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Add basic block machine relocation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29349 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-07-27 18:18:13 +00:00
parent 7e6e441394
commit b4e80f8857
1 changed files with 35 additions and 5 deletions
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40
include/llvm/CodeGen/MachineRelocation.h
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@ -19,6 +19,7 @@
namespace llvm {
class GlobalValue;
class MachineBasicBlock;
/// MachineRelocation - This represents a target-specific relocation value,
/// produced by the code emitter. This relocation is resolved after the has
@ -38,6 +39,7 @@ class MachineRelocation {
enum AddressType {
isResult, // Relocation has be transformed into its result pointer.
isGV, // The Target.GV field is valid.
isBB, // Relocation of BB address.
isExtSym, // The Target.ExtSym field is valid.
isConstPool, // Relocation of constant pool address.
isJumpTable, // Relocation of jump table address.
@ -52,11 +54,12 @@ class MachineRelocation {
intptr_t ConstantVal;
union {
void *Result; // If this has been resolved to a resolved pointer
GlobalValue *GV; // If this is a pointer to an LLVM global
const char *ExtSym; // If this is a pointer to a named symbol
unsigned Index; // Constant pool / jump table index
unsigned GOTIndex; // Index in the GOT of this symbol/global
void *Result; // If this has been resolved to a resolved pointer
GlobalValue *GV; // If this is a pointer to an LLVM global
MachineBasicBlock *MBB; // If this is a pointer to a LLVM BB
const char *ExtSym; // If this is a pointer to a named symbol
unsigned Index; // Constant pool / jump table index
unsigned GOTIndex; // Index in the GOT of this symbol/global
} Target;
unsigned TargetReloType : 6; // The target relocation ID.
@ -83,6 +86,22 @@ public:
return Result;
}
/// MachineRelocation::getBB - Return a relocation entry for a BB.
///
static MachineRelocation getBB(intptr_t offset,unsigned RelocationType,
MachineBasicBlock *MBB, intptr_t cst = 0) {
assert((RelocationType & ~63) == 0 && "Relocation type too large!");
MachineRelocation Result;
Result.Offset = offset;
Result.ConstantVal = cst;
Result.TargetReloType = RelocationType;
Result.AddrType = isBB;
Result.DoesntNeedFnStub = false;
Result.GOTRelative = false;
Result.Target.MBB = MBB;
return Result;
}
/// MachineRelocation::getExtSym - Return a relocation entry for an external
/// symbol, like "free".
///
@ -160,6 +179,12 @@ public:
return AddrType == isGV;
}
/// isBasicBlock - Return true if this relocation is a basic block reference.
///
bool isBasicBlock() const {
return AddrType == isBB;
}
/// isString - Return true if this is a constant string.
///
bool isString() const {
@ -200,6 +225,11 @@ public:
return Target.GV;
}
MachineBasicBlock *getBasicBlock() const {
assert(isBasicBlock() && "This is not a basic block reference!");
return Target.MBB;
}
/// getString - If this is a string value, return the string reference.
///
const char *getString() const {