diff --git a/clang/test/CodeGen/attr-counted-by-pr88931.cpp b/clang/test/CodeGen/attr-counted-by-pr88931.cpp index 2a8cc1d07e50d9..6d0c46bbbe8f9c 100644 --- a/clang/test/CodeGen/attr-counted-by-pr88931.cpp +++ b/clang/test/CodeGen/attr-counted-by-pr88931.cpp @@ -13,7 +13,7 @@ void init(void * __attribute__((pass_dynamic_object_size(0)))); // CHECK-LABEL: define dso_local void @_ZN3foo3barC1Ev( // CHECK-SAME: ptr noundef nonnull align 4 dereferenceable(1) [[THIS:%.*]]) unnamed_addr #[[ATTR0:[0-9]+]] align 2 { // CHECK-NEXT: entry: -// CHECK-NEXT: tail call void @_Z4initPvU25pass_dynamic_object_size0(ptr noundef nonnull [[THIS]], i64 noundef -1) #[[ATTR2:[0-9]+]] +// CHECK-NEXT: tail call void @_Z4initPvU25pass_dynamic_object_size0(ptr noundef nonnull align 4 dereferenceable(1) [[THIS]], i64 noundef -1) #[[ATTR2:[0-9]+]] // CHECK-NEXT: ret void // foo::bar::bar() { diff --git a/clang/test/OpenMP/bug57757.cpp b/clang/test/OpenMP/bug57757.cpp index 240b22a3067143..eabf233dde2474 100644 --- a/clang/test/OpenMP/bug57757.cpp +++ b/clang/test/OpenMP/bug57757.cpp @@ -39,7 +39,7 @@ void foo() { // CHECK-NEXT: ] // CHECK: .untied.jmp..i: // CHECK-NEXT: store i32 1, ptr [[TMP2]], align 4, !tbaa [[TBAA16]], !alias.scope [[META13]], !noalias [[META17]] -// CHECK-NEXT: [[TMP4:%.*]] = tail call i32 @__kmpc_omp_task(ptr nonnull @[[GLOB1]], i32 [[TMP0]], ptr [[TMP1]]), !noalias [[META13]] +// CHECK-NEXT: [[TMP4:%.*]] = tail call i32 @__kmpc_omp_task(ptr nonnull @[[GLOB1]], i32 [[TMP0]], ptr nonnull [[TMP1]]), !noalias [[META13]] // CHECK-NEXT: br label [[DOTOMP_OUTLINED__EXIT]] // CHECK: .untied.next..i: // CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP1]], i64 40 diff --git a/llvm/include/llvm/IR/Attributes.h b/llvm/include/llvm/IR/Attributes.h index feeb3a9ddba932..2755ced404dddb 100644 --- a/llvm/include/llvm/IR/Attributes.h +++ b/llvm/include/llvm/IR/Attributes.h @@ -947,6 +947,9 @@ class AttributeList { /// arg. uint64_t getParamDereferenceableOrNullBytes(unsigned ArgNo) const; + /// Get range (or std::nullopt if unknown) of an arg. + std::optional getParamRange(unsigned ArgNo) const; + /// Get the disallowed floating-point classes of the return value. FPClassTest getRetNoFPClass() const; @@ -1123,6 +1126,10 @@ class AttrBuilder { /// invalid if the Kind is not present in the builder. Attribute getAttribute(StringRef Kind) const; + /// Retrieve the range if the attribute exists (std::nullopt is returned + /// otherwise). + std::optional getRange() const; + /// Return raw (possibly packed/encoded) value of integer attribute or /// std::nullopt if not set. std::optional getRawIntAttr(Attribute::AttrKind Kind) const; diff --git a/llvm/lib/IR/Attributes.cpp b/llvm/lib/IR/Attributes.cpp index 223c917766a457..e9daa01b899e8f 100644 --- a/llvm/lib/IR/Attributes.cpp +++ b/llvm/lib/IR/Attributes.cpp @@ -1931,6 +1931,14 @@ AttributeList::getParamDereferenceableOrNullBytes(unsigned Index) const { return getParamAttrs(Index).getDereferenceableOrNullBytes(); } +std::optional +AttributeList::getParamRange(unsigned ArgNo) const { + auto RangeAttr = getParamAttrs(ArgNo).getAttribute(Attribute::Range); + if (RangeAttr.isValid()) + return RangeAttr.getRange(); + return std::nullopt; +} + FPClassTest AttributeList::getRetNoFPClass() const { return getRetAttrs().getNoFPClass(); } @@ -2277,6 +2285,13 @@ Attribute AttrBuilder::getAttribute(StringRef A) const { return {}; } +std::optional AttrBuilder::getRange() const { + const Attribute RangeAttr = getAttribute(Attribute::Range); + if (RangeAttr.isValid()) + return RangeAttr.getRange(); + return std::nullopt; +} + bool AttrBuilder::contains(Attribute::AttrKind A) const { return getAttribute(A).isValid(); } diff --git a/llvm/lib/Transforms/Utils/InlineFunction.cpp b/llvm/lib/Transforms/Utils/InlineFunction.cpp