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llvm-project/llvm/test/CodeGen/AArch64/arm64-atomic.ll

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; RUN: llc < %s -mtriple=arm64-eabi -asm-verbose=false -verify-machineinstrs -mcpu=cyclone | FileCheck %s
define i32 @val_compare_and_swap(i32* %p, i32 %cmp, i32 %new) #0 {
; CHECK-LABEL: val_compare_and_swap:
; CHECK-NEXT: mov x[[ADDR:[0-9]+]], x0
; CHECK-NEXT: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK-NEXT: ldaxr [[RESULT:w[0-9]+]], [x[[ADDR]]]
; CHECK-NEXT: cmp [[RESULT]], w1
; CHECK-NEXT: b.ne [[FAILBB:.?LBB[0-9_]+]]
; CHECK-NEXT: stxr [[SCRATCH_REG:w[0-9]+]], w2, [x[[ADDR]]]
; CHECK-NEXT: cbnz [[SCRATCH_REG]], [[TRYBB]]
; CHECK-NEXT: b [[EXITBB:.?LBB[0-9_]+]]
; CHECK-NEXT: [[FAILBB]]:
; CHECK-NEXT: clrex
; CHECK-NEXT: [[EXITBB]]:
%pair = cmpxchg i32* %p, i32 %cmp, i32 %new acquire acquire
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
define i32 @val_compare_and_swap_from_load(i32* %p, i32 %cmp, i32* %pnew) #0 {
; CHECK-LABEL: val_compare_and_swap_from_load:
; CHECK-NEXT: ldr [[NEW:w[0-9]+]], [x2]
; CHECK-NEXT: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK-NEXT: ldaxr [[RESULT:w[0-9]+]], [x0]
; CHECK-NEXT: cmp [[RESULT]], w1
; CHECK-NEXT: b.ne [[FAILBB:.?LBB[0-9_]+]]
; CHECK-NEXT: stxr [[SCRATCH_REG:w[0-9]+]], [[NEW]], [x0]
; CHECK-NEXT: cbnz [[SCRATCH_REG]], [[TRYBB]]
; CHECK-NEXT: b [[EXITBB:.?LBB[0-9_]+]]
; CHECK-NEXT: [[FAILBB]]:
; CHECK-NEXT: clrex
; CHECK-NEXT: [[EXITBB]]:
%new = load i32, i32* %pnew
%pair = cmpxchg i32* %p, i32 %cmp, i32 %new acquire acquire
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
define i32 @val_compare_and_swap_rel(i32* %p, i32 %cmp, i32 %new) #0 {
; CHECK-LABEL: val_compare_and_swap_rel:
; CHECK-NEXT: mov x[[ADDR:[0-9]+]], x0
; CHECK-NEXT: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK-NEXT: ldaxr [[RESULT:w[0-9]+]], [x[[ADDR]]
; CHECK-NEXT: cmp [[RESULT]], w1
; CHECK-NEXT: b.ne [[FAILBB:.?LBB[0-9_]+]]
; CHECK-NEXT: stlxr [[SCRATCH_REG:w[0-9]+]], w2, [x[[ADDR]]
; CHECK-NEXT: cbnz [[SCRATCH_REG]], [[TRYBB]]
; CHECK-NEXT: b [[EXITBB:.?LBB[0-9_]+]]
; CHECK-NEXT: [[FAILBB]]:
; CHECK-NEXT: clrex
; CHECK-NEXT: [[EXITBB]]:
%pair = cmpxchg i32* %p, i32 %cmp, i32 %new acq_rel monotonic
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
define i64 @val_compare_and_swap_64(i64* %p, i64 %cmp, i64 %new) #0 {
; CHECK-LABEL: val_compare_and_swap_64:
; CHECK-NEXT: mov x[[ADDR:[0-9]+]], x0
; CHECK-NEXT: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK-NEXT: ldxr [[RESULT:x[0-9]+]], [x[[ADDR]]]
; CHECK-NEXT: cmp [[RESULT]], x1
; CHECK-NEXT: b.ne [[FAILBB:.?LBB[0-9_]+]]
; CHECK-NEXT: stxr [[SCRATCH_REG:w[0-9]+]], x2, [x[[ADDR]]]
; CHECK-NEXT: cbnz [[SCRATCH_REG]], [[TRYBB]]
; CHECK-NEXT: b [[EXITBB:.?LBB[0-9_]+]]
; CHECK-NEXT: [[FAILBB]]:
; CHECK-NEXT: clrex
; CHECK-NEXT: [[EXITBB]]:
%pair = cmpxchg i64* %p, i64 %cmp, i64 %new monotonic monotonic
%val = extractvalue { i64, i1 } %pair, 0
ret i64 %val
}
define i32 @fetch_and_nand(i32* %p) #0 {
; CHECK-LABEL: fetch_and_nand:
; CHECK: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK: ldxr w[[DEST_REG:[0-9]+]], [x0]
; CHECK: mvn [[TMP_REG:w[0-9]+]], w[[DEST_REG]]
; CHECK: orr [[SCRATCH2_REG:w[0-9]+]], [[TMP_REG]], #0xfffffff8
; CHECK-NOT: stlxr [[SCRATCH2_REG]], [[SCRATCH2_REG]]
; CHECK: stlxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x0]
