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clang-p2996/llvm/test/Transforms/Attributor/undefined_behavior.ll
Nikita Popov 304f1d59ca [IR] Switch everything to use memory attribute 
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
2022-11-04 10:21:38 +01:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=7 -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,CGSCC
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Test cases specifically designed for the "undefined behavior" abstract function attribute.
; We want to verify that whenever undefined behavior is assumed, the code becomes unreachable.
; We use FIXME's to indicate problems and missing attributes.
; -- Load tests --
define void @load_wholly_unreachable() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@load_wholly_unreachable
; CHECK-SAME: () #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: unreachable
;
%a = load i32, i32* null
ret void
}
define void @loads_wholly_unreachable() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@loads_wholly_unreachable
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: unreachable
;
%a = load i32, i32* null
%b = load i32, i32* null
ret void
}
define void @load_single_bb_unreachable(i1 %cond) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@load_single_bb_unreachable
; CHECK-SAME: (i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: unreachable
; CHECK: e:
; CHECK-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
%b = load i32, i32* null
br label %e
e:
ret void
}
; Note that while the load is removed (because it's unused), the block
; is not changed to unreachable
define void @load_null_pointer_is_defined() null_pointer_is_valid {
; CHECK: Function Attrs: nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@load_null_pointer_is_defined
; CHECK-SAME: () #[[ATTR1:[0-9]+]] {
; CHECK-NEXT: ret void
;
%a = load i32, i32* null
ret void
}
define internal i32* @ret_null() {
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@ret_null
; CGSCC-SAME: () #[[ATTR0]] {
; CGSCC-NEXT: ret i32* null
;
ret i32* null
}
define void @load_null_propagated() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@load_null_propagated
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@load_null_propagated
; CGSCC-SAME: () #[[ATTR2:[0-9]+]] {
; CGSCC-NEXT: ret void
;
%ptr = call i32* @ret_null()
%a = load i32, i32* %ptr
ret void
}
; -- Store tests --
define void @store_wholly_unreachable() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@store_wholly_unreachable
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: unreachable
;
store i32 5, i32* null
ret void
}
define void @store_wholly_unreachable_volatile() {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@store_wholly_unreachable_volatile
; TUNIT-SAME: () #[[ATTR2:[0-9]+]] {
; TUNIT-NEXT: store volatile i32 5, i32* null, align 4294967296
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@store_wholly_unreachable_volatile
; CGSCC-SAME: () #[[ATTR3:[0-9]+]] {
; CGSCC-NEXT: store volatile i32 5, i32* null, align 4294967296
; CGSCC-NEXT: ret void
;
store volatile i32 5, i32* null
ret void
}
define void @store_single_bb_unreachable(i1 %cond) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@store_single_bb_unreachable
; CHECK-SAME: (i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: unreachable
; CHECK: e:
; CHECK-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
store i32 5, i32* null
br label %e
e:
ret void
}
define void @store_null_pointer_is_defined() null_pointer_is_valid {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write)
; TUNIT-LABEL: define {{[^@]+}}@store_null_pointer_is_defined
; TUNIT-SAME: () #[[ATTR3:[0-9]+]] {
; TUNIT-NEXT: store i32 5, i32* null, align 4294967296
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write)
; CGSCC-LABEL: define {{[^@]+}}@store_null_pointer_is_defined
; CGSCC-SAME: () #[[ATTR4:[0-9]+]] {
; CGSCC-NEXT: store i32 5, i32* null, align 4294967296
; CGSCC-NEXT: ret void
;
store i32 5, i32* null
ret void
}
define void @store_null_propagated() {
; ATTRIBUTOR-LABEL: @store_null_propagated(
; ATTRIBUTOR-NEXT: unreachable
;
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@store_null_propagated
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(write)
; CGSCC-LABEL: define {{[^@]+}}@store_null_propagated
; CGSCC-SAME: () #[[ATTR5:[0-9]+]] {
; CGSCC-NEXT: [[PTR:%.*]] = call noalias align 4294967296 i32* @ret_null() #[[ATTR10:[0-9]+]]
; CGSCC-NEXT: ret void
;
%ptr = call i32* @ret_null()
store i32 5, i32* %ptr
ret void
}
; -- AtomicRMW tests --
