| ; RUN: opt -functionattrs -S < %s | FileCheck %s --check-prefix=FNATTR |
| ; RUN: opt -attributor -attributor-manifest-internal -attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefix=ATTRIBUTOR |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| ; Test cases designed for the nosync function attribute. |
| ; FIXME's are used to indicate problems and missing attributes. |
| |
| ; struct RT { |
| ; char A; |
| ; int B[10][20]; |
| ; char C; |
| ; }; |
| ; struct ST { |
| ; int X; |
| ; double Y; |
| ; struct RT Z; |
| ; }; |
| ; |
| ; int *foo(struct ST *s) { |
| ; return &s[1].Z.B[5][13]; |
| ; } |
| |
| ; TEST 1 |
| ; non-convergent and readnone implies nosync |
| %struct.RT = type { i8, [10 x [20 x i32]], i8 } |
| %struct.ST = type { i32, double, %struct.RT } |
| |
| ; FNATTR: Function Attrs: norecurse nounwind optsize readnone ssp uwtable |
| ; FNATTR-NEXT: define nonnull i32* @foo(%struct.ST* readnone %s) |
| ; ATTRIBUTOR: Function Attrs: nofree nosync nounwind optsize readnone ssp uwtable |
| ; ATTRIBUTOR-NEXT: define nonnull i32* @foo(%struct.ST* readnone "no-capture-maybe-returned" %s) |
| define i32* @foo(%struct.ST* %s) nounwind uwtable readnone optsize ssp { |
| entry: |
| %arrayidx = getelementptr inbounds %struct.ST, %struct.ST* %s, i64 1, i32 2, i32 1, i64 5, i64 13 |
| ret i32* %arrayidx |
| } |
| |
| ; TEST 2 |
| ; atomic load with monotonic ordering |
| ; int load_monotonic(_Atomic int *num) { |
| ; int n = atomic_load_explicit(num, memory_order_relaxed); |
| ; return n; |
| ; } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind uwtable |
| ; FNATTR-NEXT: define i32 @load_monotonic(i32* nocapture readonly %0) |
| ; ATTRIBUTOR: Function Attrs: nofree norecurse nosync nounwind uwtable |
| ; ATTRIBUTOR-NEXT: define i32 @load_monotonic(i32* nocapture nonnull readonly dereferenceable(4) %0) |
| define i32 @load_monotonic(i32* nocapture readonly %0) norecurse nounwind uwtable { |
| %2 = load atomic i32, i32* %0 monotonic, align 4 |
| ret i32 %2 |
| } |
| |
| |
| ; TEST 3 |
| ; atomic store with monotonic ordering. |
| ; void store_monotonic(_Atomic int *num) { |
| ; atomic_load_explicit(num, memory_order_relaxed); |
| ; } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind uwtable |
| ; FNATTR-NEXT: define void @store_monotonic(i32* nocapture %0) |
| ; ATTRIBUTOR: Function Attrs: nofree norecurse nosync nounwind uwtable |
| ; ATTRIBUTOR-NEXT: define void @store_monotonic(i32* nocapture nonnull writeonly dereferenceable(4) %0) |
| define void @store_monotonic(i32* nocapture %0) norecurse nounwind uwtable { |
| store atomic i32 10, i32* %0 monotonic, align 4 |
| ret void |
| } |
| |
| ; TEST 4 - negative, should not deduce nosync |
| ; atomic load with acquire ordering. |
| ; int load_acquire(_Atomic int *num) { |
| ; int n = atomic_load_explicit(num, memory_order_acquire); |
| ; return n; |
| ; } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind uwtable |
| ; FNATTR-NEXT: define i32 @load_acquire(i32* nocapture readonly %0) |
| ; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define i32 @load_acquire(i32* nocapture nonnull readonly dereferenceable(4) %0) |
| define i32 @load_acquire(i32* nocapture readonly %0) norecurse nounwind uwtable { |
| %2 = load atomic i32, i32* %0 acquire, align 4 |
| ret i32 %2 |
| } |
| |
| ; TEST 5 - negative, should not deduce nosync |
| ; atomic load with release ordering |
