304f1d59ca
This switches everything to use the memory attribute proposed in https://discourse.llvm.org/t/rfc-unify-memory-effect-attributes/65579. The old argmemonly, inaccessiblememonly and inaccessiblemem_or_argmemonly attributes are dropped. The readnone, readonly and writeonly attributes are restricted to parameters only. The old attributes are auto-upgraded both in bitcode and IR. The bitcode upgrade is a policy requirement that has to be retained indefinitely. The IR upgrade is mainly there so it's not necessary to update all tests using memory attributes in this patch, which is already large enough. We could drop that part after migrating tests, or retain it longer term, to make it easier to import IR from older LLVM versions. High-level Function/CallBase APIs like doesNotAccessMemory() or setDoesNotAccessMemory() are mapped transparently to the memory attribute. Code that directly manipulates attributes (e.g. via AttributeList) on the other hand needs to switch to working with the memory attribute instead. Differential Revision: https://reviews.llvm.org/D135780
132 lines
4.0 KiB
LLVM
132 lines
4.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
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; RUN: opt -passes=function-attrs -S < %s | FileCheck %s
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define i32 @nonleaf() convergent {
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; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
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; CHECK-LABEL: define {{[^@]+}}@nonleaf
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; CHECK-SAME: () #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 @leaf()
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; CHECK-NEXT: ret i32 [[A]]
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;
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%a = call i32 @leaf()
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ret i32 %a
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}
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define i32 @leaf() convergent {
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; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
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; CHECK-LABEL: define {{[^@]+}}@leaf
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; CHECK-SAME: () #[[ATTR0]] {
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; CHECK-NEXT: ret i32 0
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;
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ret i32 0
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}
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declare i32 @k() convergent
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define i32 @extern() convergent {
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; CHECK: Function Attrs: convergent
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; CHECK-LABEL: define {{[^@]+}}@extern
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; CHECK-SAME: () #[[ATTR1:[0-9]+]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 @k() #[[ATTR1]]
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; CHECK-NEXT: ret i32 [[A]]
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;
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%a = call i32 @k() convergent
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ret i32 %a
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}
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; Convergent should not be removed on the function here. Although the call is
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; not explicitly convergent, it picks up the convergent attr from the callee.
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define i32 @extern_non_convergent_call() convergent {
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; CHECK: Function Attrs: convergent
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; CHECK-LABEL: define {{[^@]+}}@extern_non_convergent_call
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; CHECK-SAME: () #[[ATTR1]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 @k()
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; CHECK-NEXT: ret i32 [[A]]
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;
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%a = call i32 @k()
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ret i32 %a
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}
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define i32 @indirect_convergent_call(ptr %f) convergent {
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; CHECK: Function Attrs: convergent
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; CHECK-LABEL: define {{[^@]+}}@indirect_convergent_call
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; CHECK-SAME: (ptr nocapture readonly [[F:%.*]]) #[[ATTR1]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 [[F]]() #[[ATTR1]]
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; CHECK-NEXT: ret i32 [[A]]
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;
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%a = call i32 %f() convergent
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ret i32 %a
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}
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; Give indirect_non_convergent_call the norecurse attribute so we get a
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; "Function Attrs" comment in the output.
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define i32 @indirect_non_convergent_call(ptr %f) convergent norecurse {
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; CHECK: Function Attrs: norecurse
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; CHECK-LABEL: define {{[^@]+}}@indirect_non_convergent_call
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; CHECK-SAME: (ptr nocapture readonly [[F:%.*]]) #[[ATTR2:[0-9]+]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 [[F]]()
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; CHECK-NEXT: ret i32 [[A]]
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;
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%a = call i32 %f()
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ret i32 %a
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}
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declare void @llvm.nvvm.barrier0() convergent
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define i32 @intrinsic() convergent {
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; Implicitly convergent, because the intrinsic is convergent.
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; CHECK: Function Attrs: convergent nounwind
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; CHECK-LABEL: define {{[^@]+}}@intrinsic
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; CHECK-SAME: () #[[ATTR4:[0-9]+]] {
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; CHECK-NEXT: call void @llvm.nvvm.barrier0()
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; CHECK-NEXT: ret i32 0
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;
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call void @llvm.nvvm.barrier0()
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ret i32 0
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}
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define i32 @recursive1() convergent {
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; CHECK: Function Attrs: nofree nosync nounwind memory(none)
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; CHECK-LABEL: define {{[^@]+}}@recursive1
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; CHECK-SAME: () #[[ATTR5:[0-9]+]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 @recursive2() #[[ATTR1]]
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; CHECK-NEXT: ret i32 [[A]]
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;
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%a = call i32 @recursive2() convergent
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ret i32 %a
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}
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define i32 @recursive2() convergent {
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; CHECK: Function Attrs: nofree nosync nounwind memory(none)
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; CHECK-LABEL: define {{[^@]+}}@recursive2
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; CHECK-SAME: () #[[ATTR5]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 @recursive1() #[[ATTR1]]
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; CHECK-NEXT: ret i32 [[A]]
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;
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%a = call i32 @recursive1() convergent
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ret i32 %a
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}
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define i32 @noopt() convergent optnone noinline {
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; CHECK: Function Attrs: convergent noinline optnone
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; CHECK-LABEL: define {{[^@]+}}@noopt
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; CHECK-SAME: () #[[ATTR6:[0-9]+]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 @noopt_friend() #[[ATTR1]]
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; CHECK-NEXT: ret i32 0
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;
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%a = call i32 @noopt_friend() convergent
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ret i32 0
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}
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; A function which is mutually-recursive with a convergent, optnone function
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; shouldn't have its convergent attribute stripped.
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define i32 @noopt_friend() convergent {
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; CHECK: Function Attrs: convergent
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; CHECK-LABEL: define {{[^@]+}}@noopt_friend
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; CHECK-SAME: () #[[ATTR1]] {
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; CHECK-NEXT: [[A:%.*]] = call i32 @noopt()
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; CHECK-NEXT: ret i32 0
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;
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%a = call i32 @noopt()
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ret i32 0
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}
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