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make direct calls set MO_PLT or MO_DARWIN_STUB as appropriate with fast isel. 

llvm-svn: 75112
This commit is contained in:
Chris Lattner 2009-07-09 06:34:26 +00:00
parent 0661b93de9
commit c58f1fb0df
1 changed files with 36 additions and 7 deletions
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43
llvm/lib/Target/X86/X86FastISel.cpp
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@ -1300,14 +1300,43 @@ bool X86FastISel::X86SelectCall(Instruction *I) {
assert(Emitted && "Failed to emit a copy instruction!"); Emitted=Emitted;
Emitted = true;
}
// Issue the call.
unsigned CallOpc = CalleeOp
? (Subtarget->is64Bit() ? X86::CALL64r : X86::CALL32r)
: (Subtarget->is64Bit() ? X86::CALL64pcrel32 : X86::CALLpcrel32);
MachineInstrBuilder MIB = CalleeOp
? BuildMI(MBB, DL, TII.get(CallOpc)).addReg(CalleeOp)
: BuildMI(MBB, DL, TII.get(CallOpc)).addGlobalAddress(GV);
MachineInstrBuilder MIB;
if (CalleeOp) {
// Register-indirect call.
unsigned CallOpc = Subtarget->is64Bit() ? X86::CALL64r : X86::CALL32r;
MIB = BuildMI(MBB, DL, TII.get(CallOpc)).addReg(CalleeOp);
} else {
// Direct call.
assert(GV && "Not a direct call");
unsigned CallOpc =
Subtarget->is64Bit() ? X86::CALL64pcrel32 : X86::CALLpcrel32;
// See if we need any target-specific flags on the GV operand.
unsigned char OpFlags = 0;
// On ELF targets, in both X86-64 and X86-32 mode, direct calls to
// external symbols most go through the PLT in PIC mode. If the symbol
// has hidden or protected visibility, or if it is static or local, then
// we don't need to use the PLT - we can directly call it.
if (Subtarget->isTargetELF() &&
TM.getRelocationModel() == Reloc::PIC_ &&
GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
OpFlags = X86II::MO_PLT;
} else if (Subtarget->isPICStyleStub() &&
(GV->isDeclaration() || GV->isWeakForLinker()) &&
Subtarget->getDarwinVers() < 9) {
// PC-relative references to external symbols should go through $stub,
// unless we're building with the leopard linker or later, which
// automatically synthesizes these stubs.
OpFlags = X86II::MO_DARWIN_STUB;
}
MIB = BuildMI(MBB, DL, TII.get(CallOpc)).addGlobalAddress(GV, 0, OpFlags);
}
// Add an implicit use GOT pointer in EBX.
if (Subtarget->isPICStyleGOT())