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GV with ghost linkage (module being lazily streamed in in JIT lazy compilation mode) do not require extra load from stub. This fixes ExecutionEngine/2005-12-02-TailCallBug.ll.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76121 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-07-16 22:53:10 +00:00
parent 423ccfe51d
commit a82b22c667
1 changed files with 9 additions and 5 deletions
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14
lib/Target/X86/X86Subtarget.cpp
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@ -44,6 +44,10 @@ ClassifyGlobalReference(const GlobalValue *GV, const TargetMachine &TM) const {
if (GV->hasDLLImportLinkage()) if (GV->hasDLLImportLinkage())
return X86II::MO_DLLIMPORT; return X86II::MO_DLLIMPORT;
// GV with ghost linkage (in JIT lazy compilation mode) do not require an
// extra load from stub.
bool isDecl = GV->isDeclaration() && !GV->hasNotBeenReadFromBitcode();
// X86-64 in PIC mode. // X86-64 in PIC mode.
if (isPICStyleRIPRel()) { if (isPICStyleRIPRel()) {
// Large model never uses stubs. // Large model never uses stubs.
@ -55,7 +59,7 @@ ClassifyGlobalReference(const GlobalValue *GV, const TargetMachine &TM) const {
// target is x86-64 or the symbol is definitely defined in the current // target is x86-64 or the symbol is definitely defined in the current
// translation unit. // translation unit.
if (GV->hasDefaultVisibility() && if (GV->hasDefaultVisibility() &&
(GV->isDeclaration() || GV->isWeakForLinker())) (isDecl || GV->isWeakForLinker()))
return X86II::MO_GOTPCREL; return X86II::MO_GOTPCREL;
} else { } else {
assert(isTargetELF() && "Unknown rip-relative target"); assert(isTargetELF() && "Unknown rip-relative target");
@ -81,7 +85,7 @@ ClassifyGlobalReference(const GlobalValue *GV, const TargetMachine &TM) const {
// If this is a strong reference to a definition, it is definitely not // If this is a strong reference to a definition, it is definitely not
// through a stub. // through a stub.
if (!GV->isDeclaration() && !GV->isWeakForLinker()) if (!isDecl && !GV->isWeakForLinker())
return X86II::MO_PIC_BASE_OFFSET; return X86II::MO_PIC_BASE_OFFSET;
// Unless we have a symbol with hidden visibility, we have to go through a // Unless we have a symbol with hidden visibility, we have to go through a
@ -91,7 +95,7 @@ ClassifyGlobalReference(const GlobalValue *GV, const TargetMachine &TM) const {
// If symbol visibility is hidden, we have a stub for common symbol // If symbol visibility is hidden, we have a stub for common symbol
// references and external declarations. // references and external declarations.
if (GV->isDeclaration() || GV->hasCommonLinkage()) { if (isDecl || GV->hasCommonLinkage()) {
// Hidden $non_lazy_ptr reference. // Hidden $non_lazy_ptr reference.
return X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE; return X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE;
} }
@ -105,7 +109,7 @@ ClassifyGlobalReference(const GlobalValue *GV, const TargetMachine &TM) const {
// If this is a strong reference to a definition, it is definitely not // If this is a strong reference to a definition, it is definitely not
// through a stub. // through a stub.
if (!GV->isDeclaration() && !GV->isWeakForLinker()) if (!isDecl && !GV->isWeakForLinker())
return X86II::MO_NO_FLAG; return X86II::MO_NO_FLAG;
// Unless we have a symbol with hidden visibility, we have to go through a // Unless we have a symbol with hidden visibility, we have to go through a
@ -115,7 +119,7 @@ ClassifyGlobalReference(const GlobalValue *GV, const TargetMachine &TM) const {
// If symbol visibility is hidden, we have a stub for common symbol // If symbol visibility is hidden, we have a stub for common symbol
// references and external declarations. // references and external declarations.
if (GV->isDeclaration() || GV->hasCommonLinkage()) { if (isDecl || GV->hasCommonLinkage()) {
// Hidden $non_lazy_ptr reference. // Hidden $non_lazy_ptr reference.
return X86II::MO_DARWIN_HIDDEN_NONLAZY; return X86II::MO_DARWIN_HIDDEN_NONLAZY;
} }