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Add a disgusting hack to work around a libstdc++ issue. This code should

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be removed when PR400 is resolved.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18610 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-12-08 03:28:51 +00:00
parent e36ae664b9
commit a6a2bdd0e0
1 changed files with 23 additions and 0 deletions
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23
lib/Linker/LinkModules.cpp
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@ -425,6 +425,20 @@ static bool GetLinkageResult(GlobalValue *Dest, GlobalValue *Src,
return false;
}
// Gross hack, see call sites.
static void CoutHack(GlobalVariable *GV1, GlobalVariable *GV2) {
const Type *GV1Ty = GV1->getType()->getElementType();
const Type *GV2Ty = GV2->getType()->getElementType();
if (GV1->isExternal() && isa<StructType>(GV1Ty) &&
GV2->hasInitializer() && GV2->hasExternalLinkage() &&
GV2->getInitializer()->isNullValue() && isa<ArrayType>(GV2Ty) &&
cast<ArrayType>(GV2Ty)->getElementType() == Type::SByteTy) {
GV1->setInitializer(Constant::getNullValue(GV1Ty));
GV2->setInitializer(0);
}
}
// LinkGlobals - Loop through the global variables in the src module and merge
// them into the dest module.
static bool LinkGlobals(Module *Dest, Module *Src,
@ -459,6 +473,15 @@ static bool LinkGlobals(Module *Dest, Module *Src,
assert(SGV->hasInitializer() || SGV->hasExternalLinkage() &&
"Global must either be external or have an initializer!");
// This is a gross hack to handle cin/cout until PR400 is implemented. If
// we are linking an external struct against a zero-initialized array of
// sbytes, move the initializer from the array to the struct so we keep the
// struct type.
if (DGV) {
CoutHack(DGV, SGV);
CoutHack(SGV, DGV);
}
GlobalValue::LinkageTypes NewLinkage;
bool LinkFromSrc;
if (GetLinkageResult(DGV, SGV, NewLinkage, LinkFromSrc, Err))