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| author | Chandler Carruth <chandlerc@gmail.com> | 2012-10-02 22:46:45 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2012-10-02 22:46:45 +0000 |
| commit | 5c5b3cf5b8af06b8e9347f3f45e8c67438ffd446 (patch) | |
| tree | 8d0f5ecadba9f4350cceb812320fd71d8ddb0971 /test/Transforms/SROA/basictest.ll | |
| parent | 5d37976090df34f003e5128e39593b763be0ca71 (diff) | |
| download | external_llvm-5c5b3cf5b8af06b8e9347f3f45e8c67438ffd446.zip external_llvm-5c5b3cf5b8af06b8e9347f3f45e8c67438ffd446.tar.gz external_llvm-5c5b3cf5b8af06b8e9347f3f45e8c67438ffd446.tar.bz2 | |
Teach the new SROA to handle cases where an alloca that has already been
scheduled for processing on the worklist eventually gets deleted while
we are processing another alloca, fixing the original test case in
PR13990.
To facilitate this, add a remove_if helper to the SetVector abstraction.
It's not easy to use the standard abstractions for this because of the
specifics of SetVectors types and implementation.
Finally, a nice small test case is included. Thanks to Benjamin for the
fantastic reduced test case here! All I had to do was delete some empty
basic blocks!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165065 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SROA/basictest.ll')
| -rw-r--r-- | test/Transforms/SROA/basictest.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/Transforms/SROA/basictest.ll b/test/Transforms/SROA/basictest.ll index e58cef6..54a25df 100644 --- a/test/Transforms/SROA/basictest.ll +++ b/test/Transforms/SROA/basictest.ll @@ -897,3 +897,32 @@ if.end: %tmp2 = load i8* %gep ret void } + +define void @PR13990() { +; Ensure we can handle cases where processing one alloca causes the other +; alloca to become dead and get deleted. This might crash or fail under +; Valgrind if we regress. +; CHECK: @PR13990 +; CHECK-NOT: alloca +; CHECK: unreachable +; CHECK: unreachable + +entry: + %tmp1 = alloca i8* + %tmp2 = alloca i8* + br i1 undef, label %bb1, label %bb2 + +bb1: + store i8* undef, i8** %tmp2 + br i1 undef, label %bb2, label %bb3 + +bb2: + %tmp50 = select i1 undef, i8** %tmp2, i8** %tmp1 + br i1 undef, label %bb3, label %bb4 + +bb3: + unreachable + +bb4: + unreachable +} |