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Commit 642f799b authored by Akira Hatanaka's avatar Akira Hatanaka
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[CodeGen][ObjC] Do not call objc_storeStrong when initializing a 

constexpr variable.

When compiling a constexpr NSString initialized with an objective-c
string literal, CodeGen emits objc_storeStrong on an uninitialized
alloca, which causes a crash.

This patch folds the code in EmitScalarInit into EmitStoreThroughLValue
and fixes the crash by calling objc_retain on the string instead of
using objc_storeStrong.

rdar://problem/28562009

Differential Revision: https://reviews.llvm.org/D25547

llvm-svn: 284516
parent 1e425c9f
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