index a0a93dc0dab5fc..4ad426285ce2f0 100644 --- a/llvm/lib/Transforms/Utils/InlineFunction.cpp +++ b/llvm/lib/Transforms/Utils/InlineFunction.cpp @@ -34,6 +34,7 @@ #include "llvm/Analysis/VectorUtils.h" #include "llvm/IR/Argument.h" #include "llvm/IR/AttributeMask.h" +#include "llvm/IR/Attributes.h" #include "llvm/IR/BasicBlock.h" #include "llvm/IR/CFG.h" #include "llvm/IR/Constant.h" @@ -59,6 +60,7 @@ #include "llvm/IR/MDBuilder.h" #include "llvm/IR/Metadata.h" #include "llvm/IR/Module.h" +#include "llvm/IR/PatternMatch.h" #include "llvm/IR/ProfDataUtils.h" #include "llvm/IR/Type.h" #include "llvm/IR/User.h" @@ -1358,18 +1360,36 @@ static void AddParamAndFnBasicAttributes(const CallBase &CB, auto &Context = CalledFunction->getContext(); // Collect valid attributes for all params. - SmallVector ValidParamAttrs; + SmallVector ValidObjParamAttrs, ValidExactParamAttrs; bool HasAttrToPropagate = false; + // Attributes we can only propagate if the exact parameter is forwarded. + // We can propagate both poison generating and UB generating attributes + // without any extra checks. The only attribute that is tricky to propagate + // is `noundef` (skipped for now) as that can create new UB where previous + // behavior was just using a poison value. + static const Attribute::AttrKind ExactAttrsToPropagate[] = { + Attribute::Dereferenceable, Attribute::DereferenceableOrNull, + Attribute::NonNull, Attribute::Alignment, Attribute::Range}; + for (unsigned I = 0, E = CB.arg_size(); I < E; ++I) { - ValidParamAttrs.emplace_back(AttrBuilder{CB.getContext()}); + ValidObjParamAttrs.emplace_back(AttrBuilder{CB.getContext()}); + ValidExactParamAttrs.emplace_back(AttrBuilder{CB.getContext()}); // Access attributes can be propagated to any param with the same underlying // object as the argument. if (CB.paramHasAttr(I, Attribute::ReadNone)) - ValidParamAttrs.back().addAttribute(Attribute::ReadNone); + ValidObjParamAttrs.back().addAttribute(Attribute::ReadNone); if (CB.paramHasAttr(I, Attribute::ReadOnly)) - ValidParamAttrs.back().addAttribute(Attribute::ReadOnly); - HasAttrToPropagate |= ValidParamAttrs.back().hasAttributes(); + ValidObjParamAttrs.back().addAttribute(Attribute::ReadOnly); + + for (Attribute::AttrKind AK : ExactAttrsToPropagate) { + Attribute Attr = CB.getParamAttr(I, AK); + if (Attr.isValid()) + ValidExactParamAttrs.back().addAttribute(Attr); + } + + HasAttrToPropagate |= ValidObjParamAttrs.back().hasAttributes(); + HasAttrToPropagate |= ValidExactParamAttrs.back().hasAttributes(); } // Won't be able to propagate anything. @@ -1391,22 +1411,60 @@ static void AddParamAndFnBasicAttributes(const CallBase &CB, AttributeList AL = NewInnerCB->getAttributes(); for (unsigned I = 0, E = InnerCB->arg_size(); I < E; ++I) { - // Check if the underlying value for the parameter is an argument. - const Value *UnderlyingV = - getUnderlyingObject(InnerCB->getArgOperand(I)); - const Argument *Arg = dyn_cast(UnderlyingV); - if (!Arg) + // It's unsound or requires special handling to propagate + // attributes to byval arguments. Even if CalledFunction + // doesn't e.g. write to the argument (readonly), the call to + // NewInnerCB may write to its by-value copy. + if (NewInnerCB->paramHasAttr(I, Attribute::ByVal)) continue; - if (NewInnerCB->paramHasAttr(I, Attribute::ByVal)) - // It's unsound to propagate memory attributes to byval arguments. - // Even if CalledFunction doesn't e.g. write to the argument, - // the call to NewInnerCB may write to its by-value copy. + // Don't bother propagating attrs to constants. + if (match(NewInnerCB->getArgOperand(I), + llvm::PatternMatch::m_ImmConstant())) continue; - unsigned ArgNo = Arg->getArgNo(); + // Check if the underlying value for the parameter is an argument. + const Argument *Arg = dyn_cast(InnerCB->getArgOperand(I)); + unsigned ArgNo; + if (Arg) { + ArgNo = Arg->getArgNo(); + // For dereferenceable, dereferenceable_or_null, align, etc... + // we don't want to propagate if the existing param has the same + // attribute with "better" constraints. So remove from the + // new AL if the region of the existing param is larger than + // what we can propagate. + AttrBuilder NewAB{ + Context, AttributeSet::get(Context, ValidExactParamAttrs[ArgNo])}; + if (AL.getParamDereferenceableBytes(I) > + NewAB.getDereferenceableBytes()) + NewAB.removeAttribute(Attribute::Dereferenceable); + if (AL.getParamDereferenceableOrNullBytes(I) > + NewAB.getDereferenceableOrNullBytes()) + NewAB.removeAttribute(Attribute::DereferenceableOrNull); + if (AL.getParamAlignment(I).valueOrOne() > + NewAB.getAlignment().valueOrOne()) + NewAB.removeAttribute(Attribute::Alignment); + if (auto ExistingRange = AL.getParamRange(I)) { + if (auto NewRange = NewAB.getRange()) { + ConstantRange CombinedRange = + ExistingRange->intersectWith(*NewRange); + NewAB.removeAttribute(Attribute::Range); + NewAB.addRangeAttr(CombinedRange); + } + } + AL = AL.addParamAttributes(Context, I, NewAB); + } else { + // Check if the underlying value for the parameter is an argument. + const Value *UnderlyingV = + getUnderlyingObject(InnerCB->getArgOperand(I)); + Arg = dyn_cast(UnderlyingV); + if (!Arg) + continue; + ArgNo = Arg->getArgNo(); + } + // If so, propagate its access attributes. - AL = AL.addParamAttributes(Context, I, ValidParamAttrs[ArgNo]); + AL = AL.addParamAttributes(Context, I, ValidObjParamAttrs[ArgNo]); // We can have conflicting attributes from the inner callsite and // to-be-inlined callsite. In that case, choose the most // restrictive. diff --git a/llvm/test/Transforms/Inline/access-attributes-prop.ll b/llvm/test/Transforms/Inline/access-attributes-prop.ll index 5051c92345ec75..5bf845d5ba94b3 100644 --- a/llvm/test/Transforms/Inline/access-attributes-prop.ll +++ b/llvm/test/Transforms/Inline/access-attributes-prop.ll @@ -47,7 +47,6 @@ define dso_local void @foo3_writable(ptr %p) { ret void } - define dso_local void @foo1_bar_aligned64_deref512(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@foo1_bar_aligned64_deref512 ; CHECK-SAME: (ptr [[P:%.*]]) { @@ -306,7 +305,7 @@ define void @prop_param_callbase_def_1x_partial_3(ptr %p, ptr %p2) { define void @prop_deref(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@prop_deref ; CHECK-SAME: (ptr [[P:%.*]]) { -; CHECK-NEXT: call void @bar1(ptr [[P]]) +; CHECK-NEXT: call void @bar1(ptr dereferenceable(16) [[P]]) ; CHECK-NEXT: ret void ; call void @foo1(ptr dereferenceable(16) %p) @@ -316,7 +315,7 @@ define void @prop_deref(ptr %p) { define void @prop_deref_or_null(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@prop_deref_or_null ; CHECK-SAME: (ptr [[P:%.*]]) { -; CHECK-NEXT: call void @bar1(ptr [[P]]) +; CHECK-NEXT: call void @bar1(ptr dereferenceable_or_null(256) [[P]]) ; CHECK-NEXT: ret void ; call void @foo1(ptr dereferenceable_or_null(256) %p) @@ -326,13 +325,23 @@ define void @prop_deref_or_null(ptr %p) { define void @prop_param_nonnull_and_align(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@prop_param_nonnull_and_align ; CHECK-SAME: (ptr [[P:%.*]]) { -; CHECK-NEXT: call void @bar1(ptr [[P]]) +; CHECK-NEXT: call void @bar1(ptr nonnull align 32 [[P]]) ; CHECK-NEXT: ret void ; call void @foo1(ptr nonnull align 32 %p) ret void } +define void @prop_param_nofree_and_align(ptr %p) { +; CHECK-LABEL: define {{[^@]+}}@prop_param_nofree_and_align +; CHECK-SAME: (ptr [[P:%.*]]) { +; CHECK-NEXT: call void @bar1(ptr align 32 [[P]]) +; CHECK-NEXT: ret void +; + call void @foo1(ptr nofree align 32 %p) + ret void +} + define void @prop_param_deref_align_no_update(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@prop_param_deref_align_no_update ; CHECK-SAME: (ptr [[P:%.