and it wasn't generating calls through @PLT for these functions.
hasLocalLinkage() is now false for available_externally,
I attempted to fix the inliner and dce to handle available_externally properly.
It passed make check.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72328
91177308-0d34-0410-b5e6-
96231b3b80d8
bool hasInternalLinkage() const { return Linkage == InternalLinkage; }
bool hasPrivateLinkage() const { return Linkage == PrivateLinkage; }
bool hasLocalLinkage() const {
- return Linkage == InternalLinkage || Linkage == PrivateLinkage ||
- Linkage == AvailableExternallyLinkage;
+ return Linkage == InternalLinkage || Linkage == PrivateLinkage;
}
bool hasDLLImportLinkage() const { return Linkage == DLLImportLinkage; }
bool hasDLLExportLinkage() const { return Linkage == DLLExportLinkage; }
Changed |= RemoveUnusedGlobalValue(*I);
// Functions with external linkage are needed if they have a body
if (!I->hasLocalLinkage() && !I->hasLinkOnceLinkage() &&
- !I->isDeclaration())
+ !I->isDeclaration() && !I->hasAvailableExternallyLinkage())
GlobalIsNeeded(I);
}
// Externally visible & appending globals are needed, if they have an
// initializer.
if (!I->hasLocalLinkage() && !I->hasLinkOnceLinkage() &&
- !I->isDeclaration())
+ !I->isDeclaration() && !I->hasAvailableExternallyLinkage())
GlobalIsNeeded(I);
}
// If we inlined the last possible call site to the function, delete the
// function body now.
- if (Callee->use_empty() && Callee->hasLocalLinkage() &&
+ if (Callee->use_empty() && (Callee->hasLocalLinkage() ||
+ Callee->hasAvailableExternallyLinkage()) &&
!SCCFunctions.count(Callee)) {
DOUT << " -> Deleting dead function: " << Callee->getName() << "\n";
CallGraphNode *CalleeNode = CG[Callee];
// Inline
if (InlineFunction(CS, NULL, TD)) {
- if (Callee->use_empty() && Callee->hasLocalLinkage())
+ if (Callee->use_empty() && (Callee->hasLocalLinkage() ||
+ Callee->hasAvailableExternallyLinkage()))
DeadFunctions.insert(Callee);
Changed = true;
CallSites.erase(CallSites.begin() + index);
// If there is only one call of the function, and it has internal linkage,
// make it almost guaranteed to be inlined.
//
- if (Callee->hasLocalLinkage() && Callee->hasOneUse())
+ if ((Callee->hasLocalLinkage() || Callee->hasAvailableExternallyLinkage()) &&
+ Callee->hasOneUse())
InlineCost -= 15000;
// If this function uses the coldcc calling convention, prefer not to inline
--- /dev/null
+; RUN: llvm-as < %s | llc -relocation-model=pic | grep atoi | grep PLT
+; PR4253
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define i32 @foo(i8* %x) nounwind readonly {
+entry:
+ %call = tail call fastcc i32 @atoi(i8* %x) nounwind readonly ; <i32> [#uses=1]
+ ret i32 %call
+}
+
+define available_externally fastcc i32 @atoi(i8* %__nptr) nounwind readonly {
+entry:
+ %call = tail call i64 @strtol(i8* nocapture %__nptr, i8** null, i32 10) nounwind readonly ; <i64> [#uses=1]
+ %conv = trunc i64 %call to i32 ; <i32> [#uses=1]
+ ret i32 %conv
+}
+
+declare i64 @strtol(i8*, i8** nocapture, i32) nounwind