| ; void load_release(_Atomic int *num) { |
| ; atomic_store_explicit(num, 10, memory_order_release); |
| ; } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind uwtable |
| ; FNATTR-NEXT: define void @load_release(i32* nocapture %0) |
| ; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define void @load_release(i32* nocapture writeonly %0) |
| define void @load_release(i32* nocapture %0) norecurse nounwind uwtable { |
| store atomic volatile i32 10, i32* %0 release, align 4 |
| ret void |
| } |
| |
| ; TEST 6 - negative volatile, relaxed atomic |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind uwtable |
| ; FNATTR-NEXT: define void @load_volatile_release(i32* nocapture %0) |
| ; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define void @load_volatile_release(i32* nocapture writeonly %0) |
| define void @load_volatile_release(i32* nocapture %0) norecurse nounwind uwtable { |
| store atomic volatile i32 10, i32* %0 release, align 4 |
| ret void |
| } |
| |
| ; TEST 7 - negative, should not deduce nosync |
| ; volatile store. |
| ; void volatile_store(volatile int *num) { |
| ; *num = 14; |
| ; } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind uwtable |
| ; FNATTR-NEXT: define void @volatile_store(i32* %0) |
| ; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define void @volatile_store(i32* %0) |
| define void @volatile_store(i32* %0) norecurse nounwind uwtable { |
| store volatile i32 14, i32* %0, align 4 |
| ret void |
| } |
| |
| ; TEST 8 - negative, should not deduce nosync |
| ; volatile load. |
| ; int volatile_load(volatile int *num) { |
| ; int n = *num; |
| ; return n; |
| ; } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind uwtable |
| ; FNATTR-NEXT: define i32 @volatile_load(i32* %0) |
| ; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define i32 @volatile_load(i32* %0) |
| define i32 @volatile_load(i32* %0) norecurse nounwind uwtable { |
| %2 = load volatile i32, i32* %0, align 4 |
| ret i32 %2 |
| } |
| |
| ; TEST 9 |
| |
| ; FNATTR: Function Attrs: noinline nosync nounwind uwtable |
| ; FNATTR-NEXT: declare void @nosync_function() |
| ; ATTRIBUTOR: Function Attrs: noinline nosync nounwind uwtable |
| ; ATTRIBUTOR-NEXT: declare void @nosync_function() |
| declare void @nosync_function() noinline nounwind uwtable nosync |
| |
| ; FNATTR: Function Attrs: noinline nounwind uwtable |
| ; FNATTR-NEXT: define void @call_nosync_function() |
| ; ATTRIBUTOR: Function Attrs: noinline nosync nounwind uwtable |
| ; ATTRIBUTOR-next: define void @call_nosync_function() |
| define void @call_nosync_function() nounwind uwtable noinline { |
| tail call void @nosync_function() noinline nounwind uwtable |
| ret void |
| } |
| |
| ; TEST 10 - negative, should not deduce nosync |
| |
| ; FNATTR: Function Attrs: noinline nounwind uwtable |
| ; FNATTR-NEXT: declare void @might_sync() |
| ; ATTRIBUTOR: Function Attrs: noinline nounwind uwtable |
| ; ATTRIBUTOR-NEXT: declare void @might_sync() |
| declare void @might_sync() noinline nounwind uwtable |
| |
| ; FNATTR: Function Attrs: noinline nounwind uwtable |
| ; FNATTR-NEXT: define void @call_might_sync() |
| ; ATTRIBUTOR: Function Attrs: noinline nounwind uwtable |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define void @call_might_sync() |
| define void @call_might_sync() nounwind uwtable noinline { |