*]]) { @@ -346,7 +355,7 @@ define void @prop_param_deref_align_no_update(ptr %p) { define void @prop_param_deref_align_update(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@prop_param_deref_align_update ; CHECK-SAME: (ptr [[P:%.*]]) { -; CHECK-NEXT: call void @bar1(ptr align 64 dereferenceable(512) [[P]]) +; CHECK-NEXT: call void @bar1(ptr align 128 dereferenceable(1024) [[P]]) ; CHECK-NEXT: ret void ; call void @foo1_bar_aligned64_deref512(ptr align 128 dereferenceable(1024) %p) @@ -356,7 +365,7 @@ define void @prop_param_deref_align_update(ptr %p) { define void @prop_param_deref_or_null_update(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@prop_param_deref_or_null_update ; CHECK-SAME: (ptr [[P:%.*]]) { -; CHECK-NEXT: call void @bar1(ptr align 512 dereferenceable_or_null(512) [[P]]) +; CHECK-NEXT: call void @bar1(ptr align 512 dereferenceable_or_null(1024) [[P]]) ; CHECK-NEXT: ret void ; call void @foo1_bar_aligned512_deref_or_null512(ptr dereferenceable_or_null(1024) %p) @@ -539,7 +548,6 @@ define void @prop_no_conflict_writable(ptr %p) { ret void } - define void @prop_no_conflict_writable2(ptr %p) { ; CHECK-LABEL: define {{[^@]+}}@prop_no_conflict_writable2 ; CHECK-SAME: (ptr [[P:%.*]]) { @@ -600,3 +608,145 @@ define void @prop_byval_readonly2(ptr %p) { call void @foo_byval_readonly2(ptr %p) ret void } + +declare void @bar5(i32) + +define dso_local void @foo4_range_0_10(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@foo4_range_0_10 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 0, 10) [[V]]) +; CHECK-NEXT: ret void +; + call void @bar5(i32 range(i32 0, 10) %v) + ret void +} + +define dso_local void @foo4_range_10_40(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@foo4_range_10_40 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 10, 40) [[V]]) +; CHECK-NEXT: ret void +; + call void @bar5(i32 range(i32 10, 40) %v) + ret void +} + +define dso_local void @foo4_2_range_0_10(i32 range(i32 0, 10) %v) { +; CHECK-LABEL: define {{[^@]+}}@foo4_2_range_0_10 +; CHECK-SAME: (i32 range(i32 0, 10) [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 [[V]]) +; CHECK-NEXT: ret void +; + call void @bar5(i32 %v) + ret void +} + +define dso_local void @foo4(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@foo4 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 [[V]]) +; CHECK-NEXT: ret void +; + call void @bar5(i32 %v) + ret void +} + +define void @prop_range_empty_intersect(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_empty_intersect +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 0, 0) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_range_0_10(i32 range(i32 11, 50) %v) + ret void +} + +define void @prop_range_empty(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_empty +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 1, 0) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4(i32 range(i32 1, 0) %v) + ret void +} + +define void @prop_range_empty_with_intersect(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_empty_with_intersect +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 1, 10) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_range_0_10(i32 range(i32 1, 0) %v) + ret void +} + +define void @prop_range_intersect1(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_intersect1 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 0, 9) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_range_0_10(i32 range(i32 0, 9) %v) + ret void +} + +define void @prop_range_intersect2(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_intersect2 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 1, 9) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_range_0_10(i32 range(i32 1, 9) %v) + ret void +} + +define void @prop_range_intersect3(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_intersect3 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 0, 11) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_2_range_0_10(i32 range(i32 0, 11) %v) + ret void +} + +define void @prop_range_intersect4(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_intersect4 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 0, 5) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_range_0_10(i32 range(i32 40, 5) %v) + ret void +} + +define void @prop_range_intersect5(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_intersect5 +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 10, 40) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_range_10_40(i32 range(i32 30, 20) %v) + ret void +} + +define void @prop_range_keep(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_keep +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 10, 40) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4_range_10_40(i32 %v) + ret void +} + +define void @prop_range_direct(i32 %v) { +; CHECK-LABEL: define {{[^@]+}}@prop_range_direct +; CHECK-SAME: (i32 [[V:%.*]]) { +; CHECK-NEXT: call void @bar5(i32 range(i32 1, 11) [[V]]) +; CHECK-NEXT: ret void +; + call void @foo4(i32 range(i32 1, 11) %v) + ret void +} diff --git a/llvm/test/Transforms/Inline/assumptions-from-callsite-attrs.ll b/llvm/test/Transforms/Inline/assumptions-from-callsite-attrs.ll index 1a219a22019c43..c0943f4aefb8f9 100644 --- a/llvm/test/Transforms/Inline/assumptions-from-callsite-attrs.ll +++ b/llvm/test/Transforms/Inline/assumptions-from-callsite-attrs.ll @@ -8,7 +8,7 @@ declare void @h(ptr %p, ptr %q, ptr %z) define void @f(ptr %p, ptr %q, ptr %z) { ; CHECK-LABEL: define void @f ; CHECK-SAME: (ptr [[P:%.*]], ptr [[Q:%.*]], ptr [[Z:%.*]]) { -; CHECK-NEXT: call void @h(ptr [[P]], ptr [[Q]], ptr [[Z]]) +; CHECK-NEXT: call void @h(ptr nonnull [[P]], ptr [[Q]], ptr nonnull [[Z]]) ; CHECK-NEXT: ret void ; call void @g(ptr nonnull %p, ptr %q, ptr nonnull %z) diff --git a/llvm/test/Transforms/Inline/byval.ll b/llvm/test/Transforms/Inline/byval.ll index dd5be40b90a8f2..1a70da8472cb1e 100644 --- a/llvm/test/Transforms/Inline/byval.ll +++ b/llvm/test/Transforms/Inline/byval.ll @@ -106,7 +106,7 @@ define void @test3() nounwind { ; CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_SS]], align 1 ; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr [[S1]]) ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 [[S1]], ptr align 1 [[S]], i64 12, i1 false) -; CHECK-NEXT: call void @g3(ptr [[S1]]) #[[ATTR0]] +; CHECK-NEXT: call void @g3(ptr align 64 [[S1]]) #[[ATTR0]] ; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr [[S1]]) ; CHECK-NEXT: ret void ; @@ -131,7 +131,7 @@ define i32 @test4() nounwind { ; CHECK-SAME: ) #[[ATTR0]] { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_SS:%.*]], align 64 -; CHECK-NEXT: call void @g3(ptr [[S]]) #[[ATTR0]] +; CHECK-NEXT: call void @g3(ptr align 64 [[S]]) #[[ATTR0]] ; CHECK-NEXT: ret i32 4 ; entry: diff --git a/llvm/test/Transforms/PhaseOrdering/pr95152.ll b/llvm/test/Transforms/PhaseOrdering/pr95152.ll index 16610c439f4c04..fff94673a1a519 100644 --- a/llvm/test/Transforms/PhaseOrdering/pr95152.ll +++ b/llvm/test/Transforms/PhaseOrdering/pr95152.ll @@ -47,7 +47,7 @@ define void @f(ptr dead_on_unwind noalias %p) { ; CHECK-LABEL: define void @f( ; CHECK-SAME: ptr dead_on_unwind noalias [[P:%.*]]) local_unnamed_addr { ; CHECK-NEXT: store i64 3, ptr [[P]], align 4 -; CHECK-NEXT: tail call void @j(ptr nonnull [[P]]) +; CHECK-NEXT: tail call void @j(ptr nonnull align 8 dereferenceable(8) [[P]]) ; CHECK-NEXT: store i64 43, ptr [[P]], align 4 ; CHECK-NEXT: ret void ;