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llvm-mirror/test/CodeGen/AArch64/arm64-atomic.ll
Tim Northover 96e2bce418 CodeGen: it turns out that NAND is not the same thing as BIC. At all. 
We've been performing the wrong operation on ARM for "atomicrmw nand" for
years, since "a NAND b" is "~(a & b)" rather than ARM's very tempting "a & ~b".
This bled over into the generic expansion pass.

So I assume no-one has ever actually tried to do an atomic nand in the real
world. Oh well.

llvm-svn: 212443
2014-07-07 09:06:35 +00:00

336 lines
11 KiB
LLVM
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; RUN: llc < %s -march=arm64 -verify-machineinstrs -mcpu=cyclone | FileCheck %s
define i32 @val_compare_and_swap(i32* %p) {
; CHECK-LABEL: val_compare_and_swap:
; CHECK: orr [[NEWVAL_REG:w[0-9]+]], wzr, #0x4
; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
; CHECK: ldaxr [[RESULT:w[0-9]+]], [x0]
; CHECK: cmp [[RESULT]], #7
; CHECK: b.ne [[LABEL2:.?LBB[0-9]+_[0-9]+]]
; CHECK: stxr [[SCRATCH_REG:w[0-9]+]], [[NEWVAL_REG]], [x0]
; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
; CHECK: [[LABEL2]]:
%pair = cmpxchg i32* %p, i32 7, i32 4 acquire acquire
%val = extractvalue { i32, i1 } %pair, 0
ret i32 %val
}
define i64 @val_compare_and_swap_64(i64* %p) {
; CHECK-LABEL: val_compare_and_swap_64:
; CHECK: orr w[[NEWVAL_REG:[0-9]+]], wzr, #0x4
; CHECK: [[LABEL:.?LBB[0-9]+_[0-9]+]]:
; CHECK: ldxr [[RESULT:x[0-9]+]], [x0]
; CHECK: cmp [[RESULT]], #7
; CHECK: b.ne [[LABEL2:.?LBB[0-9]+_[0-9]+]]
; CHECK-NOT: stxr x[[NEWVAL_REG]], x[[NEWVAL_REG]]
; CHECK: stxr [[SCRATCH_REG:w[0-9]+]], x[[NEWVAL_REG]], [x0]
; CHECK: cbnz [[SCRATCH_REG]], [[LABEL]]
; CHECK: [[LABEL2]]:
%pair = cmpxchg i64* %p, i64 7, i64 4 monotonic monotonic
%val = extractvalue { i64, i1 } %pair, 0
ret i64 %val
}
define i32 @fetch_and_nand(i32* %p) {
; CHECK-LABEL: fetch_and_nand:
; CHECK: [[LABEL:.?LBB[0-9]+_[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]], [[LABEL]]
; 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) {
; CHECK-LABEL: fetch_and_nand_64:
; CHECK: mov x[[ADDR:[0-9]+]], x0
; CHECK: [[LABEL:.?LBB[0-9]+_[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]], [[LABEL]]
%val = atomicrmw nand i64* %p, i64 7 acq_rel
ret i64 %val
}
define i32 @fetch_and_or(i32* %p) {
; CHECK-LABEL: fetch_and_or:
; CHECK: movz [[OLDVAL_REG:w[0-9]+]], #0x5
; CHECK: [[LABEL:.?LBB[0-9]+_[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]], [[LABEL]]
; 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) {
; CHECK: fetch_and_or_64:
; CHECK: mov x[[ADDR:[0-9]+]], x0
; CHECK: [[LABEL:.?LBB[0-9]+_[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]], [[LABEL]]
%val = atomicrmw or i64* %p, i64 7 monotonic
ret i64 %val
}
define void @acquire_fence() {
fence acquire
ret void
; CHECK-LABEL: acquire_fence:
; CHECK: dmb ishld
}
define void @release_fence() {
fence release
ret void
; CHECK-LABEL: release_fence:
; CHECK: dmb ish{{$}}
}
define void @seq_cst_fence() {
fence seq_cst
ret void
; CHECK-LABEL: seq_cst_fence:
; CHECK: dmb ish{{$}}
}
define i32 @atomic_load(i32* %p) {
%r = load atomic 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) {
; CHECK-LABEL: atomic_load_relaxed_8:
%ptr_unsigned = getelementptr i8* %p, i32 4095
%val_unsigned = load atomic i8* %ptr_unsigned monotonic, align 1
; CHECK: ldrb {{w[0-9]+}}, [x0, #4095]
%ptr_regoff = getelementptr i8* %p, i32 %off32
%val_regoff = load atomic 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* %p, i32 -256
%val_unscaled = load atomic i8* %ptr_unscaled monotonic, align 1
%tot2 = add i8 %tot1, %val_unscaled
; CHECK: ldurb {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i8* %p, i32 1191936 ; 0x123000 (i.e. ADD imm)
