[SROA] Fix APInt size when alloca address space is not 0

SROA assumes alloca address space is 0, which causes assertion. This patch fixes that.

Differential Revision: https://reviews.llvm.org/D34104


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306440 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed