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https://github.com/c64scene-ar/llvm-6502.git
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9e81c3bdb2
Remove the command line argument "struct-path-tbaa" since we should not depend on command line argument to decide which format the IR file is using. Instead, we check the first operand of the tbaa tag node, if it is a MDNode, we treat it as struct-path aware TBAA format, otherwise, we treat it as scalar TBAA format. When clang starts to use struct-path aware TBAA format no matter whether struct-path-tbaa is no, and we can auto-upgrade existing bc files, the support for scalar TBAA format can be dropped. Existing testing cases are updated to use the struct-path aware TBAA format. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191538 91177308-0d34-0410-b5e6-96231b3b80d8
87 lines
2.7 KiB
LLVM
87 lines
2.7 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 = metadata !{ }
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; Invariant memory.
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!1 = metadata !{metadata !3, metadata !3, i64 0, i1 1 }
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; Not invariant memory.
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!2 = metadata !{metadata !3, metadata !3, i64 0, i1 0 }
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!3 = metadata !{ metadata !"foo", metadata !0 }
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