define void @atomicrmw_wholly_unreachable() {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_wholly_unreachable
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_wholly_unreachable
; CGSCC-SAME: () #[[ATTR3]] {
; CGSCC-NEXT: unreachable
;
%a = atomicrmw add i32* null, i32 1 acquire
ret void
}
define void @atomicrmw_single_bb_unreachable(i1 %cond) {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_single_bb_unreachable
; TUNIT-SAME: (i1 [[COND:%.*]]) #[[ATTR2]] {
; TUNIT-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_single_bb_unreachable
; CGSCC-SAME: (i1 [[COND:%.*]]) #[[ATTR3]] {
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
%a = atomicrmw add i32* null, i32 1 acquire
br label %e
e:
ret void
}
define void @atomicrmw_null_pointer_is_defined() null_pointer_is_valid {
; TUNIT: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_null_pointer_is_defined
; TUNIT-SAME: () #[[ATTR4:[0-9]+]] {
; TUNIT-NEXT: [[A:%.*]] = atomicrmw add i32* null, i32 1 acquire, align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_null_pointer_is_defined
; CGSCC-SAME: () #[[ATTR6:[0-9]+]] {
; CGSCC-NEXT: [[A:%.*]] = atomicrmw add i32* null, i32 1 acquire, align 4
; CGSCC-NEXT: ret void
;
%a = atomicrmw add i32* null, i32 1 acquire
ret void
}
define void @atomicrmw_null_propagated() {
; ATTRIBUTOR-LABEL: @atomicrmw_null_propagated(
; ATTRIBUTOR-NEXT: unreachable
;
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomicrmw_null_propagated
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomicrmw_null_propagated
; CGSCC-SAME: () #[[ATTR7:[0-9]+]] {
; CGSCC-NEXT: [[PTR:%.*]] = call noalias i32* @ret_null() #[[ATTR10]]
; CGSCC-NEXT: [[A:%.*]] = atomicrmw add i32* [[PTR]], i32 1 acquire, align 4
; CGSCC-NEXT: ret void
;
%ptr = call i32* @ret_null()
%a = atomicrmw add i32* %ptr, i32 1 acquire
ret void
}
; -- AtomicCmpXchg tests --
define void @atomiccmpxchg_wholly_unreachable() {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_wholly_unreachable
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_wholly_unreachable
; CGSCC-SAME: () #[[ATTR3]] {
; CGSCC-NEXT: unreachable
;
%a = cmpxchg i32* null, i32 2, i32 3 acq_rel monotonic
ret void
}
define void @atomiccmpxchg_single_bb_unreachable(i1 %cond) {
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_single_bb_unreachable
; TUNIT-SAME: (i1 [[COND:%.*]]) #[[ATTR2]] {
; TUNIT-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_single_bb_unreachable
; CGSCC-SAME: (i1 [[COND:%.*]]) #[[ATTR3]] {
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: ret void
;
br i1 %cond, label %t, label %e
t:
%a = cmpxchg i32* null, i32 2, i32 3 acq_rel monotonic
br label %e
e:
ret void
}
define void @atomiccmpxchg_null_pointer_is_defined() null_pointer_is_valid {
; TUNIT: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_null_pointer_is_defined
; TUNIT-SAME: () #[[ATTR4]] {
; TUNIT-NEXT: [[A:%.*]] = cmpxchg i32* null, i32 2, i32 3 acq_rel monotonic, align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nounwind null_pointer_is_valid willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_null_pointer_is_defined
; CGSCC-SAME: () #[[ATTR6]] {
; CGSCC-NEXT: [[A:%.*]] = cmpxchg i32* null, i32 2, i32 3 acq_rel monotonic, align 4
; CGSCC-NEXT: ret void
;
%a = cmpxchg i32* null, i32 2, i32 3 acq_rel monotonic
ret void
}
define void @atomiccmpxchg_null_propagated() {
; ATTRIBUTOR-LABEL: @atomiccmpxchg_null_propagated(
; ATTRIBUTOR-NEXT: unreachable
;
; TUNIT: Function Attrs: nofree norecurse nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@atomiccmpxchg_null_propagated
; TUNIT-SAME: () #[[ATTR2]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@atomiccmpxchg_null_propagated
; CGSCC-SAME: () #[[ATTR7]] {
; CGSCC-NEXT: [[PTR:%.*]] = call noalias i32* @ret_null() #[[ATTR10]]
; CGSCC-NEXT: [[A:%.*]] = cmpxchg i32* [[PTR]], i32 2, i32 3 acq_rel monotonic, align 4
; CGSCC-NEXT: ret void
;
%ptr = call i32* @ret_null()
%a = cmpxchg i32* %ptr, i32 2, i32 3 acq_rel monotonic
ret void
}
; -- Conditional branching tests --
; Note: The unreachable on %t and %e is _not_ from AAUndefinedBehavior
define i32 @cond_br_on_undef() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef
; TUNIT-SAME: () #[[ATTR5:[0-9]+]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef
; CGSCC-SAME: () #[[ATTR8:[0-9]+]] {
; CGSCC-NEXT: unreachable
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: unreachable
;
br i1 undef, label %t, label %e
t:
ret i32 1
e:
ret i32 2
}
; More complicated branching
; Valid branch - verify that this is not converted
; to unreachable.
