third_party/llvm-7.0/llvm/test/CodeGen/PowerPC/atomics.ll

; RUN: llc < %s -mtriple=powerpc-apple-darwin -verify-machineinstrs | FileCheck %s --check-prefix=CHECK --check-prefix=PPC32
; FIXME: -verify-machineinstrs currently fail on ppc64 (mismatched register/instruction).
; This is already checked for in Atomics-64.ll
; RUN: llc < %s -mtriple=powerpc64-apple-darwin | FileCheck %s --check-prefix=CHECK --check-prefix=PPC64

; FIXME: we don't currently check for the operations themselves with CHECK-NEXT,
;   because they are implemented in a very messy way with lwarx/stwcx.
;   It should be fixed soon in another patch.

; We first check loads, for all sizes from i8 to i64.
; We also vary orderings to check for barriers.
define i8 @load_i8_unordered(i8* %mem) {
; CHECK-LABEL: load_i8_unordered
; CHECK: lbz
; CHECK-NOT: sync
  %val = load atomic i8, i8* %mem unordered, align 1
  ret i8 %val
}
define i16 @load_i16_monotonic(i16* %mem) {
; CHECK-LABEL: load_i16_monotonic
; CHECK: lhz
; CHECK-NOT: sync
  %val = load atomic i16, i16* %mem monotonic, align 2
  ret i16 %val
}
define i32 @load_i32_acquire(i32* %mem) {
; CHECK-LABEL: load_i32_acquire
; CHECK: lwz [[VAL:r[0-9]+]]
  %val = load atomic i32, i32* %mem acquire, align 4
; CHECK-PPC32: lwsync
; CHECK-PPC64: cmpw [[CR:cr[0-9]+]], [[VAL]], [[VAL]]
; CHECK-PPC64: bne- [[CR]], .+4
; CHECK-PPC64: isync
  ret i32 %val
}
define i64 @load_i64_seq_cst(i64* %mem) {
; CHECK-LABEL: load_i64_seq_cst
; CHECK: sync
; PPC32: __sync_
; PPC64-NOT: __sync_
; PPC64: ld [[VAL:r[0-9]+]]
  %val = load atomic i64, i64* %mem seq_cst, align 8
; CHECK-PPC32: lwsync
; CHECK-PPC64: cmpw [[CR:cr[0-9]+]], [[VAL]], [[VAL]]
; CHECK-PPC64: bne- [[CR]], .+4
; CHECK-PPC64: isync
  ret i64 %val
}

; Stores
define void @store_i8_unordered(i8* %mem) {
; CHECK-LABEL: store_i8_unordered
; CHECK-NOT: sync
; CHECK: stb
  store atomic i8 42, i8* %mem unordered, align 1
  ret void
}
define void @store_i16_monotonic(i16* %mem) {
; CHECK-LABEL: store_i16_monotonic
; CHECK-NOT: sync
; CHECK: sth
  store atomic i16 42, i16* %mem monotonic, align 2
  ret void
}
define void @store_i32_release(i32* %mem) {
; CHECK-LABEL: store_i32_release
; CHECK: lwsync
; CHECK: stw
  store atomic i32 42, i32* %mem release, align 4
  ret void
}
define void @store_i64_seq_cst(i64* %mem) {
; CHECK-LABEL: store_i64_seq_cst
; CHECK: sync
; PPC32: __sync_
; PPC64-NOT: __sync_
; PPC64: std
  store atomic i64 42, i64* %mem seq_cst, align 8
  ret void
}

; Atomic CmpXchg
define i8 @cas_strong_i8_sc_sc(i8* %mem) {
; CHECK-LABEL: cas_strong_i8_sc_sc
; CHECK: sync
  %val = cmpxchg i8* %mem, i8 0, i8 1 seq_cst seq_cst
; CHECK: lwsync
  %loaded = extractvalue { i8, i1} %val, 0
  ret i8 %loaded
}
define i16 @cas_weak_i16_acquire_acquire(i16* %mem) {
; CHECK-LABEL: cas_weak_i16_acquire_acquire
;CHECK-NOT: sync
  %val = cmpxchg weak i16* %mem, i16 0, i16 1 acquire acquire
; CHECK: lwsync
  %loaded = extractvalue { i16, i1} %val, 0
  ret i16 %loaded
}
define i32 @cas_strong_i32_acqrel_acquire(i32* %mem) {
; CHECK-LABEL: cas_strong_i32_acqrel_acquire
; CHECK: lwsync
  %val = cmpxchg i32* %mem, i32 0, i32 1 acq_rel acquire
; CHECK: lwsync
  %loaded = extractvalue { i32, i1} %val, 0
  ret i32 %loaded
}
define i64 @cas_weak_i64_release_monotonic(i64* %mem) {
; CHECK-LABEL: cas_weak_i64_release_monotonic
; CHECK: lwsync
  %val = cmpxchg weak i64* %mem, i64 0, i64 1 release monotonic
; CHECK-NOT: [sync ]
  %loaded = extractvalue { i64, i1} %val, 0
  ret i64 %loaded
}

; AtomicRMW
define i8 @add_i8_monotonic(i8* %mem, i8 %operand) {
; CHECK-LABEL: add_i8_monotonic
; CHECK-NOT: sync
  %val = atomicrmw add i8* %mem, i8 %operand monotonic
  ret i8 %val
}
define i16 @xor_i16_seq_cst(i16* %mem, i16 %operand) {
; CHECK-LABEL: xor_i16_seq_cst
; CHECK: sync
  %val = atomicrmw xor i16* %mem, i16 %operand seq_cst
; CHECK: lwsync
  ret i16 %val
}
define i32 @xchg_i32_acq_rel(i32* %mem, i32 %operand) {
; CHECK-LABEL: xchg_i32_acq_rel
; CHECK: lwsync
  %val = atomicrmw xchg i32* %mem, i32 %operand acq_rel
; CHECK: lwsync
  ret i32 %val
}
define i64 @and_i64_release(i64* %mem, i64 %operand) {
; CHECK-LABEL: and_i64_release
; CHECK: lwsync
  %val = atomicrmw and i64* %mem, i64 %operand release
; CHECK-NOT: [sync ]
  ret i64 %val
}