; CHECK: cbnz [[SCRATCH_REG]], [[TRYBB]]
; CHECK: mov x0, x[[DEST_REG]]
%val = atomicrmw nand i32* %p, i32 7 release
ret i32 %val
}
define i64 @fetch_and_nand_64(i64* %p) #0 {
; CHECK-LABEL: fetch_and_nand_64:
; CHECK: mov x[[ADDR:[0-9]+]], x0
; CHECK: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK: ldaxr x[[DEST_REG:[0-9]+]], [x[[ADDR]]]
; CHECK: mvn w[[TMP_REG:[0-9]+]], w[[DEST_REG]]
; CHECK: orr [[SCRATCH2_REG:x[0-9]+]], x[[TMP_REG]], #0xfffffffffffffff8
; CHECK: stlxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x[[ADDR]]]
; CHECK: cbnz [[SCRATCH_REG]], [[TRYBB]]
%val = atomicrmw nand i64* %p, i64 7 acq_rel
ret i64 %val
}
define i32 @fetch_and_or(i32* %p) #0 {
; CHECK-LABEL: fetch_and_or:
; CHECK: mov [[OLDVAL_REG:w[0-9]+]], #5
; CHECK: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK: ldaxr w[[DEST_REG:[0-9]+]], [x0]
; CHECK: orr [[SCRATCH2_REG:w[0-9]+]], w[[DEST_REG]], [[OLDVAL_REG]]
; CHECK-NOT: stlxr [[SCRATCH2_REG]], [[SCRATCH2_REG]]
; CHECK: stlxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x0]
; CHECK: cbnz [[SCRATCH_REG]], [[TRYBB]]
; CHECK: mov x0, x[[DEST_REG]]
%val = atomicrmw or i32* %p, i32 5 seq_cst
ret i32 %val
}
define i64 @fetch_and_or_64(i64* %p) #0 {
; CHECK: fetch_and_or_64:
; CHECK: mov x[[ADDR:[0-9]+]], x0
; CHECK: [[TRYBB:.?LBB[0-9_]+]]:
; CHECK: ldxr [[DEST_REG:x[0-9]+]], [x[[ADDR]]]
; CHECK: orr [[SCRATCH2_REG:x[0-9]+]], [[DEST_REG]], #0x7
; CHECK: stxr [[SCRATCH_REG:w[0-9]+]], [[SCRATCH2_REG]], [x[[ADDR]]]
; CHECK: cbnz [[SCRATCH_REG]], [[TRYBB]]
%val = atomicrmw or i64* %p, i64 7 monotonic
ret i64 %val
}
define void @acquire_fence() #0 {
fence acquire
ret void
; CHECK-LABEL: acquire_fence:
; CHECK: dmb ishld
}
define void @release_fence() #0 {
fence release
ret void
; CHECK-LABEL: release_fence:
; CHECK: dmb ish{{$}}
}
define void @seq_cst_fence() #0 {
fence seq_cst
ret void
; CHECK-LABEL: seq_cst_fence:
; CHECK: dmb ish{{$}}
}
define i32 @atomic_load(i32* %p) #0 {
%r = load atomic i32, i32* %p seq_cst, align 4
ret i32 %r
; CHECK-LABEL: atomic_load:
; CHECK: ldar
}
define i8 @atomic_load_relaxed_8(i8* %p, i32 %off32) #0 {
; CHECK-LABEL: atomic_load_relaxed_8:
%ptr_unsigned = getelementptr i8, i8* %p, i32 4095
%val_unsigned = load atomic i8, i8* %ptr_unsigned monotonic, align 1
; CHECK: ldrb {{w[0-9]+}}, [x0, #4095]
%ptr_regoff = getelementptr i8, i8* %p, i32 %off32
%val_regoff = load atomic i8, i8* %ptr_regoff unordered, align 1
%tot1 = add i8 %val_unsigned, %val_regoff
; CHECK: ldrb {{w[0-9]+}}, [x0, w1, sxtw]
%ptr_unscaled = getelementptr i8, i8* %p, i32 -256
%val_unscaled = load atomic i8, i8* %ptr_unscaled monotonic, align 1
%tot2 = add i8 %tot1, %val_unscaled
; CHECK: ldurb {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i8, i8* %p, i32 1191936 ; 0x123000 (i.e. ADD imm)
%val_random = load atomic i8, i8* %ptr_random unordered, align 1
%tot3 = add i8 %tot2, %val_random
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: ldrb {{w[0-9]+}}, [x[[ADDR]]]
ret i8 %tot3
}
define i16 @atomic_load_relaxed_16(i16* %p, i32 %off32) #0 {
; CHECK-LABEL: atomic_load_relaxed_16:
%ptr_unsigned = getelementptr i16, i16* %p, i32 4095
%val_unsigned = load atomic i16, i16* %ptr_unsigned monotonic, align 2
; CHECK: ldrh {{w[0-9]+}}, [x0, #8190]
%ptr_regoff = getelementptr i16, i16* %p, i32 %off32
%val_regoff = load atomic i16, i16* %ptr_regoff unordered, align 2