define void @cond_br_on_undef2(i1 %cond) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef2
; CHECK-SAME: (i1 [[COND:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: br i1 [[COND]], label [[T1:%.*]], label [[E1:%.*]]
; CHECK: t1:
; CHECK-NEXT: unreachable
; CHECK: t2:
; CHECK-NEXT: unreachable
; CHECK: e2:
; CHECK-NEXT: unreachable
; CHECK: e1:
; CHECK-NEXT: ret void
;
br i1 %cond, label %t1, label %e1
t1:
br i1 undef, label %t2, label %e2
t2:
ret void
e2:
ret void
e1:
ret void
}
define i1 @ret_undef() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@ret_undef
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: ret i1 undef
;
ret i1 undef
}
define void @cond_br_on_undef_interproc() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc
; TUNIT-SAME: () #[[ATTR5]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: [[COND:%.*]] = call i1 @ret_undef() #[[ATTR10]]
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: ret void
; CGSCC: e:
; CGSCC-NEXT: ret void
;
%cond = call i1 @ret_undef()
br i1 %cond, label %t, label %e
t:
ret void
e:
ret void
}
define i1 @ret_undef2() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@ret_undef2
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: br i1 true, label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: ret i1 undef
; CHECK: e:
; CHECK-NEXT: unreachable
;
br i1 true, label %t, label %e
t:
ret i1 undef
e:
ret i1 undef
}
; More complicated interproc deduction of undef
define void @cond_br_on_undef_interproc2() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc2
; TUNIT-SAME: () #[[ATTR5]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc2
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: [[COND:%.*]] = call i1 @ret_undef2() #[[ATTR10]]
; CGSCC-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CGSCC: t:
; CGSCC-NEXT: ret void
; CGSCC: e:
; CGSCC-NEXT: ret void
;
%cond = call i1 @ret_undef2()
br i1 %cond, label %t, label %e
t:
ret void
e:
ret void
}
; Branch on undef that depends on propagation of
; undef of a previous instruction.
define i32 @cond_br_on_undef3() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef3
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 1, undef
; CHECK-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: ret i32 1
; CHECK: e:
; CHECK-NEXT: ret i32 2
;
%cond = icmp ne i32 1, undef
br i1 %cond, label %t, label %e
t:
ret i32 1
e:
ret i32 2
}
; Branch on undef because of uninitialized value.
; FIXME: Currently it doesn't propagate the undef.
define i32 @cond_br_on_undef_uninit() {
; TUNIT: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@cond_br_on_undef_uninit
; TUNIT-SAME: () #[[ATTR5]] {
; TUNIT-NEXT: unreachable
; TUNIT: t:
; TUNIT-NEXT: unreachable
; TUNIT: e:
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree norecurse noreturn nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@cond_br_on_undef_uninit
; CGSCC-SAME: () #[[ATTR8]] {
; CGSCC-NEXT: unreachable
; CGSCC: t:
; CGSCC-NEXT: unreachable
; CGSCC: e:
; CGSCC-NEXT: unreachable
;
%alloc = alloca i1
%cond = load i1, i1* %alloc
br i1 %cond, label %t, label %e
t:
ret i32 1
e:
ret i32 2
}
; Note that the `load` has UB (so it will be changed to unreachable)
; and the branch is a terminator that can be constant-folded.
; We want to test that doing both won't cause a segfault.
