and i32 %183, 3
%185 = add nsw i32 %181, %184
%186 = load i32*, i32** %8
%187 = getelementptr inbounds i32, i32* %186, i64 23
store i32 %185, i32* %187
%188 = load i32, i32* %4
%189 = load i32, i32* %10
%190 = ashr i32 %189, 48
%191 = and i32 %190, 3
%192 = add nsw i32 %188, %191
%193 = load i32*, i32** %8
%194 = getelementptr inbounds i32, i32* %193, i64 24
store i32 %192, i32* %194
%195 = load i32, i32* %4
%196 = load i32, i32* %10
%197 = ashr i32 %196, 50
%198 = and i32 %197, 3
%199 = add nsw i32 %195, %198
%200 = load i32*, i32** %8
%201 = getelementptr inbounds i32, i32* %200, i64 25
store i32 %199, i32* %201
%202 = load i32, i32* %4
%203 = load i32, i32* %10
%204 = ashr i32 %203, 52
%205 = and i32 %204, 3
%206 = add nsw i32 %202, %205
%207 = load i32*, i32** %8
%208 = getelementptr inbounds i32, i32* %207, i64 26
store i32 %206, i32* %208
%209 = load i32, i32* %4
%210 = load i32, i32* %10
%211 = ashr i32 %210, 54
%212 = and i32 %211, 3
%213 = add nsw i32 %209, %212
%214 = load i32*, i32** %8
%215 = getelementptr inbounds i32, i32* %214, i64 27
store i32 %213, i32* %215
%216 = load i32, i32* %4
%217 = load i32, i32* %10
%218 = ashr i32 %217, 56
%219 = and i32 %218, 3
%220 = add nsw i32 %216, %219
%221 = load i32*, i32** %8
%222 = getelementptr inbounds i32, i32* %221, i64 28
store i32 %220, i32* %222
%223 = load i32, i32* %4
%224 = load i32, i32* %10
%225 = ashr i32 %224, 58
%226 = and i32 %225, 3
%227 = add nsw i32 %223, %226
%228 = load i32*, i32** %8
%229 = getelementptr inbounds i32, i32* %228, i64 29
store i32 %227, i32* %229
%230 = load i32, i32* %4
%231 = load i32, i32* %10
%232 = ashr i32 %231, 60
%233 = and i32 %232, 3
%234 = add nsw i32 %230, %233
%235 = load i32*, i32** %8
%236 = getelementptr inbounds i32, i32* %235, i64 30
store i32 %234, i32* %236
%237 = load i32, i32* %4
%238 = load i32, i32* %10
%239 = ashr i32 %238, 62
%240 = add nsw i32 %237, %239
%241 = load i32*, i32** %8
%242 = getelementptr inbounds i32, i32* %241, i64 31
store i32 %240, i32* %242
%243 = load i32**, i32*** %6
%244 = load i32*, i32** %243
%245 = getelementptr inbounds i32, i32* %244, i64 32
store i32* %245, i32** %243
ret void
}

LLVM IR (-O2):
define void @unpackforblock2_64(i32 %0, i32** nocapture %1, i32** nocapture %2) {
%4 = load i32*, i32** %1
%5 = load i32*, i32** %2
%6 = load i32, i32* %4
%7 = getelementptr inbounds i32, i32* %4, i64 8
store i32* %7, i32** %1
%8 = lshr i32 %6, 2
%9 = lshr i32 %6, 4
%10 = lshr i32 %6, 6
%11 = insertelement <4 x i32> poison, i32 %6, i64 0
%12 = insertelement <4 x i32> %11, i32 %8, i64 1
%13 = insertelement <4 x i32> %12, i32 %9, i64 2
%14 = insertelement <4 x i32> %13, i32 %10, i64 3
%15 = and <4 x i32> %14, <i32 3, i32 3, i32 3, i32 3>
%16 = insertelement <4 x i32> poison, i32 %0, i64 0
%17 = shufflevector <4 x i32> %16, <4 x i32> poison, <4 x i32> zeroinitializer
%18 = add nsw <4 x i32> %15, %17
%19 = bitcast i32* %5 to <4 x i32>*
store <4 x i32> %18, <4 x i32>* %19
%20 = lshr i32 %6, 8
%21 = and i32 %20, 3
%22 = add nsw i32 %21, %0
%23 = getelementptr inbounds i32, i32* %5, i64 4
store i32 %22, i32* %23
%24 = lshr i32 %6, 10
%25 = and i32 %24, 3
%26 = add nsw i32 %25, %0
%27 = getelementptr inbounds i32, i32* %5, i64 5
store i32 %26, i32* %27
%28 = lshr i32 %6, 12
%29 = and i32 %28, 3
%30 = add nsw i32 %29, %0
%31 = getelementptr inbounds i32, i32* %5, i64 6
store i32 %30, i32* %31
%32 = lshr i32 %6, 14
%33 = and i32 %32, 3
%34 = add nsw i32 %33, %0
%35 = getelementptr inbounds i32, i32* %5, i64 7
store i32 %34, i32* %35
%36 = lshr i32 %6, 16
%37 = and i32 %36, 3
%38 = add nsw i32 %37, %0
%39 = getelementptr inbounds i32, i32* %5, i64 8
store i32 %38, i32* %39
%40 = lshr i32 %6, 18
%41 = and i32 %40, 3
%42 = add nsw i32 %41, %0
%43 = getelementptr inbounds i32, i32* %5, i64 9
store i32 %42, i32* %43
%44 = lshr i32 %6, 20
%45 = and i32 %44, 3
%46 = add nsw i32 %45, %0
%47 = getelementptr inbounds i32, i32* %5, i64 10
store i32 %46, i32* %47
%48 = lshr i32 %6, 22
%49 = and i32 %48, 3
%50 = add nsw i32 %49, %0
%51 = getelementptr inbounds i32, i32* %5, i64 11
store i32 %50, i32* %51
%52 = lshr i32 %6, 24
%53 = and i32 %52, 3
%54 = add nsw i32 %53, %0
%55 = getelementptr inbounds i32, i32* %5, i64 12
store i32 %54, i32* %55
%56 = lshr i32 %6, 26
%57 = and i32 %56, 3
%58 = add nsw i32 %57, %0
%59 = getelementptr inbounds i32, i32* %5, i64 13
store i32 %58, i32* %59
%60 = lshr i32 %6, 28
%61 = and i32 %60, 3
%62 = add nsw i32 %61, %0
%63 = getelementptr inbounds i32, i32* %5, i64 14
store i32 %62, i32* %63
%64 = lshr i32 %6, 30
%65 = add nsw i32 %64, %0
%66 = getelementptr inbounds i32, i32* %5, i64 15
store i32 %65, i32* %66
%67 = load i32*, i32** %2
%68 = getelementptr inbounds i32, i32* %67, i64 32
store i32* %68, i32** %2
ret void
}