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in 32-bit pic mode for targets with a GOT, x86 emits jump table

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entries with @GOTOFF whih is EK_GPRel32BlockAddress.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94474 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-01-25 23:38:14 +00:00
parent 281e7767df
commit 5e1df8d1f7
2 changed files with 17 additions and 0 deletions
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15
lib/Target/X86/X86ISelLowering.cpp
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@ -31,6 +31,7 @@
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
@ -1090,6 +1091,20 @@ X86TargetLowering::getOptimalMemOpType(uint64_t Size, unsigned Align,
return MVT::i32;
}
/// getJumpTableEncoding - Return the entry encoding for a jump table in the
/// current function. The returned value is a member of the
/// MachineJumpTableInfo::JTEntryKind enum.
unsigned X86TargetLowering::getJumpTableEncoding() const {
// In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
// symbol.
if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
Subtarget->isPICStyleGOT())
return MachineJumpTableInfo::EK_GPRel32BlockAddress;
// Otherwise, use the normal jump table encoding heuristics.
return TargetLowering::getJumpTableEncoding();
}
/// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
/// jumptable.
SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,

2
lib/Target/X86/X86ISelLowering.h
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@ -376,6 +376,8 @@ namespace llvm {
public:
explicit X86TargetLowering(X86TargetMachine &TM);
unsigned getJumpTableEncoding() const;
/// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
/// jumptable.
SDValue getPICJumpTableRelocBase(SDValue Table,