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|
; RUN: opt -functionattrs -S < %s | FileCheck %s --check-prefix=FNATTR
; RUN: opt -attributor -attributor-disable=false -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* %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)
; ATTRIBUTOR: Function Attrs: nofree norecurse nosync nounwind uwtable
; ATTRIBUTOR-NEXT: define i32 @load_monotonic(i32* nocapture readonly)
define i32 @load_monotonic(i32* nocapture readonly) 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)
; ATTRIBUTOR: Function Attrs: nofree norecurse nosync nounwind uwtable
; ATTRIBUTOR-NEXT: define void @store_monotonic(i32* nocapture)
define void @store_monotonic(i32* nocapture) 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)
; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define i32 @load_acquire(i32* nocapture readonly)
define i32 @load_acquire(i32* nocapture readonly) 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)
; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define void @load_release(i32* nocapture)
define void @load_release(i32* nocapture) 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)
; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define void @load_volatile_release(i32* nocapture)
define void @load_volatile_release(i32* nocapture) 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*)
; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define void @volatile_store(i32*)
define void @volatile_store(i32*) 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*)
; ATTRIBUTOR: Function Attrs: nofree norecurse nounwind uwtable
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define i32 @volatile_load(i32*)
define i32 @volatile_load(i32*) 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 - negative, should not deduce nosync
; volatile operation in same scc. Call volatile_load defined in TEST 8.
; FNATTR: Function Attrs: nofree noinline nounwind uwtable
; FNATTR-NEXT: define i32 @scc1(i32*)
; ATTRIBUTOR: Function Attrs: nofree noinline nounwind uwtable
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define i32 @scc1(i32*)
define i32 @scc1(i32*) 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*)
; ATTRIBUTOR: Function Attrs: nofree noinline nounwind uwtable
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define void @scc2(i32*)
define void @scc2(i32*) 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, %"struct.std::atomic"* nocapture)
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR: define void @foo1(i32*, %"struct.std::atomic"*)
define void @foo1(i32*, %"struct.std::atomic"*) {
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, %"struct.std::atomic"* nocapture readonly)
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR: define void @bar(i32*, %"struct.std::atomic"*)
define void @bar(i32 *, %"struct.std::atomic"*) {
%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, %"struct.std::atomic"* nocapture)
; ATTRIBUTOR: Function Attrs: nofree nosync
; ATTRIBUTOR: define void @foo1_singlethread(i32*, %"struct.std::atomic"*)
define void @foo1_singlethread(i32*, %"struct.std::atomic"*) {
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, %"struct.std::atomic"* nocapture readonly)
; ATTRIBUTOR: Function Attrs: nofree nosync
; ATTRIBUTOR: define void @bar_singlethread(i32*, %"struct.std::atomic"*)
define void @bar_singlethread(i32 *, %"struct.std::atomic"*) {
%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.
; ATTRIBUTOR: Function Attrs: nounwind
; ATTRIBUTOR-NOT: nosync
; ATTRIBUTOR-NEXT: define i32 @memcpy_volatile(i8* %ptr1, i8* %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.
; ATTRIBUTOR: Function Attrs: nosync
; ATTRIBUTOR-NEXT: define i32 @memset_non_volatile(i8* %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
}
|
