llvm-for-llvmta/test/CodeGen/X86/stack-folding-bmi.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -O3 -disable-peephole -mtriple=x86_64-unknown-unknown -mattr=+bmi < %s | FileCheck %s

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-unknown"

; Stack reload folding tests.
;
; By including a nop call with sideeffects we can force a partial register spill of the
; relevant registers and check that the reload is correctly folded into the instruction.

define i32 @stack_fold_andn_u32(i32 %a0, i32 %a1) {
; CHECK-LABEL: stack_fold_andn_u32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movl %esi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    movl %edi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    movl {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Reload
; CHECK-NEXT:    andnl {{[-0-9]+}}(%r{{[sb]}}p), %eax, %eax # 4-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = xor i32 %a0, -1
  %3 = and i32 %a1, %2
  ret i32 %3
}

define i64 @stack_fold_andn_u64(i64 %a0, i64 %a1) {
; CHECK-LABEL: stack_fold_andn_u64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movq %rsi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    movq {{[-0-9]+}}(%r{{[sb]}}p), %rax # 8-byte Reload
; CHECK-NEXT:    andnq {{[-0-9]+}}(%r{{[sb]}}p), %rax, %rax # 8-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = xor i64 %a0, -1
  %3 = and i64 %a1, %2
  ret i64 %3
}

define i32 @stack_fold_bextr_u32(i32 %a0, i32 %a1) {
; CHECK-LABEL: stack_fold_bextr_u32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movl %esi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    movl %edi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    movl {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Reload
; CHECK-NEXT:    bextrl %eax, {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = tail call i32 @llvm.x86.bmi.bextr.32(i32 %a0, i32 %a1)
  ret i32 %2
}
declare i32 @llvm.x86.bmi.bextr.32(i32, i32)

define i64 @stack_fold_bextr_u64(i64 %a0, i64 %a1) {
; CHECK-LABEL: stack_fold_bextr_u64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movq %rsi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    movq {{[-0-9]+}}(%r{{[sb]}}p), %rax # 8-byte Reload
; CHECK-NEXT:    bextrq %rax, {{[-0-9]+}}(%r{{[sb]}}p), %rax # 8-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = tail call i64 @llvm.x86.bmi.bextr.64(i64 %a0, i64 %a1)
  ret i64 %2
}
declare i64 @llvm.x86.bmi.bextr.64(i64, i64)

define i32 @stack_fold_blsi_u32(i32 %a0) {
; CHECK-LABEL: stack_fold_blsi_u32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movl %edi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    blsil {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = sub i32 0, %a0
  %3 = and i32 %2, %a0
  ret i32 %3
}

define i64 @stack_fold_blsi_u64(i64 %a0) {
; CHECK-LABEL: stack_fold_blsi_u64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    blsiq {{[-0-9]+}}(%r{{[sb]}}p), %rax # 8-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = sub i64 0, %a0
  %3 = and i64 %2, %a0
  ret i64 %3
}

define i32 @stack_fold_blsmsk_u32(i32 %a0) {
; CHECK-LABEL: stack_fold_blsmsk_u32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movl %edi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    blsmskl {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = sub i32 %a0, 1
  %3 = xor i32 %2, %a0
  ret i32 %3
}

define i64 @stack_fold_blsmsk_u64(i64 %a0) {
; CHECK-LABEL: stack_fold_blsmsk_u64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    blsmskq {{[-0-9]+}}(%r{{[sb]}}p), %rax # 8-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = sub i64 %a0, 1
  %3 = xor i64 %2, %a0
  ret i64 %3
}

define i32 @stack_fold_blsr_u32(i32 %a0) {
; CHECK-LABEL: stack_fold_blsr_u32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movl %edi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    blsrl {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = sub i32 %a0, 1
  %3 = and i32 %2, %a0
  ret i32 %3
}

define i64 @stack_fold_blsr_u64(i64 %a0) {
; CHECK-LABEL: stack_fold_blsr_u64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    blsrq {{[-0-9]+}}(%r{{[sb]}}p), %rax # 8-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = sub i64 %a0, 1
  %3 = and i64 %2, %a0
  ret i64 %3
}

;TODO stack_fold_tzcnt_u16

define i32 @stack_fold_tzcnt_u32(i32 %a0) {
; CHECK-LABEL: stack_fold_tzcnt_u32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movl %edi, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    tzcntl {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = tail call i32 @llvm.cttz.i32(i32 %a0, i1 0)
  ret i32 %2
}
declare i32 @llvm.cttz.i32(i32, i1)

define i64 @stack_fold_tzcnt_u64(i64 %a0) {
; CHECK-LABEL: stack_fold_tzcnt_u64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    pushq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    pushq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    pushq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    pushq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    pushq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 56
; CHECK-NEXT:    .cfi_offset %rbx, -56
; CHECK-NEXT:    .cfi_offset %r12, -48
; CHECK-NEXT:    .cfi_offset %r13, -40
; CHECK-NEXT:    .cfi_offset %r14, -32
; CHECK-NEXT:    .cfi_offset %r15, -24
; CHECK-NEXT:    .cfi_offset %rbp, -16
; CHECK-NEXT:    movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; CHECK-NEXT:    #APP
; CHECK-NEXT:    nop
; CHECK-NEXT:    #NO_APP
; CHECK-NEXT:    tzcntq {{[-0-9]+}}(%r{{[sb]}}p), %rax # 8-byte Folded Reload
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    popq %r12
; CHECK-NEXT:    .cfi_def_cfa_offset 40
; CHECK-NEXT:    popq %r13
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    popq %r14
; CHECK-NEXT:    .cfi_def_cfa_offset 24
; CHECK-NEXT:    popq %r15
; CHECK-NEXT:    .cfi_def_cfa_offset 16
; CHECK-NEXT:    popq %rbp
; CHECK-NEXT:    .cfi_def_cfa_offset 8
; CHECK-NEXT:    retq
  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
  %2 = tail call i64 @llvm.cttz.i64(i64 %a0, i1 0)
  ret i64 %2
}
declare i64 @llvm.cttz.i64(i64, i1)