%tot1 = add i16 %val_unsigned, %val_regoff
; CHECK: ldrh {{w[0-9]+}}, [x0, w1, sxtw #1]
%ptr_unscaled = getelementptr i16, i16* %p, i32 -128
%val_unscaled = load atomic i16, i16* %ptr_unscaled monotonic, align 2
%tot2 = add i16 %tot1, %val_unscaled
; CHECK: ldurh {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i16, i16* %p, i32 595968 ; 0x123000/2 (i.e. ADD imm)
%val_random = load atomic i16, i16* %ptr_random unordered, align 2
%tot3 = add i16 %tot2, %val_random
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: ldrh {{w[0-9]+}}, [x[[ADDR]]]
ret i16 %tot3
}
define i32 @atomic_load_relaxed_32(i32* %p, i32 %off32) #0 {
; CHECK-LABEL: atomic_load_relaxed_32:
%ptr_unsigned = getelementptr i32, i32* %p, i32 4095
%val_unsigned = load atomic i32, i32* %ptr_unsigned monotonic, align 4
; CHECK: ldr {{w[0-9]+}}, [x0, #16380]
%ptr_regoff = getelementptr i32, i32* %p, i32 %off32
%val_regoff = load atomic i32, i32* %ptr_regoff unordered, align 4
%tot1 = add i32 %val_unsigned, %val_regoff
; CHECK: ldr {{w[0-9]+}}, [x0, w1, sxtw #2]
%ptr_unscaled = getelementptr i32, i32* %p, i32 -64
%val_unscaled = load atomic i32, i32* %ptr_unscaled monotonic, align 4
%tot2 = add i32 %tot1, %val_unscaled
; CHECK: ldur {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i32, i32* %p, i32 297984 ; 0x123000/4 (i.e. ADD imm)
%val_random = load atomic i32, i32* %ptr_random unordered, align 4
%tot3 = add i32 %tot2, %val_random
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: ldr {{w[0-9]+}}, [x[[ADDR]]]
ret i32 %tot3
}
define i64 @atomic_load_relaxed_64(i64* %p, i32 %off32) #0 {
; CHECK-LABEL: atomic_load_relaxed_64:
%ptr_unsigned = getelementptr i64, i64* %p, i32 4095
%val_unsigned = load atomic i64, i64* %ptr_unsigned monotonic, align 8
; CHECK: ldr {{x[0-9]+}}, [x0, #32760]
%ptr_regoff = getelementptr i64, i64* %p, i32 %off32
%val_regoff = load atomic i64, i64* %ptr_regoff unordered, align 8
%tot1 = add i64 %val_unsigned, %val_regoff
; CHECK: ldr {{x[0-9]+}}, [x0, w1, sxtw #3]
%ptr_unscaled = getelementptr i64, i64* %p, i32 -32
%val_unscaled = load atomic i64, i64* %ptr_unscaled monotonic, align 8
%tot2 = add i64 %tot1, %val_unscaled
; CHECK: ldur {{x[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i64, i64* %p, i32 148992 ; 0x123000/8 (i.e. ADD imm)
%val_random = load atomic i64, i64* %ptr_random unordered, align 8
%tot3 = add i64 %tot2, %val_random
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: ldr {{x[0-9]+}}, [x[[ADDR]]]
ret i64 %tot3
}
define void @atomc_store(i32* %p) #0 {
store atomic i32 4, i32* %p seq_cst, align 4
ret void
; CHECK-LABEL: atomc_store:
; CHECK: stlr
}
define void @atomic_store_relaxed_8(i8* %p, i32 %off32, i8 %val) #0 {
; CHECK-LABEL: atomic_store_relaxed_8:
%ptr_unsigned = getelementptr i8, i8* %p, i32 4095
store atomic i8 %val, i8* %ptr_unsigned monotonic, align 1
; CHECK: strb {{w[0-9]+}}, [x0, #4095]
%ptr_regoff = getelementptr i8, i8* %p, i32 %off32
store atomic i8 %val, i8* %ptr_regoff unordered, align 1
; CHECK: strb {{w[0-9]+}}, [x0, w1, sxtw]
%ptr_unscaled = getelementptr i8, i8* %p, i32 -256
store atomic i8 %val, i8* %ptr_unscaled monotonic, align 1
; CHECK: sturb {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i8, i8* %p, i32 1191936 ; 0x123000 (i.e. ADD imm)
store atomic i8 %val, i8* %ptr_random unordered, align 1
