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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown -mcpu=core-avx2 | FileCheck %s
define i1 @try_cmpxchg(i128* %addr, i128 %desired, i128 %new) {
; CHECK-LABEL: try_cmpxchg:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset %rbx, -16
; CHECK-NEXT: movq %rcx, %rbx
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: movq %r8, %rcx
; CHECK-NEXT: lock cmpxchg16b (%rdi)
; CHECK-NEXT: sete %al
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
%success = extractvalue { i128, i1 } %pair, 1
ret i1 %success
}
define void @cmpxchg_flow(i128* %addr, i128 %desired, i128 %new) {
; CHECK-LABEL: cmpxchg_flow:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset %rbx, -16
; CHECK-NEXT: movq %rcx, %rbx
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: movq %r8, %rcx
; CHECK-NEXT: lock cmpxchg16b (%rdi)
; CHECK-NEXT: jne .LBB1_2
; CHECK-NEXT: # %bb.1: # %true
; CHECK-NEXT: callq foo@PLT
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB1_2: # %false
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: callq bar@PLT
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
%success = extractvalue { i128, i1 } %pair, 1
br i1 %success, label %true, label %false
true:
call void @foo()
ret void
false:
call void @bar()
ret void
}
; Can't use the flags here because cmpxchg16b only sets ZF.
define i1 @cmpxchg_arithcmp(i128* %addr, i128 %desired, i128 %new) {
; CHECK-LABEL: cmpxchg_arithcmp:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset %rbx, -16
; CHECK-NEXT: movq %rcx, %rbx
; CHECK-NEXT: movq %rdx, %r9
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: movq %r8, %rcx
; CHECK-NEXT: lock cmpxchg16b (%rdi)
; CHECK-NEXT: cmpq %rsi, %rax
; CHECK-NEXT: sbbq %r9, %rdx
; CHECK-NEXT: setge %al
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
%oldval = extractvalue { i128, i1 } %pair, 0
%success = icmp sge i128 %oldval, %desired
ret i1 %success
}
define i128 @cmpxchg_zext(i128* %addr, i128 %desired, i128 %new) {
; CHECK-LABEL: cmpxchg_zext:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset %rbx, -16
; CHECK-NEXT: movq %rcx, %rbx
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: xorl %esi, %esi
; CHECK-NEXT: movq %r8, %rcx
; CHECK-NEXT: lock cmpxchg16b (%rdi)
; CHECK-NEXT: sete %sil
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: xorl %edx, %edx
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
%pair = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst
%success = extractvalue { i128, i1 } %pair, 1
%mask = zext i1 %success to i128
ret i128 %mask
}
define i128 @cmpxchg_use_eflags_and_val(i128* %addr, i128 %offset) {
; CHECK-LABEL: cmpxchg_use_eflags_and_val:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset %rbx, -16
; CHECK-NEXT: movq %rdx, %r8
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: xorl %edx, %edx
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: xorl %ebx, %ebx
; CHECK-NEXT: lock cmpxchg16b (%rdi)
; CHECK-NEXT: .p2align 4, 0x90
; CHECK-NEXT: .LBB4_1: # %loop
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: movq %rdx, %r9
; CHECK-NEXT: movq %rax, %r10
; CHECK-NEXT: movq %rax, %rbx
; CHECK-NEXT: addq %rsi, %rbx
; CHECK-NEXT: movq %rdx, %rcx
; CHECK-NEXT: adcq %r8, %rcx
; CHECK-NEXT: lock cmpxchg16b (%rdi)
; CHECK-NEXT: jne .LBB4_1
; CHECK-NEXT: # %bb.2: # %done
; CHECK-NEXT: movq %r10, %rax
; CHECK-NEXT: movq %r9, %rdx
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
entry:
%init = load atomic i128, i128* %addr seq_cst, align 16
br label %loop
loop:
%old = phi i128 [%init, %entry], [%oldval, %loop]
%new = add i128 %old, %offset
%pair = cmpxchg i128* %addr, i128 %old, i128 %new seq_cst seq_cst
%oldval = extractvalue { i128, i1 } %pair, 0
%success = extractvalue { i128, i1 } %pair, 1
br i1 %success, label %done, label %loop
done:
ret i128 %old
}
declare void @foo()
declare void @bar()
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