; MODULE-NOT: @callee(
define internal i32 @callee(i1 %C, i32* %A) {
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@callee
; CGSCC-SAME: () #[[ATTR0]] {
; CGSCC-NEXT: entry:
; CGSCC-NEXT: unreachable
; CGSCC: T:
; CGSCC-NEXT: unreachable
; CGSCC: F:
; CGSCC-NEXT: ret i32 1
;
entry:
%A.0 = load i32, i32* null
br i1 %C, label %T, label %F
T:
ret i32 %A.0
F:
ret i32 1
}
define i32 @foo() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@foo
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: ret i32 1
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@foo
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: [[X:%.*]] = call noundef i32 @callee() #[[ATTR10]]
; CGSCC-NEXT: ret i32 [[X]]
;
%X = call i32 @callee(i1 false, i32* null)
ret i32 %X
}
; Tests for nonnull noundef attribute violation.
;
; Tests for argument position
define void @arg_nonnull_1(i32* nonnull %a) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_1
; TUNIT-SAME: (i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR6:[0-9]+]] {
; TUNIT-NEXT: store i32 0, i32* [[A]], align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_1
; CGSCC-SAME: (i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR9:[0-9]+]] {
; CGSCC-NEXT: store i32 0, i32* [[A]], align 4
; CGSCC-NEXT: ret void
;
store i32 0, i32* %a
ret void
}
define void @arg_nonnull_1_noundef_1(i32* nonnull noundef %a) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_1_noundef_1
; TUNIT-SAME: (i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR6]] {
; TUNIT-NEXT: store i32 0, i32* [[A]], align 4
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_1_noundef_1
; CGSCC-SAME: (i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[A:%.*]]) #[[ATTR9]] {
; CGSCC-NEXT: store i32 0, i32* [[A]], align 4
; CGSCC-NEXT: ret void
;
store i32 0, i32* %a
ret void
}
define void @arg_nonnull_12(i32* nonnull %a, i32* nonnull %b, i32* %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_12
; TUNIT-SAME: (i32* nocapture nofree nonnull writeonly [[A:%.*]], i32* nocapture nofree nonnull writeonly [[B:%.*]], i32* nofree writeonly [[C:%.*]]) #[[ATTR6]] {
; TUNIT-NEXT: [[D:%.*]] = icmp eq i32* [[C]], null
; TUNIT-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: store i32 0, i32* [[A]], align 4
; TUNIT-NEXT: br label [[RET:%.*]]
; TUNIT: f:
; TUNIT-NEXT: store i32 1, i32* [[B]], align 4
; TUNIT-NEXT: br label [[RET]]
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_12
; CGSCC-SAME: (i32* nocapture nofree nonnull writeonly [[A:%.*]], i32* nocapture nofree nonnull writeonly [[B:%.*]], i32* nofree writeonly [[C:%.*]]) #[[ATTR9]] {
; CGSCC-NEXT: [[D:%.*]] = icmp eq i32* [[C]], null
; CGSCC-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: store i32 0, i32* [[A]], align 4
; CGSCC-NEXT: br label [[RET:%.*]]
; CGSCC: f:
; CGSCC-NEXT: store i32 1, i32* [[B]], align 4
; CGSCC-NEXT: br label [[RET]]
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%d = icmp eq i32* %c, null
br i1 %d, label %t, label %f
t:
store i32 0, i32* %a
br label %ret
f:
store i32 1, i32* %b
br label %ret
ret:
ret void
}
define void @arg_nonnull_12_noundef_2(i32* nonnull %a, i32* noundef nonnull %b, i32* %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_12_noundef_2
; TUNIT-SAME: (i32* nocapture nofree nonnull writeonly [[A:%.*]], i32* nocapture nofree noundef nonnull writeonly [[B:%.*]], i32* nofree writeonly [[C:%.*]]) #[[ATTR6]] {
; TUNIT-NEXT: [[D:%.*]] = icmp eq i32* [[C]], null
; TUNIT-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: store i32 0, i32* [[A]], align 4
; TUNIT-NEXT: br label [[RET:%.*]]
; TUNIT: f:
; TUNIT-NEXT: store i32 1, i32* [[B]], align 4
; TUNIT-NEXT: br label [[RET]]
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_12_noundef_2
; CGSCC-SAME: (i32* nocapture nofree nonnull writeonly [[A:%.*]], i32* nocapture nofree noundef nonnull writeonly [[B:%.*]], i32* nofree writeonly [[C:%.*]]) #[[ATTR9]] {
; CGSCC-NEXT: [[D:%.*]] = icmp eq i32* [[C]], null
; CGSCC-NEXT: br i1 [[D]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: store i32 0, i32* [[A]], align 4
