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Check isDiscardableIfUnused, rather than hasLocalLinkage, when bumping

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GlobalValue linkage up to ExternalLinkage in the ExtractGV pass. This
prevents linkonce and linkonce_odr symbols from being DCE'd.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176459 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames
2013-03-04 22:40:44 +00:00
parent 1ae08e0077
commit 880e8c0ad4
2 changed files with 26 additions and 3 deletions
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lib/Transforms/IPO/ExtractGV.cpp
+3 -3
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@@ -60,7 +60,7 @@ namespace {
continue;
}
bool Local = I->hasLocalLinkage();
bool Local = I->isDiscardableIfUnused();
if (Local)
I->setVisibility(GlobalValue::HiddenVisibility);
@@ -80,7 +80,7 @@ namespace {
continue;
}
bool Local = I->hasLocalLinkage();
bool Local = I->isDiscardableIfUnused();
if (Local)
I->setVisibility(GlobalValue::HiddenVisibility);
@@ -97,7 +97,7 @@ namespace {
Module::alias_iterator CurI = I;
++I;
if (CurI->hasLocalLinkage()) {
if (CurI->isDiscardableIfUnused()) {
CurI->setVisibility(GlobalValue::HiddenVisibility);
CurI->setLinkage(GlobalValue::ExternalLinkage);
}