mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-30 16:17:05 +00:00
5ff5907996
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
280 lines
5.2 KiB
LLVM
280 lines
5.2 KiB
LLVM
; RUN: llvm-as < %s | llvm-dis | FileCheck %s
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; RUN: verify-uselistorder < %s
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; PR12696
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define void @f1(i8 zeroext)
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; CHECK: define void @f1(i8 zeroext)
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{
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ret void;
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}
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define void @f2(i8 signext)
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; CHECK: define void @f2(i8 signext)
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{
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ret void;
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}
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define void @f3() noreturn
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; CHECK: define void @f3() #0
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{
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ret void;
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}
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define void @f4(i8 inreg)
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; CHECK: define void @f4(i8 inreg)
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{
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ret void;
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}
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define void @f5(i8* sret)
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; CHECK: define void @f5(i8* sret)
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{
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ret void;
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}
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define void @f6() nounwind
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; CHECK: define void @f6() #1
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{
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ret void;
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}
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define void @f7(i8* noalias)
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; CHECK: define void @f7(i8* noalias)
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{
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ret void;
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}
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define void @f8(i8* byval)
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; CHECK: define void @f8(i8* byval)
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{
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ret void;
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}
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define void @f9(i8* nest)
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; CHECK: define void @f9(i8* nest)
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{
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ret void;
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}
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define void @f10() readnone
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; CHECK: define void @f10() #2
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{
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ret void;
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}
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define void @f11() readonly
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; CHECK: define void @f11() #3
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{
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ret void;
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}
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define void @f12() noinline
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; CHECK: define void @f12() #4
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{
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ret void;
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}
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define void @f13() alwaysinline
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; CHECK: define void @f13() #5
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{
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ret void;
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}
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define void @f14() optsize
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; CHECK: define void @f14() #6
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{
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ret void;
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}
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define void @f15() ssp
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; CHECK: define void @f15() #7
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{
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ret void;
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}
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define void @f16() sspreq
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; CHECK: define void @f16() #8
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{
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ret void;
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}
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define void @f17(i8 align 4)
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; CHECK: define void @f17(i8 align 4)
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{
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ret void;
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}
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define void @f18(i8* nocapture)
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; CHECK: define void @f18(i8* nocapture)
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{
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ret void;
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}
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define void @f19() noredzone
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; CHECK: define void @f19() #9
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{
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ret void;
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}
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define void @f20() noimplicitfloat
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; CHECK: define void @f20() #10
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{
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ret void;
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}
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define void @f21() naked
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; CHECK: define void @f21() #11
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{
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ret void;
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}
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define void @f22() inlinehint
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; CHECK: define void @f22() #12
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{
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ret void;
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}
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define void @f23() alignstack(4)
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; CHECK: define void @f23() #13
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{
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ret void;
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}
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define void @f24() returns_twice
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; CHECK: define void @f24() #14
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{
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ret void;
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}
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define void @f25() uwtable
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; CHECK: define void @f25() #15
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{
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ret void;
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}
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define void @f26() nonlazybind
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; CHECK: define void @f26() #16
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{
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ret void;
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}
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define void @f27() sanitize_address
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; CHECK: define void @f27() #17
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{
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ret void;
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}
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define void @f28() sanitize_thread
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; CHECK: define void @f28() #18
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{
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ret void;
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}
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define void @f29() sanitize_memory
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; CHECK: define void @f29() #19
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{
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ret void;
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}
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define void @f30() "cpu"="cortex-a8"
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; CHECK: define void @f30() #20
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{
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ret void;
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}
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define i8 @f31(i8 returned %A)
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; CHECK: define i8 @f31(i8 returned %A)
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{
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ret i8 %A;
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}
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define void @f32() sspstrong
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; CHECK: define void @f32() #21
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{
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ret void;
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}
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define void @f33() minsize
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; CHECK: define void @f33() #22
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{
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ret void;
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}
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declare void @nobuiltin()
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define void @f34()
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; CHECK: define void @f34()
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{
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call void @nobuiltin() nobuiltin
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; CHECK: call void @nobuiltin() #25
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ret void;
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}
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define void @f35() optnone noinline
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; CHECK: define void @f35() #23
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{
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ret void;
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}
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define void @f36(i8* inalloca) {
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; CHECK: define void @f36(i8* inalloca) {
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ret void
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}
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define nonnull i8* @f37(i8* nonnull %a) {
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; CHECK: define nonnull i8* @f37(i8* nonnull %a) {
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ret i8* %a
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}
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define void @f38() unnamed_addr jumptable {
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; CHECK: define void @f38() unnamed_addr #24
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call void bitcast (void (i8*)* @f36 to void ()*)()
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unreachable
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}
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define dereferenceable(2) i8* @f39(i8* dereferenceable(1) %a) {
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; CHECK: define dereferenceable(2) i8* @f39(i8* dereferenceable(1) %a) {
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ret i8* %a
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}
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define dereferenceable(18446744073709551606) i8* @f40(i8* dereferenceable(18446744073709551615) %a) {
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; CHECK: define dereferenceable(18446744073709551606) i8* @f40(i8* dereferenceable(18446744073709551615) %a) {
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ret i8* %a
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}
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define void @f41(i8* align 32, double* align 64) {
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; CHECK: define void @f41(i8* align 32, double* align 64) {
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ret void
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}
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; CHECK: define dereferenceable_or_null(8) i8* @f42(i8* dereferenceable_or_null(8) %foo)
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define dereferenceable_or_null(8) i8* @f42(i8* dereferenceable_or_null(8) %foo) {
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entry:
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ret i8* %foo
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}
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; CHECK: attributes #0 = { noreturn }
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; CHECK: attributes #1 = { nounwind }
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; CHECK: attributes #2 = { readnone }
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; CHECK: attributes #3 = { readonly }
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; CHECK: attributes #4 = { noinline }
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; CHECK: attributes #5 = { alwaysinline }
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; CHECK: attributes #6 = { optsize }
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; CHECK: attributes #7 = { ssp }
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; CHECK: attributes #8 = { sspreq }
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; CHECK: attributes #9 = { noredzone }
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; CHECK: attributes #10 = { noimplicitfloat }
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; CHECK: attributes #11 = { naked }
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; CHECK: attributes #12 = { inlinehint }
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; CHECK: attributes #13 = { alignstack=4 }
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; CHECK: attributes #14 = { returns_twice }
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; CHECK: attributes #15 = { uwtable }
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; CHECK: attributes #16 = { nonlazybind }
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; CHECK: attributes #17 = { sanitize_address }
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; CHECK: attributes #18 = { sanitize_thread }
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; CHECK: attributes #19 = { sanitize_memory }
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; CHECK: attributes #20 = { "cpu"="cortex-a8" }
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; CHECK: attributes #21 = { sspstrong }
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; CHECK: attributes #22 = { minsize }
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; CHECK: attributes #23 = { noinline optnone }
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; CHECK: attributes #24 = { jumptable }
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; CHECK: attributes #25 = { nobuiltin }
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