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https://github.com/c64scene-ar/llvm-6502.git
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1ef70ff39b
Now that `Metadata` is typeless, reflect that in the assembly. These
are the matching assembly changes for the metadata/value split in
r223802.
- Only use the `metadata` type when referencing metadata from a call
intrinsic -- i.e., only when it's used as a `Value`.
- Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
when referencing it from call intrinsics.
So, assembly like this:
define @foo(i32 %v) {
call void @llvm.foo(metadata !{i32 %v}, metadata !0)
call void @llvm.foo(metadata !{i32 7}, metadata !0)
call void @llvm.foo(metadata !1, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{metadata !3}, metadata !0)
ret void, !bar !2
}
!0 = metadata !{metadata !2}
!1 = metadata !{i32* @global}
!2 = metadata !{metadata !3}
!3 = metadata !{}
turns into this:
define @foo(i32 %v) {
call void @llvm.foo(metadata i32 %v, metadata !0)
call void @llvm.foo(metadata i32 7, metadata !0)
call void @llvm.foo(metadata i32* @global, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{!3}, metadata !0)
ret void, !bar !2
}
!0 = !{!2}
!1 = !{i32* @global}
!2 = !{!3}
!3 = !{}
I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines). I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.
This is part of PR21532.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224257 91177308-0d34-0410-b5e6-96231b3b80d8
87 lines
2.6 KiB
LLVM
87 lines
2.6 KiB
LLVM
; RUN: opt < %s -tbaa -basicaa -functionattrs -S | FileCheck %s
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; FunctionAttrs should make use of TBAA.
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; Add the readnone attribute, since the only access is a store which TBAA
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; says is to constant memory.
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;
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; It's unusual to see a store to constant memory, but it isn't necessarily
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; invalid, as it's possible that this only happens after optimization on a
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; code path which isn't ever executed.
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; CHECK: define void @test0_yes(i32* nocapture %p) #0 {
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define void @test0_yes(i32* %p) nounwind {
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store i32 0, i32* %p, !tbaa !1
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ret void
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}
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; CHECK: define void @test0_no(i32* nocapture %p) #1 {
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define void @test0_no(i32* %p) nounwind {
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store i32 0, i32* %p, !tbaa !2
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ret void
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}
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; Add the readonly attribute, since there's just a call to a function which
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; TBAA says doesn't modify any memory.
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; CHECK: define void @test1_yes(i32* nocapture %p) #2 {
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define void @test1_yes(i32* %p) nounwind {
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call void @callee(i32* %p), !tbaa !1
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ret void
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}
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; CHECK: define void @test1_no(i32* %p) #1 {
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define void @test1_no(i32* %p) nounwind {
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call void @callee(i32* %p), !tbaa !2
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ret void
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}
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; Add the readonly attribute, as above, but this time BasicAA will say
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; that the function accesses memory through its arguments, which TBAA
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; still says that the function doesn't write to memory.
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;
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; This is unusual, since the function is memcpy, but as above, this
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; isn't necessarily invalid.
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; CHECK: define void @test2_yes(i8* nocapture %p, i8* nocapture %q, i64 %n) #0 {
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define void @test2_yes(i8* %p, i8* %q, i64 %n) nounwind {
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p, i8* %q, i64 %n, i32 1, i1 false), !tbaa !1
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ret void
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}
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; CHECK: define void @test2_no(i8* nocapture %p, i8* nocapture readonly %q, i64 %n) #1 {
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define void @test2_no(i8* %p, i8* %q, i64 %n) nounwind {
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p, i8* %q, i64 %n, i32 1, i1 false), !tbaa !2
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ret void
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}
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; Similar to the others, va_arg only accesses memory through its operand.
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; CHECK: define i32 @test3_yes(i8* nocapture %p) #0 {
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define i32 @test3_yes(i8* %p) nounwind {
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%t = va_arg i8* %p, i32, !tbaa !1
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ret i32 %t
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}
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; CHECK: define i32 @test3_no(i8* nocapture %p) #1 {
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define i32 @test3_no(i8* %p) nounwind {
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%t = va_arg i8* %p, i32, !tbaa !2
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ret i32 %t
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}
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declare void @callee(i32* %p) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i32, i1) nounwind
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; CHECK: attributes #0 = { nounwind readnone }
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; CHECK: attributes #1 = { nounwind }
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; CHECK: attributes #2 = { nounwind readonly }
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; Root note.
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!0 = !{ }
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; Invariant memory.
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!1 = !{!3, !3, i64 0, i1 1 }
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; Not invariant memory.
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!2 = !{!3, !3, i64 0, i1 0 }
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!3 = !{ !"foo", !0 }
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