; CGSCC-NEXT: br label [[RET:%.*]]
; CGSCC: f:
; CGSCC-NEXT: store i32 1, i32* [[B]], align 4
; CGSCC-NEXT: br label [[RET]]
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%d = icmp eq i32* %c, null
br i1 %d, label %t, label %f
t:
store i32 0, i32* %a
br label %ret
f:
store i32 1, i32* %b
br label %ret
ret:
ret void
}
; Pass null directly to argument with nonnull attribute
define void @arg_nonnull_violation1_1() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation1_1
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation1_1
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
call void @arg_nonnull_1(i32* null)
ret void
}
define void @arg_nonnull_violation1_2() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation1_2
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation1_2
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
call void @arg_nonnull_1_noundef_1(i32* null)
ret void
}
; A case that depends on value simplification
define void @arg_nonnull_violation2_1(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation2_1
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation2_1
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
%null = getelementptr i32, i32* null, i32 0
%mustnull = select i1 %c, i32* null, i32* %null
call void @arg_nonnull_1(i32* %mustnull)
ret void
}
define void @arg_nonnull_violation2_2(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation2_2
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: unreachable
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation2_2
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
%null = getelementptr i32, i32* null, i32 0
%mustnull = select i1 %c, i32* null, i32* %null
call void @arg_nonnull_1_noundef_1(i32* %mustnull)
ret void
}
; Cases for single and multiple violation at a callsite
define void @arg_nonnull_violation3_1(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation3_1
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: [[PTR:%.*]] = alloca i32, align 4
; TUNIT-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR7:[0-9]+]]
; TUNIT-NEXT: call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR7]]
; TUNIT-NEXT: unreachable
; TUNIT: f:
; TUNIT-NEXT: unreachable
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation3_1
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CGSCC-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR11:[0-9]+]]
; CGSCC-NEXT: call void @arg_nonnull_12(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR11]]
; CGSCC-NEXT: unreachable
; CGSCC: f:
; CGSCC-NEXT: unreachable
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%ptr = alloca i32
br i1 %c, label %t, label %f
t:
call void @arg_nonnull_12(i32* %ptr, i32* %ptr, i32* %ptr)
call void @arg_nonnull_12(i32* %ptr, i32* %ptr, i32* null)
call void @arg_nonnull_12(i32* %ptr, i32* null, i32* %ptr)
call void @arg_nonnull_12(i32* %ptr, i32* null, i32* null)
br label %ret
f:
call void @arg_nonnull_12(i32* null, i32* %ptr, i32* %ptr)
call void @arg_nonnull_12(i32* null, i32* %ptr, i32* null)
call void @arg_nonnull_12(i32* null, i32* null, i32* %ptr)
call void @arg_nonnull_12(i32* null, i32* null, i32* null)
br label %ret
ret:
ret void
}
define void @arg_nonnull_violation3_2(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@arg_nonnull_violation3_2
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: [[PTR:%.*]] = alloca i32, align 4
; TUNIT-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; TUNIT: t:
; TUNIT-NEXT: call void @arg_nonnull_12_noundef_2(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR7]]
; TUNIT-NEXT: call void @arg_nonnull_12_noundef_2(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR7]]
; TUNIT-NEXT: unreachable
; TUNIT: f:
; TUNIT-NEXT: unreachable
; TUNIT: ret:
; TUNIT-NEXT: ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@arg_nonnull_violation3_2
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CGSCC-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; CGSCC: t:
