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Require intervals in the range metadata to be in a canonical form: They must

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be non contiguous, non overlapping and sorted by the lower end.

While this is technically a backward incompatibility, every frontent currently
produces range metadata with a single interval and we don't have any pass
that merges intervals yet, so no existing bitcode files should be rejected by
this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157741 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2012-05-31 13:45:46 +00:00
parent 177cf1e1a3
commit c49b29ef5d
4 changed files with 74 additions and 2 deletions
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40
test/Verifier/range-1.ll
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@@ -76,3 +76,43 @@ entry:
}
!8 = metadata !{i8 0, i8 0}
; CHECK: Range must not be empty!
define i8 @f10(i8* %x) {
entry:
%y = load i8* %x, align 1, !range !9
ret i8 %y
}
!9 = metadata !{i8 0, i8 2, i8 1, i8 3}
; CHECK: Intervals are overlapping, contiguous or not in order
define i8 @f11(i8* %x) {
entry:
%y = load i8* %x, align 1, !range !10
ret i8 %y
}
!10 = metadata !{i8 0, i8 2, i8 2, i8 3}
; CHECK: Intervals are overlapping, contiguous or not in order
define i8 @f12(i8* %x) {
entry:
%y = load i8* %x, align 1, !range !11
ret i8 %y
}
!11 = metadata !{i8 1, i8 2, i8 -1, i8 0}
; CHECK: Intervals are overlapping, contiguous or not in order
define i8 @f13(i8* %x) {
entry:
%y = load i8* %x, align 1, !range !12
ret i8 %y
}
!12 = metadata !{i8 1, i8 3, i8 5, i8 1}
; CHECK: First and last intervals are contiguous or overlap
define i8 @f14(i8* %x) {
entry:
%y = load i8* %x, align 1, !range !13
ret i8 %y
}
!13 = metadata !{i8 1, i8 3, i8 5, i8 2}
; CHECK: First and last intervals are contiguous or overlap