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: strb {{w[0-9]+}}, [x[[ADDR]]]
ret void
}
define void @atomic_store_relaxed_16(i16* %p, i32 %off32, i16 %val) #0 {
; CHECK-LABEL: atomic_store_relaxed_16:
%ptr_unsigned = getelementptr i16, i16* %p, i32 4095
store atomic i16 %val, i16* %ptr_unsigned monotonic, align 2
; CHECK: strh {{w[0-9]+}}, [x0, #8190]
%ptr_regoff = getelementptr i16, i16* %p, i32 %off32
store atomic i16 %val, i16* %ptr_regoff unordered, align 2
; CHECK: strh {{w[0-9]+}}, [x0, w1, sxtw #1]
%ptr_unscaled = getelementptr i16, i16* %p, i32 -128
store atomic i16 %val, i16* %ptr_unscaled monotonic, align 2
; CHECK: sturh {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i16, i16* %p, i32 595968 ; 0x123000/2 (i.e. ADD imm)
store atomic i16 %val, i16* %ptr_random unordered, align 2
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: strh {{w[0-9]+}}, [x[[ADDR]]]
ret void
}
define void @atomic_store_relaxed_32(i32* %p, i32 %off32, i32 %val) #0 {
; CHECK-LABEL: atomic_store_relaxed_32:
%ptr_unsigned = getelementptr i32, i32* %p, i32 4095
store atomic i32 %val, i32* %ptr_unsigned monotonic, align 4
; CHECK: str {{w[0-9]+}}, [x0, #16380]
%ptr_regoff = getelementptr i32, i32* %p, i32 %off32
store atomic i32 %val, i32* %ptr_regoff unordered, align 4
; CHECK: str {{w[0-9]+}}, [x0, w1, sxtw #2]
%ptr_unscaled = getelementptr i32, i32* %p, i32 -64
store atomic i32 %val, i32* %ptr_unscaled monotonic, align 4
; CHECK: stur {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i32, i32* %p, i32 297984 ; 0x123000/4 (i.e. ADD imm)
store atomic i32 %val, i32* %ptr_random unordered, align 4
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: str {{w[0-9]+}}, [x[[ADDR]]]
ret void
}
define void @atomic_store_relaxed_64(i64* %p, i32 %off32, i64 %val) #0 {
; CHECK-LABEL: atomic_store_relaxed_64:
%ptr_unsigned = getelementptr i64, i64* %p, i32 4095
store atomic i64 %val, i64* %ptr_unsigned monotonic, align 8
; CHECK: str {{x[0-9]+}}, [x0, #32760]
%ptr_regoff = getelementptr i64, i64* %p, i32 %off32
store atomic i64 %val, i64* %ptr_regoff unordered, align 8
; CHECK: str {{x[0-9]+}}, [x0, w1, sxtw #3]
%ptr_unscaled = getelementptr i64, i64* %p, i32 -32
store atomic i64 %val, i64* %ptr_unscaled monotonic, align 8
; CHECK: stur {{x[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i64, i64* %p, i32 148992 ; 0x123000/8 (i.e. ADD imm)
store atomic i64 %val, i64* %ptr_random unordered, align 8
; CHECK: add x[[ADDR:[0-9]+]], x0, #291, lsl #12
; CHECK: str {{x[0-9]+}}, [x[[ADDR]]]
ret void
}
; rdar://11531169
; rdar://11531308
%"class.X::Atomic" = type { %struct.x_atomic_t }
%struct.x_atomic_t = type { i32 }
@counter = external hidden global %"class.X::Atomic", align 4
define i32 @next_id() nounwind optsize ssp align 2 {
entry:
%0 = atomicrmw add i32* getelementptr inbounds (%"class.X::Atomic", %"class.X::Atomic"* @counter, i64 0, i32 0, i32 0), i32 1 seq_cst
%add.i = add i32 %0, 1
%tobool = icmp eq i32 %add.i, 0
br i1 %tobool, label %if.else, label %return
if.else: ; preds = %entry
%1 = atomicrmw add i32* getelementptr inbounds (%"class.X::Atomic", %"class.X::Atomic"* @counter, i64 0, i32 0, i32 0), i32 1 seq_cst
%add.i2 = add i32 %1, 1
br label %return
return: ; preds = %if.else, %entry
%retval.0 = phi i32 [ %add.i2, %if.else ], [ %add.i, %entry ]
ret i32 %retval.0
}
attributes #0 = { nounwind }
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