; CGSCC-NEXT: call void @arg_nonnull_12_noundef_2(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]]) #[[ATTR11]]
; CGSCC-NEXT: call void @arg_nonnull_12_noundef_2(i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* nocapture nofree noundef nonnull writeonly align 4 dereferenceable(4) [[PTR]], i32* noalias nocapture nofree noundef writeonly align 4294967296 null) #[[ATTR11]]
; CGSCC-NEXT: unreachable
; CGSCC: f:
; CGSCC-NEXT: unreachable
; CGSCC: ret:
; CGSCC-NEXT: ret void
;
%ptr = alloca i32
br i1 %c, label %t, label %f
t:
call void @arg_nonnull_12_noundef_2(i32* %ptr, i32* %ptr, i32* %ptr)
call void @arg_nonnull_12_noundef_2(i32* %ptr, i32* %ptr, i32* null)
call void @arg_nonnull_12_noundef_2(i32* %ptr, i32* null, i32* %ptr)
call void @arg_nonnull_12_noundef_2(i32* %ptr, i32* null, i32* null)
br label %ret
f:
call void @arg_nonnull_12_noundef_2(i32* null, i32* %ptr, i32* %ptr)
call void @arg_nonnull_12_noundef_2(i32* null, i32* %ptr, i32* null)
call void @arg_nonnull_12_noundef_2(i32* null, i32* null, i32* %ptr)
call void @arg_nonnull_12_noundef_2(i32* null, i32* null, i32* null)
br label %ret
ret:
ret void
}
; Tests for returned position
define nonnull i32* @returned_nonnnull(i32 %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_nonnnull
; CHECK-SAME: (i32 [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: switch i32 [[C]], label [[ONDEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[ONZERO:%.*]]
; CHECK-NEXT: i32 1, label [[ONONE:%.*]]
; CHECK-NEXT: ]
; CHECK: onzero:
; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: ret i32* [[PTR]]
; CHECK: onone:
; CHECK-NEXT: ret i32* null
; CHECK: ondefault:
; CHECK-NEXT: ret i32* undef
;
switch i32 %c, label %ondefault [ i32 0, label %onzero
i32 1, label %onone ]
onzero:
%ptr = alloca i32
ret i32* %ptr
onone:
ret i32* null
ondefault:
ret i32* undef
}
define noundef i32* @returned_noundef(i32 %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_noundef
; CHECK-SAME: (i32 [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: switch i32 [[C]], label [[ONDEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[ONZERO:%.*]]
; CHECK-NEXT: i32 1, label [[ONONE:%.*]]
; CHECK-NEXT: ]
; CHECK: onzero:
; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: ret i32* [[PTR]]
; CHECK: onone:
; CHECK-NEXT: ret i32* null
; CHECK: ondefault:
; CHECK-NEXT: unreachable
;
switch i32 %c, label %ondefault [ i32 0, label %onzero
i32 1, label %onone ]
onzero:
%ptr = alloca i32
ret i32* %ptr
onone:
ret i32* null
ondefault:
ret i32* undef
}
define nonnull noundef i32* @returned_nonnnull_noundef(i32 %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_nonnnull_noundef
; CHECK-SAME: (i32 [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: switch i32 [[C]], label [[ONDEFAULT:%.*]] [
; CHECK-NEXT: i32 0, label [[ONZERO:%.*]]
; CHECK-NEXT: i32 1, label [[ONONE:%.*]]
; CHECK-NEXT: ]
; CHECK: onzero:
; CHECK-NEXT: [[PTR:%.*]] = alloca i32, align 4
; CHECK-NEXT: ret i32* [[PTR]]
; CHECK: onone:
; CHECK-NEXT: unreachable
; CHECK: ondefault:
; CHECK-NEXT: unreachable
;
switch i32 %c, label %ondefault [ i32 0, label %onzero
i32 1, label %onone ]
onzero:
%ptr = alloca i32
ret i32* %ptr
onone:
ret i32* null
ondefault:
ret i32* undef
}
define noundef i32 @returned_nonnnull_noundef_int() {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@returned_nonnnull_noundef_int
; CHECK-SAME: () #[[ATTR0]] {
; CHECK-NEXT: ret i32 0
;
ret i32 0
}
declare void @callee_int_arg(i32)
define void @callsite_noundef_1() {
; CHECK-LABEL: define {{[^@]+}}@callsite_noundef_1() {
; CHECK-NEXT: call void @callee_int_arg(i32 noundef 0)
; CHECK-NEXT: ret void
;
call void @callee_int_arg(i32 noundef 0)
ret void
}
declare void @callee_ptr_arg(i32*)
define void @callsite_noundef_2() {
; CHECK-LABEL: define {{[^@]+}}@callsite_noundef_2() {
; CHECK-NEXT: unreachable
;
call void @callee_ptr_arg(i32* noundef undef)
ret void
}
define i32 @argument_noundef1(i32 noundef %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@argument_noundef1
; CHECK-SAME: (i32 noundef returned [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: ret i32 [[C]]
