llvm-6502/unique-fwd-decl-a.ll at c61674553bd6c263f0681df4d488b34836b8e82f - llvm-6502 - Applefritter: Git

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Duncan P. N. Exon Smith 66a2b0564e IR: Simplify uniquing for MDNode

Change uniquing from a `FoldingSet` to a `DenseSet` with custom
`DenseMapInfo`.  Unfortunately, this doesn't save any memory, since
`DenseSet<T>` is a simple wrapper for `DenseMap<T, char>`, but I'll come
back to fix that later.

I used the name `GenericDenseMapInfo` to the custom `DenseMapInfo` since
I'll be splitting `MDNode` into two classes soon: `MDNodeFwdDecl` for
temporaries, and `GenericMDNode` for everything else.

I also added a non-debug-info reduced version of a type-uniquing test
that started failing on an earlier draft of this patch.

Part of PR21532.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222191 91177308-0d34-0410-b5e6-96231b3b80d8

2014-11-17 23:28:21 +00:00

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 ; RUN: llvm-link %s %S/Inputs/unique-fwd-decl-b.ll -S -o - | FileCheck %s
 ; Test that the arguments of !a and !b get uniqued.
 ; CHECK: !a = !{!0}
 ; CHECK: !b = !{!0}
 !a = !{!0}
 !0 = metadata !{metadata !1}
 !1 = metadata !{}