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| author | Chris Lattner <sabre@nondot.org> | 2010-12-06 01:48:06 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-12-06 01:48:06 +0000 |
| commit | cc10244d7725f191bdc91cd62befff0c97257c7b (patch) | |
| tree | 79ce2ec92470d1999df7a3eae7b934c8b9242211 /lib/MC/ELFObjectWriter.cpp | |
| parent | 72c194a8be83d217360ebc6b1f3ad21c5ffa16a9 (diff) | |
Fix PR8728, a miscompilation I recently introduced. When optimizing
memcpy's like:
memcpy(A, B)
memcpy(A, C)
we cannot delete the first memcpy as dead if A and C might be aliases.
If so, we actually get:
memcpy(A, B)
memcpy(A, A)
which is not correct to transform into:
memcpy(A, A)
This patch was heavily influenced by Jakub Staszak's patch in PR8728, thanks
Jakub!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120974 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/MC/ELFObjectWriter.cpp')
0 files changed, 0 insertions, 0 deletions