tree 20267b5f7f46defb6c887c64b9b6e6af5ec59c85
parent 2ca698df93421327a459987b33b045756cb47d4d
author Evan Cheng <evan.cheng@apple.com> 1214811085 +0000
committer Evan Cheng <evan.cheng@apple.com> 1214811085 +0000

- Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an empty string for ConstantAggregateZero case which surprises selectiondag.
- Correctly handle memcpy from constant string which is zero-initialized.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52891 91177308-0d34-0410-b5e6-96231b3b80d8