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|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
; RUN: opt -attributor -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=5 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=5 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
; RUN: opt -attributor-cgscc -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_NPM,IS__CGSCC____,IS________OPM,IS__CGSCC_OPM
; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_OPM,IS__CGSCC____,IS________NPM,IS__CGSCC_NPM
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-LABEL: define {{[^@]+}}@load_wholly_unreachable()
; CHECK-NEXT: unreachable
;
%a = load i32, i32* null
ret void
}
define void @loads_wholly_unreachable() {
; CHECK-LABEL: define {{[^@]+}}@loads_wholly_unreachable()
; CHECK-NEXT: unreachable
;
%a = load i32, i32* null
%b = load i32, i32* null
ret void
}
define void @load_single_bb_unreachable(i1 %cond) {
; CHECK-LABEL: define {{[^@]+}}@load_single_bb_unreachable
; CHECK-SAME: (i1 [[COND:%.*]])
; 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-LABEL: define {{[^@]+}}@load_null_pointer_is_defined()
; CHECK-NEXT: ret void
;
%a = load i32, i32* null
ret void
}
define internal i32* @ret_null() {
; IS__CGSCC____-LABEL: define {{[^@]+}}@ret_null()
; IS__CGSCC____-NEXT: ret i32* null
;
ret i32* null
}
define void @load_null_propagated() {
; CHECK-LABEL: define {{[^@]+}}@load_null_propagated()
; CHECK-NEXT: unreachable
;
%ptr = call i32* @ret_null()
%a = load i32, i32* %ptr
ret void
}
; -- Store tests --
define void @store_wholly_unreachable() {
; CHECK-LABEL: define {{[^@]+}}@store_wholly_unreachable()
; CHECK-NEXT: unreachable
;
store i32 5, i32* null
ret void
}
define void @store_single_bb_unreachable(i1 %cond) {
; CHECK-LABEL: define {{[^@]+}}@store_single_bb_unreachable
; CHECK-SAME: (i1 [[COND:%.*]])
; 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 {
; CHECK-LABEL: define {{[^@]+}}@store_null_pointer_is_defined()
; CHECK-NEXT: store i32 5, i32* null, align 536870912
; CHECK-NEXT: ret void
;
store i32 5, i32* null
ret void
}
define void @store_null_propagated() {
; ATTRIBUTOR-LABEL: @store_null_propagated(
; ATTRIBUTOR-NEXT: unreachable
;
; CHECK-LABEL: define {{[^@]+}}@store_null_propagated()
; CHECK-NEXT: unreachable
;
%ptr = call i32* @ret_null()
store i32 5, i32* %ptr
ret void
}
; -- AtomicRMW tests --
define void @atomicrmw_wholly_unreachable() {
; CHECK-LABEL: define {{[^@]+}}@atomicrmw_wholly_unreachable()
; CHECK-NEXT: unreachable
;
%a = atomicrmw add i32* null, i32 1 acquire
ret void
}
define void @atomicrmw_single_bb_unreachable(i1 %cond) {
; CHECK-LABEL: define {{[^@]+}}@atomicrmw_single_bb_unreachable
; CHECK-SAME: (i1 [[COND:%.*]])
; 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:
%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 {
; CHECK-LABEL: define {{[^@]+}}@atomicrmw_null_pointer_is_defined()
; CHECK-NEXT: [[A:%.*]] = atomicrmw add i32* null, i32 1 acquire
; CHECK-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
;
; CHECK-LABEL: define {{[^@]+}}@atomicrmw_null_propagated()
; CHECK-NEXT: unreachable
;
%ptr = call i32* @ret_null()
%a = atomicrmw add i32* %ptr, i32 1 acquire
ret void
}
; -- AtomicCmpXchg tests --
define void @atomiccmpxchg_wholly_unreachable() {
; CHECK-LABEL: define {{[^@]+}}@atomiccmpxchg_wholly_unreachable()
; CHECK-NEXT: unreachable
;
%a = cmpxchg i32* null, i32 2, i32 3 acq_rel monotonic
ret void
}
define void @atomiccmpxchg_single_bb_unreachable(i1 %cond) {
; CHECK-LABEL: define {{[^@]+}}@atomiccmpxchg_single_bb_unreachable
; CHECK-SAME: (i1 [[COND:%.*]])
; 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:
%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 {
; CHECK-LABEL: define {{[^@]+}}@atomiccmpxchg_null_pointer_is_defined()
; CHECK-NEXT: [[A:%.*]] = cmpxchg i32* null, i32 2, i32 3 acq_rel monotonic
; CHECK-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
;
; CHECK-LABEL: define {{[^@]+}}@atomiccmpxchg_null_propagated()
; CHECK-NEXT: unreachable
;
%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() {
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef()
; CHECK-NEXT: unreachable
; CHECK: t:
; CHECK-NEXT: unreachable
; CHECK: e:
; CHECK-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-LABEL: define {{[^@]+}}@cond_br_on_undef2
; CHECK-SAME: (i1 [[COND:%.*]])
; 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-LABEL: define {{[^@]+}}@ret_undef()
; CHECK-NEXT: ret i1 undef
;
ret i1 undef
}
define void @cond_br_on_undef_interproc() {
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc()
; CHECK-NEXT: unreachable
; CHECK: t:
; CHECK-NEXT: unreachable
; CHECK: e:
; CHECK-NEXT: unreachable
;
%cond = call i1 @ret_undef()
br i1 %cond, label %t, label %e
t:
ret void
e:
ret void
}
define i1 @ret_undef2() {
; CHECK-LABEL: define {{[^@]+}}@ret_undef2()
; 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() {
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef_interproc2()
; CHECK-NEXT: unreachable
; CHECK: t:
; CHECK-NEXT: unreachable
; CHECK: e:
; CHECK-NEXT: unreachable
;
%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-LABEL: define {{[^@]+}}@cond_br_on_undef3()
; CHECK-NEXT: br label [[T:%.*]]
; CHECK: t:
; CHECK-NEXT: ret i32 1
; CHECK: e:
; CHECK-NEXT: unreachable
;
%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() {
; CHECK-LABEL: define {{[^@]+}}@cond_br_on_undef_uninit()
; CHECK-NEXT: [[ALLOC:%.*]] = alloca i1, align 1
; CHECK-NEXT: [[COND:%.*]] = load i1, i1* [[ALLOC]], align 1
; CHECK-NEXT: br i1 [[COND]], label [[T:%.*]], label [[E:%.*]]
; CHECK: t:
; CHECK-NEXT: ret i32 1
; CHECK: e:
; CHECK-NEXT: ret i32 2
;
%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) {
;
; IS__CGSCC____-LABEL: define {{[^@]+}}@callee()
; IS__CGSCC____-NEXT: entry:
; IS__CGSCC____-NEXT: unreachable
; IS__CGSCC____: T:
; IS__CGSCC____-NEXT: unreachable
; IS__CGSCC____: F:
; IS__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() {
; CHECK-LABEL: define {{[^@]+}}@foo()
; CHECK-NEXT: ret i32 1
;
%X = call i32 @callee(i1 false, i32* null)
ret i32 %X
}
|
