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Fix PR1358 and test/Assembler/2007-04-25-AssemblerFoldExternWeak.ll, by
creating forward decl globals with linkage extern_weak to defeat implicit
constant folding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36469 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-04-26 05:30:35 +00:00
parent 5fc30dfe71
commit 4989b84271
1 changed files with 16 additions and 10 deletions
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26
lib/AsmParser/llvmAsmParser.y
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@ -1608,7 +1608,8 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
// Check to ensure that Type is not packed
if (STy->isPacked())
GEN_ERROR("Unpacked Initializer to vector type '" + STy->getDescription() + "'");
GEN_ERROR("Unpacked Initializer to vector type '" +
STy->getDescription() + "'");
$$ = ConstantStruct::get(STy, *$3);
delete $1; delete $3;
@ -1627,7 +1628,8 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
// Check to ensure that Type is not packed
if (STy->isPacked())
GEN_ERROR("Unpacked Initializer to vector type '" + STy->getDescription() + "'");
GEN_ERROR("Unpacked Initializer to vector type '" +
STy->getDescription() + "'");
$$ = ConstantStruct::get(STy, std::vector<Constant*>());
delete $1;
@ -1746,11 +1748,11 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
GlobalValue *GV;
if (const FunctionType *FTy =
dyn_cast<FunctionType>(PT->getElementType())) {
GV = new Function(FTy, GlobalValue::ExternalLinkage, Name,
GV = new Function(FTy, GlobalValue::ExternalWeakLinkage, Name,
CurModule.CurrentModule);
} else {
GV = new GlobalVariable(PT->getElementType(), false,
GlobalValue::ExternalLinkage, 0,
GlobalValue::ExternalWeakLinkage, 0,
Name, CurModule.CurrentModule);
}
@ -2023,7 +2025,8 @@ Definition
} GlobalVarAttributes {
CurGV = 0;
}
| OptGlobalAssign GVInternalLinkage GVVisibilityStyle ThreadLocal GlobalType ConstVal {
| OptGlobalAssign GVInternalLinkage GVVisibilityStyle ThreadLocal GlobalType
ConstVal {
if ($6 == 0)
GEN_ERROR("Global value initializer is not a constant");
CurGV = ParseGlobalVariable($1, $2, $3, $5, $6->getType(), $6, $4);
@ -2031,7 +2034,8 @@ Definition
} GlobalVarAttributes {
CurGV = 0;
}
| OptGlobalAssign GVExternalLinkage GVVisibilityStyle ThreadLocal GlobalType Types {
| OptGlobalAssign GVExternalLinkage GVVisibilityStyle ThreadLocal GlobalType
Types {
if (!UpRefs.empty())
GEN_ERROR("Invalid upreference in type: " + (*$6)->getDescription());
CurGV = ParseGlobalVariable($1, $2, $3, $5, *$6, 0, $4);
@ -2041,7 +2045,8 @@ Definition
CurGV = 0;
CHECK_FOR_ERROR
}
| OptGlobalAssign GVVisibilityStyle ALIAS AliasLinkage ResultTypes SymbolicValueRef {
| OptGlobalAssign GVVisibilityStyle ALIAS AliasLinkage ResultTypes
SymbolicValueRef {
std::string Name($1);
if (Name.empty())
GEN_ERROR("Alias name cannot be empty")
@ -2060,7 +2065,8 @@ Definition
if (V == 0)
GEN_ERROR(std::string("Invalid aliasee for alias: ") + $1);
if (GlobalValue* Aliasee = dyn_cast<GlobalValue>(V)) {
GlobalAlias* GA = new GlobalAlias(VTy, $4, Name, Aliasee, CurModule.CurrentModule);
GlobalAlias* GA = new GlobalAlias(VTy, $4, Name, Aliasee,
CurModule.CurrentModule);
GA->setVisibility($2);
InsertValue(GA, CurModule.Values);
} else
@ -2228,7 +2234,7 @@ FunctionHeaderH : OptCallingConv ResultTypes GlobalName '(' ArgList ')'
CurModule.CurrentModule->getFunctionList().push_back(Fn);
} else if (!FunctionName.empty() && // Merge with an earlier prototype?
(Fn = CurModule.CurrentModule->getFunction(FunctionName))) {
if (Fn->getFunctionType() != FT ) {
if (Fn->getFunctionType() != FT) {
// The existing function doesn't have the same type. This is an overload
// error.
GEN_ERROR("Overload of function '" + FunctionName + "' not permitted.");
@ -2243,7 +2249,7 @@ FunctionHeaderH : OptCallingConv ResultTypes GlobalName '(' ArgList ')'
AI->setName("");
}
} else { // Not already defined?
Fn = new Function(FT, GlobalValue::ExternalLinkage, FunctionName,
Fn = new Function(FT, GlobalValue::ExternalWeakLinkage, FunctionName,
CurModule.CurrentModule);
InsertValue(Fn, CurModule.Values);