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* PIC codegen for X86/Linux has been implemented

Browse Source 
* PIC-aware internal structures in X86 Codegen have been refactored
* Visibility (default/weak) has been added
* Docs fixes (external weak linkage, visibility, formatting)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33136 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov
2007-01-12 19:20:47 +00:00
parent ab7752c149
commit 7f70559bc4
31 changed files with 607 additions and 178 deletions
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15
lib/Target/X86/X86Subtarget.cpp
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@@ -19,11 +19,11 @@
using namespace llvm;
cl::opt<X86Subtarget::AsmWriterFlavorTy>
AsmWriterFlavor("x86-asm-syntax", cl::init(X86Subtarget::unset),
AsmWriterFlavor("x86-asm-syntax", cl::init(X86Subtarget::Unset),
cl::desc("Choose style of code to emit from X86 backend:"),
cl::values(
clEnumValN(X86Subtarget::att, "att", " Emit AT&T-style assembly"),
clEnumValN(X86Subtarget::intel, "intel", " Emit Intel-style assembly"),
clEnumValN(X86Subtarget::ATT, "att", " Emit AT&T-style assembly"),
clEnumValN(X86Subtarget::Intel, "intel", " Emit Intel-style assembly"),
clEnumValEnd));
@@ -36,7 +36,7 @@ bool X86Subtarget::GVRequiresExtraLoad(const GlobalValue* GV,
bool isDirectCall) const
{
if (TM.getRelocationModel() != Reloc::Static)
if (isTargetDarwin()) {
if (isTargetDarwin() || isPICStyleGOT()) {
return (!isDirectCall &&
(GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
(GV->isExternal() && !GV->hasNotBeenReadFromBytecode())));
@@ -212,6 +212,7 @@ static const char *GetCurrentX86CPU() {
X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
: AsmFlavor(AsmWriterFlavor)
, PICStyle(PICStyle::None)
, X86SSELevel(NoMMXSSE)
, HasX86_64(false)
, stackAlignment(8)
@@ -270,11 +271,11 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
// If the asm syntax hasn't been overridden on the command line, use whatever
// the target wants.
if (AsmFlavor == X86Subtarget::unset) {
if (AsmFlavor == X86Subtarget::Unset) {
if (TargetType == isWindows) {
AsmFlavor = X86Subtarget::intel;
AsmFlavor = X86Subtarget::Intel;
} else {
AsmFlavor = X86Subtarget::att;
AsmFlavor = X86Subtarget::ATT;
}
}