llvm-6502/test/Bitcode/attributes.ll
Sanjoy Das 5ff5907996 [IR] Introduce a dereferenceable_or_null(N) attribute.
Summary:
If a pointer is marked as dereferenceable_or_null(N), LLVM assumes it
is either `null` or `dereferenceable(N)` or both.  This change only
introduces the attribute and adds a token test case for the `llvm-as`
/ `llvm-dis`.  It does not hook up other parts of the optimizer to
actually exploit the attribute -- those changes will come later.

For pointers in address space 0, `dereferenceable(N)` is now exactly
equivalent to `dereferenceable_or_null(N)` && `nonnull`.  For other
address spaces, `dereferenceable(N)` is potentially weaker than
`dereferenceable_or_null(N)` && `nonnull` (since we could have a null
`dereferenceable(N)` pointer).

The motivating case for this change is Java (and other managed
languages), where pointers are either `null` or dereferenceable up to
some usually known-at-compile-time constant offset.

Reviewers: rafael, hfinkel

Reviewed By: hfinkel

Subscribers: nicholas, llvm-commits

Differential Revision: http://reviews.llvm.org/D8650

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235132 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-16 20:29:50 +00:00

280 lines
5.2 KiB
LLVM

; RUN: llvm-as < %s | llvm-dis | FileCheck %s
; RUN: verify-uselistorder < %s
; PR12696
define void @f1(i8 zeroext)
; CHECK: define void @f1(i8 zeroext)
{
ret void;
}
define void @f2(i8 signext)
; CHECK: define void @f2(i8 signext)
{
ret void;
}
define void @f3() noreturn
; CHECK: define void @f3() #0
{
ret void;
}
define void @f4(i8 inreg)
; CHECK: define void @f4(i8 inreg)
{
ret void;
}
define void @f5(i8* sret)
; CHECK: define void @f5(i8* sret)
{
ret void;
}
define void @f6() nounwind
; CHECK: define void @f6() #1
{
ret void;
}
define void @f7(i8* noalias)
; CHECK: define void @f7(i8* noalias)
{
ret void;
}
define void @f8(i8* byval)
; CHECK: define void @f8(i8* byval)
{
ret void;
}
define void @f9(i8* nest)
; CHECK: define void @f9(i8* nest)
{
ret void;
}
define void @f10() readnone
; CHECK: define void @f10() #2
{
ret void;
}
define void @f11() readonly
; CHECK: define void @f11() #3
{
ret void;
}
define void @f12() noinline
; CHECK: define void @f12() #4
{
ret void;
}
define void @f13() alwaysinline
; CHECK: define void @f13() #5
{
ret void;
}
define void @f14() optsize
; CHECK: define void @f14() #6
{
ret void;
}
define void @f15() ssp
; CHECK: define void @f15() #7
{
ret void;
}
define void @f16() sspreq
; CHECK: define void @f16() #8
{
ret void;
}
define void @f17(i8 align 4)
; CHECK: define void @f17(i8 align 4)
{
ret void;
}
define void @f18(i8* nocapture)
; CHECK: define void @f18(i8* nocapture)
{
ret void;
}
define void @f19() noredzone
; CHECK: define void @f19() #9
{
ret void;
}
define void @f20() noimplicitfloat
; CHECK: define void @f20() #10
{
ret void;
}
define void @f21() naked
; CHECK: define void @f21() #11
{
ret void;
}
define void @f22() inlinehint
; CHECK: define void @f22() #12
{
ret void;
}
define void @f23() alignstack(4)
; CHECK: define void @f23() #13
{
ret void;
}
define void @f24() returns_twice
; CHECK: define void @f24() #14
{
ret void;
}
define void @f25() uwtable
; CHECK: define void @f25() #15
{
ret void;
}
define void @f26() nonlazybind
; CHECK: define void @f26() #16
{
ret void;
}
define void @f27() sanitize_address
; CHECK: define void @f27() #17
{
ret void;
}
define void @f28() sanitize_thread
; CHECK: define void @f28() #18
{
ret void;
}
define void @f29() sanitize_memory
; CHECK: define void @f29() #19
{
ret void;
}
define void @f30() "cpu"="cortex-a8"
; CHECK: define void @f30() #20
{
ret void;
}
define i8 @f31(i8 returned %A)
; CHECK: define i8 @f31(i8 returned %A)
{
ret i8 %A;
}
define void @f32() sspstrong
; CHECK: define void @f32() #21
{
ret void;
}
define void @f33() minsize
; CHECK: define void @f33() #22
{
ret void;
}
declare void @nobuiltin()
define void @f34()
; CHECK: define void @f34()
{
call void @nobuiltin() nobuiltin
; CHECK: call void @nobuiltin() #25
ret void;
}
define void @f35() optnone noinline
; CHECK: define void @f35() #23
{
ret void;
}
define void @f36(i8* inalloca) {
; CHECK: define void @f36(i8* inalloca) {
ret void
}
define nonnull i8* @f37(i8* nonnull %a) {
; CHECK: define nonnull i8* @f37(i8* nonnull %a) {
ret i8* %a
}
define void @f38() unnamed_addr jumptable {
; CHECK: define void @f38() unnamed_addr #24
call void bitcast (void (i8*)* @f36 to void ()*)()
unreachable
}
define dereferenceable(2) i8* @f39(i8* dereferenceable(1) %a) {
; CHECK: define dereferenceable(2) i8* @f39(i8* dereferenceable(1) %a) {
ret i8* %a
}
define dereferenceable(18446744073709551606) i8* @f40(i8* dereferenceable(18446744073709551615) %a) {
; CHECK: define dereferenceable(18446744073709551606) i8* @f40(i8* dereferenceable(18446744073709551615) %a) {
ret i8* %a
}
define void @f41(i8* align 32, double* align 64) {
; CHECK: define void @f41(i8* align 32, double* align 64) {
ret void
}
; CHECK: define dereferenceable_or_null(8) i8* @f42(i8* dereferenceable_or_null(8) %foo)
define dereferenceable_or_null(8) i8* @f42(i8* dereferenceable_or_null(8) %foo) {
entry:
ret i8* %foo
}
; CHECK: attributes #0 = { noreturn }
; CHECK: attributes #1 = { nounwind }
; CHECK: attributes #2 = { readnone }
; CHECK: attributes #3 = { readonly }
; CHECK: attributes #4 = { noinline }
; CHECK: attributes #5 = { alwaysinline }
; CHECK: attributes #6 = { optsize }
; CHECK: attributes #7 = { ssp }
; CHECK: attributes #8 = { sspreq }
; CHECK: attributes #9 = { noredzone }
; CHECK: attributes #10 = { noimplicitfloat }
; CHECK: attributes #11 = { naked }
; CHECK: attributes #12 = { inlinehint }
; CHECK: attributes #13 = { alignstack=4 }
; CHECK: attributes #14 = { returns_twice }
; CHECK: attributes #15 = { uwtable }
; CHECK: attributes #16 = { nonlazybind }
; CHECK: attributes #17 = { sanitize_address }
; CHECK: attributes #18 = { sanitize_thread }
; CHECK: attributes #19 = { sanitize_memory }
; CHECK: attributes #20 = { "cpu"="cortex-a8" }
; CHECK: attributes #21 = { sspstrong }
; CHECK: attributes #22 = { minsize }
; CHECK: attributes #23 = { noinline optnone }
; CHECK: attributes #24 = { jumptable }
; CHECK: attributes #25 = { nobuiltin }