| tail call void @might_sync() noinline nounwind uwtable |
| ret void |
| } |
| |
| ; TEST 11 - positive, should deduce nosync |
| ; volatile operation in same scc but dead. Call volatile_load defined in TEST 8. |
| |
| ; FNATTR: Function Attrs: nofree noinline nounwind uwtable |
| ; FNATTR-NEXT: define i32 @scc1(i32* %0) |
| ; ATTRIBUTOR: Function Attrs: nofree noinline noreturn nosync nounwind readnone uwtable |
| ; ATTRIBUTOR-NEXT: define i32 @scc1(i32* nocapture readnone %0) |
| define i32 @scc1(i32* %0) noinline nounwind uwtable { |
| tail call void @scc2(i32* %0); |
| %val = tail call i32 @volatile_load(i32* %0); |
| ret i32 %val; |
| } |
| |
| ; FNATTR: Function Attrs: nofree noinline nounwind uwtable |
| ; FNATTR-NEXT: define void @scc2(i32* %0) |
| ; ATTRIBUTOR: Function Attrs: nofree noinline noreturn nosync nounwind readnone uwtable |
| ; ATTRIBUTOR-NEXT: define void @scc2(i32* nocapture readnone %0) |
| define void @scc2(i32* %0) noinline nounwind uwtable { |
| tail call i32 @scc1(i32* %0); |
| ret void; |
| } |
| |
| ; TEST 12 - fences, negative |
| ; |
| ; void foo1(int *a, std::atomic<bool> flag){ |
| ; *a = 100; |
| ; atomic_thread_fence(std::memory_order_release); |
| ; flag.store(true, std::memory_order_relaxed); |
| ; } |
| ; |
| ; void bar(int *a, std::atomic<bool> flag){ |
| ; while(!flag.load(std::memory_order_relaxed)) |
| ; ; |
| ; |
| ; atomic_thread_fence(std::memory_order_acquire); |
| ; int b = *a; |
| ; } |
| |
| %"struct.std::atomic" = type { %"struct.std::__atomic_base" } |
| %"struct.std::__atomic_base" = type { i8 } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind |
| ; FNATTR-NEXT: define void @foo1(i32* nocapture %0, %"struct.std::atomic"* nocapture %1) |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR: define void @foo1(i32* nocapture nonnull writeonly dereferenceable(4) %0, %"struct.std::atomic"* nocapture writeonly %1) |
| |
| define void @foo1(i32* %0, %"struct.std::atomic"* %1) { |
| store i32 100, i32* %0, align 4 |
| fence release |
| %3 = getelementptr inbounds %"struct.std::atomic", %"struct.std::atomic"* %1, i64 0, i32 0, i32 0 |
| store atomic i8 1, i8* %3 monotonic, align 1 |
| ret void |
| } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind |
| ; FNATTR-NEXT: define void @bar(i32* nocapture readnone %0, %"struct.std::atomic"* nocapture readonly %1) |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR: define void @bar(i32* nocapture readnone %0, %"struct.std::atomic"* nocapture readonly %1) |
| define void @bar(i32* %0, %"struct.std::atomic"* %1) { |
| %3 = getelementptr inbounds %"struct.std::atomic", %"struct.std::atomic"* %1, i64 0, i32 0, i32 0 |
| br label %4 |
| |
| 4: ; preds = %4, %2 |
| %5 = load atomic i8, i8* %3 monotonic, align 1 |
| %6 = and i8 %5, 1 |
| %7 = icmp eq i8 %6, 0 |
| br i1 %7, label %4, label %8 |
| |
| 8: ; preds = %4 |
| fence acquire |
| ret void |
| } |
| |
| ; TEST 13 - Fence syncscope("singlethread") seq_cst |
| ; FNATTR: Function Attrs: nofree norecurse nounwind |
| ; FNATTR-NEXT: define void @foo1_singlethread(i32* nocapture %0, %"struct.std::atomic"* nocapture %1) |
| ; ATTRIBUTOR: Function Attrs: nofree nosync nounwind willreturn |
| ; ATTRIBUTOR: define void @foo1_singlethread(i32* nocapture nonnull writeonly dereferenceable(4) %0, %"struct.std::atomic"* nocapture writeonly %1) |
| |
| define void @foo1_singlethread(i32* %0, %"struct.std::atomic"* %1) { |
