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| author | Chris Lattner <sabre@nondot.org> | 2012-02-24 19:01:58 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2012-02-24 19:01:58 +0000 |
| commit | 009e2650d69fe93bda1864340c5f000e56c52fb8 (patch) | |
| tree | 0da13e16342e5c497332c81991972cd21517be33 /test/Transforms/InstSimplify | |
| parent | 1a2d061ec08b86ba91d7009b6ffcf08d5bac3f42 (diff) | |
| download | external_llvm-009e2650d69fe93bda1864340c5f000e56c52fb8.zip external_llvm-009e2650d69fe93bda1864340c5f000e56c52fb8.tar.gz external_llvm-009e2650d69fe93bda1864340c5f000e56c52fb8.tar.bz2 | |
fix PR12075, a regression in a recent transform I added. In unreachable code, gep chains can be infinite. Just like "stripPointerCasts", use a set to keep track of visited instructions so we don't recurse infinitely.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151383 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstSimplify')
| -rw-r--r-- | test/Transforms/InstSimplify/compare.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll index f22ac46..6ee6dfb 100644 --- a/test/Transforms/InstSimplify/compare.ll +++ b/test/Transforms/InstSimplify/compare.ll @@ -463,3 +463,13 @@ define i1 @alloca_compare(i64 %idx) { ; CHECK: alloca_compare ; CHECK: ret i1 false } + +; PR12075 +define i1 @infinite_gep() { + ret i1 1 + +unreachableblock: + %X = getelementptr i32 *%X, i32 1 + %Y = icmp eq i32* %X, null + ret i1 %Y +} |