;
ret i32 %c
}
define i32 @violate_noundef_nonpointer() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@violate_noundef_nonpointer
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: ret i32 undef
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@violate_noundef_nonpointer
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: unreachable
;
%ret = call i32 @argument_noundef1(i32 undef)
ret i32 %ret
}
define i32* @argument_noundef2(i32* noundef %c) {
; CHECK: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@argument_noundef2
; CHECK-SAME: (i32* nofree noundef readnone returned "no-capture-maybe-returned" [[C:%.*]]) #[[ATTR0]] {
; CHECK-NEXT: ret i32* [[C]]
;
ret i32* %c
}
define i32* @violate_noundef_pointer() {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@violate_noundef_pointer
; TUNIT-SAME: () #[[ATTR0]] {
; TUNIT-NEXT: ret i32* undef
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@violate_noundef_pointer
; CGSCC-SAME: () #[[ATTR2]] {
; CGSCC-NEXT: ret i32* undef
;
%ret = call i32* @argument_noundef2(i32* undef)
ret i32* %ret
}
define internal noundef i32 @assumed_undef_is_ok(i1 %c, i32 %arg) {
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@assumed_undef_is_ok
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: br i1 [[C]], label [[REC:%.*]], label [[RET:%.*]]
; CGSCC: rec:
; CGSCC-NEXT: br label [[RET]]
; CGSCC: ret:
; CGSCC-NEXT: ret i32 0
;
%stack = alloca i32
store i32 %arg, i32* %stack
br i1 %c, label %rec, label %ret
rec:
%call = call i32 @assumed_undef_is_ok(i1 false, i32 0)
store i32 %call, i32* %stack
br label %ret
ret:
%l = load i32, i32* %stack
ret i32 %l
}
define noundef i32 @assumed_undef_is_ok_caller(i1 %c) {
; TUNIT: Function Attrs: nofree norecurse nosync nounwind willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@assumed_undef_is_ok_caller
; TUNIT-SAME: (i1 [[C:%.*]]) #[[ATTR0]] {
; TUNIT-NEXT: ret i32 0
;
; CGSCC: Function Attrs: nofree nosync nounwind willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@assumed_undef_is_ok_caller
; CGSCC-SAME: (i1 [[C:%.*]]) #[[ATTR2]] {
; CGSCC-NEXT: [[CALL:%.*]] = call i32 @assumed_undef_is_ok(i1 [[C]]) #[[ATTR10]]
; CGSCC-NEXT: ret i32 [[CALL]]
;
%call = call i32 @assumed_undef_is_ok(i1 %c, i32 undef)
ret i32 %call
}
;.
; TUNIT: attributes #[[ATTR0]] = { nofree norecurse nosync nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR1]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none) }
; TUNIT: attributes #[[ATTR2]] = { nofree norecurse nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR3]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write) }
; TUNIT: attributes #[[ATTR4]] = { nofree norecurse nounwind null_pointer_is_valid willreturn }
; TUNIT: attributes #[[ATTR5]] = { nofree norecurse noreturn nosync nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR6]] = { nofree norecurse nosync nounwind willreturn memory(argmem: write) }
; TUNIT: attributes #[[ATTR7]] = { nofree nosync nounwind willreturn }
;.
; CGSCC: attributes #[[ATTR0]] = { nofree norecurse nosync nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR1]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none) }
; CGSCC: attributes #[[ATTR2]] = { nofree nosync nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR3]] = { nofree norecurse nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR4]] = { nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(write) }
; CGSCC: attributes #[[ATTR5]] = { nofree nosync nounwind willreturn memory(write) }
; CGSCC: attributes #[[ATTR6]] = { nofree norecurse nounwind null_pointer_is_valid willreturn }
; CGSCC: attributes #[[ATTR7]] = { nofree nounwind willreturn }
; CGSCC: attributes #[[ATTR8]] = { nofree norecurse noreturn nosync nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR9]] = { nofree norecurse nosync nounwind willreturn memory(argmem: write) }
; CGSCC: attributes #[[ATTR10]] = { willreturn }
; CGSCC: attributes #[[ATTR11]] = { nounwind willreturn }
;.
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