%val_random = load atomic 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) {
; CHECK-LABEL: atomic_load_relaxed_16:
%ptr_unsigned = getelementptr i16* %p, i32 4095
%val_unsigned = load atomic i16* %ptr_unsigned monotonic, align 2
; CHECK: ldrh {{w[0-9]+}}, [x0, #8190]
%ptr_regoff = getelementptr i16* %p, i32 %off32
%val_regoff = load atomic 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* %p, i32 -128
%val_unscaled = load atomic i16* %ptr_unscaled monotonic, align 2
%tot2 = add i16 %tot1, %val_unscaled
; CHECK: ldurh {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i16* %p, i32 595968 ; 0x123000/2 (i.e. ADD imm)
%val_random = load atomic 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) {
; CHECK-LABEL: atomic_load_relaxed_32:
%ptr_unsigned = getelementptr i32* %p, i32 4095
%val_unsigned = load atomic i32* %ptr_unsigned monotonic, align 4
; CHECK: ldr {{w[0-9]+}}, [x0, #16380]
%ptr_regoff = getelementptr i32* %p, i32 %off32
%val_regoff = load atomic 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* %p, i32 -64
%val_unscaled = load atomic i32* %ptr_unscaled monotonic, align 4
%tot2 = add i32 %tot1, %val_unscaled
; CHECK: ldur {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i32* %p, i32 297984 ; 0x123000/4 (i.e. ADD imm)
%val_random = load atomic 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) {
; CHECK-LABEL: atomic_load_relaxed_64:
%ptr_unsigned = getelementptr i64* %p, i32 4095
%val_unsigned = load atomic i64* %ptr_unsigned monotonic, align 8
; CHECK: ldr {{x[0-9]+}}, [x0, #32760]
%ptr_regoff = getelementptr i64* %p, i32 %off32
%val_regoff = load atomic 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* %p, i32 -32
%val_unscaled = load atomic i64* %ptr_unscaled monotonic, align 8
%tot2 = add i64 %tot1, %val_unscaled
; CHECK: ldur {{x[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr i64* %p, i32 148992 ; 0x123000/8 (i.e. ADD imm)
%val_random = load atomic 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) {
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) {
; CHECK-LABEL: atomic_store_relaxed_8:
%ptr_unsigned = getelementptr 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* %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* %p, i32 -256
store atomic i8 %val, i8* %ptr_unscaled monotonic, align 1
; CHECK: sturb {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr 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) {
; CHECK-LABEL: atomic_store_relaxed_16:
%ptr_unsigned = getelementptr 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* %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* %p, i32 -128
store atomic i16 %val, i16* %ptr_unscaled monotonic, align 2
; CHECK: sturh {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr 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) {
; CHECK-LABEL: atomic_store_relaxed_32:
%ptr_unsigned = getelementptr 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* %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* %p, i32 -64
store atomic i32 %val, i32* %ptr_unscaled monotonic, align 4
; CHECK: stur {{w[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr 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) {
; CHECK-LABEL: atomic_store_relaxed_64:
%ptr_unsigned = getelementptr 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* %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* %p, i32 -32
store atomic i64 %val, i64* %ptr_unscaled monotonic, align 8
; CHECK: stur {{x[0-9]+}}, [x0, #-256]
%ptr_random = getelementptr 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"* @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"* @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
}
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