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| author | Peter Collingbourne <peter@pcc.me.uk> | 2017-03-02 23:10:17 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2017-03-02 23:10:17 +0000 |
| commit | 3baa72af7d65c3d5199b3d57bfa2b6c1268306b2 (patch) | |
| tree | 52ad5b614d7aea24876bb24f08bf12f7bff27e4b /llvm/test/Transforms/ThinLTOBitcodeWriter | |
| parent | dcb004fdf1dbebc2792fe27c4f1c638e84066d8b (diff) | |
| download | bcm5719-llvm-3baa72af7d65c3d5199b3d57bfa2b6c1268306b2.tar.gz bcm5719-llvm-3baa72af7d65c3d5199b3d57bfa2b6c1268306b2.zip | |
ThinLTOBitcodeWriter: Do not follow operand edges of type GlobalValue when looking for virtual functions.
Such edges may otherwise result in infinite recursion if a pointer to a vtable
is reachable from the vtable itself. This can happen in practice if a TU
defines the ABI types used to implement RTTI, and is itself compiled with RTTI.
Fixes PR32121.
llvm-svn: 296839
Diffstat (limited to 'llvm/test/Transforms/ThinLTOBitcodeWriter')
| -rw-r--r-- | llvm/test/Transforms/ThinLTOBitcodeWriter/circular-reference.ll | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/test/Transforms/ThinLTOBitcodeWriter/circular-reference.ll b/llvm/test/Transforms/ThinLTOBitcodeWriter/circular-reference.ll new file mode 100644 index 00000000000..eeda7932449 --- /dev/null +++ b/llvm/test/Transforms/ThinLTOBitcodeWriter/circular-reference.ll @@ -0,0 +1,9 @@ +; RUN: opt -thinlto-bc -o %t %s +; RUN: llvm-modextract -b -n 0 -o - %t | llvm-dis | FileCheck --check-prefix=M0 %s +; RUN: llvm-modextract -b -n 1 -o - %t | llvm-dis | FileCheck --check-prefix=M1 %s + +; M0: @g = external constant +; M1: @g = constant +@g = constant i8* bitcast (i8** @g to i8*), !type !0 + +!0 = !{i32 0, !"typeid"} |
