diff options
Diffstat (limited to 'lib/Transforms/IPO')
| -rw-r--r-- | lib/Transforms/IPO/GlobalOpt.cpp | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp index ae80c43764..75c1878f3f 100644 --- a/lib/Transforms/IPO/GlobalOpt.cpp +++ b/lib/Transforms/IPO/GlobalOpt.cpp @@ -1980,10 +1980,12 @@ isSimpleEnoughValueToCommit(Constant *C, static bool isSimpleEnoughValueToCommitHelper(Constant *C, SmallPtrSet<Constant*, 8> &SimpleConstants, const DataLayout *DL) { - // Simple integer, undef, constant aggregate zero, global addresses, etc are - // all supported. - if (C->getNumOperands() == 0 || isa<BlockAddress>(C) || - isa<GlobalValue>(C)) + // Simple global addresses are supported, do not allow dllimport globals. + if (auto *GV = dyn_cast<GlobalValue>(C)) + return !GV->hasDLLImportStorageClass(); + + // Simple integer, undef, constant aggregate zero, etc are all supported. + if (C->getNumOperands() == 0 || isa<BlockAddress>(C)) return true; // Aggregate values are safe if all their elements are. @@ -2054,8 +2056,7 @@ static bool isSimpleEnoughPointerToCommit(Constant *C) { return false; if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) - // Do not allow weak/*_odr/linkonce/dllimport/dllexport linkage or - // external globals. + // Do not allow weak/*_odr/linkonce linkage or external globals. return GV->hasUniqueInitializer(); if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { |