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GlobalValue: Assert symbols with local linkage have default visibility

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The change to ExtractGV.cpp has no functionality change except to avoid
the asserts.  Existing testcases already cover this, so I didn't add a
new one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208264 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith 2014-05-07 23:00:22 +00:00
parent 76c17d324c
commit 04d60023af
2 changed files with 12 additions and 5 deletions
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12
include/llvm/IR/GlobalValue.h
View File

@ -93,7 +93,11 @@ public:
bool hasProtectedVisibility() const {
return Visibility == ProtectedVisibility;
}
void setVisibility(VisibilityTypes V) { Visibility = V; }
void setVisibility(VisibilityTypes V) {
assert((!hasLocalLinkage() || V == DefaultVisibility) &&
"local linkage requires default visibility");
Visibility = V;
}
DLLStorageClassTypes getDLLStorageClass() const {
return DLLStorageClassTypes(DllStorageClass);
@ -195,7 +199,11 @@ public:
bool hasExternalWeakLinkage() const { return isExternalWeakLinkage(Linkage); }
bool hasCommonLinkage() const { return isCommonLinkage(Linkage); }
void setLinkage(LinkageTypes LT) { Linkage = LT; }
void setLinkage(LinkageTypes LT) {
assert((!isLocalLinkage(LT) || hasDefaultVisibility()) &&
"local linkage requires default visibility");
Linkage = LT;
}
LinkageTypes getLinkage() const { return Linkage; }
bool isDiscardableIfUnused() const {

5
lib/Transforms/IPO/ExtractGV.cpp
View File

@ -27,11 +27,10 @@ using namespace llvm;
/// the split module remain valid.
static void makeVisible(GlobalValue &GV, bool Delete) {
bool Local = GV.hasLocalLinkage();
if (Local)
GV.setVisibility(GlobalValue::HiddenVisibility);
if (Local || Delete) {
GV.setLinkage(GlobalValue::ExternalLinkage);
if (Local)
GV.setVisibility(GlobalValue::HiddenVisibility);
return;
}