| store i32 100, i32* %0, align 4 |
| fence syncscope("singlethread") release |
| %3 = getelementptr inbounds %"struct.std::atomic", %"struct.std::atomic"* %1, i64 0, i32 0, i32 0 |
| store atomic i8 1, i8* %3 monotonic, align 1 |
| ret void |
| } |
| |
| ; FNATTR: Function Attrs: nofree norecurse nounwind |
| ; FNATTR-NEXT: define void @bar_singlethread(i32* nocapture readnone %0, %"struct.std::atomic"* nocapture readonly %1) |
| ; ATTRIBUTOR: Function Attrs: nofree nosync nounwind |
| ; ATTRIBUTOR: define void @bar_singlethread(i32* nocapture readnone %0, %"struct.std::atomic"* nocapture readonly %1) |
| define void @bar_singlethread(i32* %0, %"struct.std::atomic"* %1) { |
| %3 = getelementptr inbounds %"struct.std::atomic", %"struct.std::atomic"* %1, i64 0, i32 0, i32 0 |
| br label %4 |
| |
| 4: ; preds = %4, %2 |
| %5 = load atomic i8, i8* %3 monotonic, align 1 |
| %6 = and i8 %5, 1 |
| %7 = icmp eq i8 %6, 0 |
| br i1 %7, label %4, label %8 |
| |
| 8: ; preds = %4 |
| fence syncscope("singlethread") acquire |
| ret void |
| } |
| |
| declare void @llvm.memcpy(i8* %dest, i8* %src, i32 %len, i1 %isvolatile) |
| declare void @llvm.memset(i8* %dest, i8 %val, i32 %len, i1 %isvolatile) |
| |
| ; TEST 14 - negative, checking volatile intrinsics. |
| |
| ; It is odd to add nocapture but a result of the llvm.memcpy nocapture. |
| ; |
| ; ATTRIBUTOR: Function Attrs: nounwind |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define i32 @memcpy_volatile(i8* nocapture writeonly %ptr1, i8* nocapture readonly %ptr2) |
| define i32 @memcpy_volatile(i8* %ptr1, i8* %ptr2) { |
| call void @llvm.memcpy(i8* %ptr1, i8* %ptr2, i32 8, i1 1) |
| ret i32 4 |
| } |
| |
| ; TEST 15 - positive, non-volatile intrinsic. |
| |
| ; It is odd to add nocapture but a result of the llvm.memset nocapture. |
| ; |
| ; ATTRIBUTOR: Function Attrs: nosync |
| ; ATTRIBUTOR-NEXT: define i32 @memset_non_volatile(i8* nocapture writeonly %ptr1, i8 %val) |
| define i32 @memset_non_volatile(i8* %ptr1, i8 %val) { |
| call void @llvm.memset(i8* %ptr1, i8 %val, i32 8, i1 0) |
| ret i32 4 |
| } |
| |
| ; TEST 16 - negative, inline assembly. |
| |
| ; ATTRIBUTOR: define i32 @inline_asm_test(i32 %x) |
| define i32 @inline_asm_test(i32 %x) { |
| call i32 asm "bswap $0", "=r,r"(i32 %x) |
| ret i32 4 |
| } |
| |
| declare void @readnone_test() convergent readnone |
| |
| ; ATTRIBUTOR: define void @convergent_readnone() |
| ; TEST 17 - negative. Convergent |
| define void @convergent_readnone(){ |
| call void @readnone_test() |
| ret void |
| } |
| |
| ; ATTRIBUTOR: Function Attrs: nounwind |
| ; ATTRIBUTOR-NEXT: declare void @llvm.x86.sse2.clflush(i8*) |
| declare void @llvm.x86.sse2.clflush(i8*) |
| @a = common global i32 0, align 4 |
| |
| ; TEST 18 - negative. Synchronizing intrinsic |
| |
| ; ATTRIBUTOR: Function Attrs: nounwind |
| ; ATTRIBUTOR-NOT: nosync |
| ; ATTRIBUTOR-NEXT: define void @i_totally_sync() |
| define void @i_totally_sync() { |
| tail call void @llvm.x86.sse2.clflush(i8* bitcast (i32* @a to i8*)) |
| ret void |
| } |
| |
| declare float @llvm.cos(float %val) readnone |
| |
| ; TEST 19 - positive, readnone & non-convergent intrinsic. |
| |
| ; ATTRIBUTOR: Function Attrs: nosync nounwind |
| ; ATTRIBUTOR-NEXT: define i32 @cos_test(float %x) |
| define i32 @cos_test(float %x) { |
| call float @llvm.cos(float %x) |
| ret i32 4 |
| } |