mirror of
https://github.com/c64scene-ar/llvm-6502.git
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a4bdf2ea48
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121945 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
1.6 KiB
LLVM
67 lines
1.6 KiB
LLVM
; RUN: opt < %s -tbaa -basicaa -dse -S | FileCheck %s
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; DSE should make use of TBAA.
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; CHECK: @test0_yes
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; CHECK-NEXT: load i8* %b
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; CHECK-NEXT: store i8 1, i8* %a
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; CHECK-NEXT: ret i8 %y
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define i8 @test0_yes(i8* %a, i8* %b) nounwind {
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store i8 0, i8* %a, !tbaa !1
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%y = load i8* %b, !tbaa !2
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store i8 1, i8* %a, !tbaa !1
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ret i8 %y
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}
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; CHECK: @test0_no
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; CHECK-NEXT: store i8 0, i8* %a
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; CHECK-NEXT: load i8* %b
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; CHECK-NEXT: store i8 1, i8* %a
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; CHECK-NEXT: ret i8 %y
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define i8 @test0_no(i8* %a, i8* %b) nounwind {
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store i8 0, i8* %a, !tbaa !3
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%y = load i8* %b, !tbaa !4
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store i8 1, i8* %a, !tbaa !3
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ret i8 %y
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}
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; CHECK: @test1_yes
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; CHECK-NEXT: load i8* %b
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; CHECK-NEXT: store i8 1, i8* %a
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; CHECK-NEXT: ret i8 %y
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define i8 @test1_yes(i8* %a, i8* %b) nounwind {
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store i8 0, i8* %a
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%y = load i8* %b, !tbaa !5
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store i8 1, i8* %a
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ret i8 %y
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}
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; CHECK: @test1_no
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; CHECK-NEXT: store i8 0, i8* %a
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; CHECK-NEXT: load i8* %b
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; CHECK-NEXT: store i8 1, i8* %a
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; CHECK-NEXT: ret i8 %y
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define i8 @test1_no(i8* %a, i8* %b) nounwind {
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store i8 0, i8* %a
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%y = load i8* %b, !tbaa !6
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store i8 1, i8* %a
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ret i8 %y
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}
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; Root note.
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!0 = metadata !{ }
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; Some type.
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!1 = metadata !{ metadata !"foo", metadata !0 }
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; Some other non-aliasing type.
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!2 = metadata !{ metadata !"bar", metadata !0 }
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; Some type.
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!3 = metadata !{ metadata !"foo", metadata !0 }
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; Some type in a different type system.
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!4 = metadata !{ metadata !"bar", metadata !"different" }
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; Invariant memory.
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!5 = metadata !{ metadata !"qux", metadata !0, i1 1 }
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; Not invariant memory.
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!6 = metadata !{ metadata !"qux", metadata !0, i1 0 }
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