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JumpTable support! What this represents is working asm and jit support for

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x86 and ppc for 100% dense switch statements when relocations are non-PIC.
This support will be extended and enhanced in the coming days to support
PIC, and less dense forms of jump tables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27947 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman
2006-04-22 18:53:45 +00:00
parent 1900c012f5
commit 37efe67645
40 changed files with 717 additions and 77 deletions
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18
include/llvm/CodeGen/MachineInstr.h
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@@ -105,6 +105,7 @@ public:
MO_MachineBasicBlock, // MachineBasicBlock reference
MO_FrameIndex, // Abstract Stack Frame Index
MO_ConstantPoolIndex, // Address of indexed Constant in Constant Pool
MO_JumpTableIndex, // Address of indexed Jump Table for switch
MO_ExternalSymbol, // Name of external global symbol
MO_GlobalAddress // Address of a global value
};
@@ -242,6 +243,7 @@ public:
}
bool isFrameIndex() const { return opType == MO_FrameIndex; }
bool isConstantPoolIndex() const { return opType == MO_ConstantPoolIndex; }
bool isJumpTableIndex() const { return opType == MO_JumpTableIndex; }
bool isGlobalAddress() const { return opType == MO_GlobalAddress; }
bool isExternalSymbol() const { return opType == MO_ExternalSymbol; }
@@ -285,6 +287,10 @@ public:
assert(isConstantPoolIndex() && "Wrong MachineOperand accessor");
return (unsigned)contents.immedVal;
}
unsigned getJumpTableIndex() const {
assert(isJumpTableIndex() && "Wrong MachineOperand accessor");
return (unsigned)contents.immedVal;
}
GlobalValue *getGlobal() const {
assert(isGlobalAddress() && "Wrong MachineOperand accessor");
return (GlobalValue*)contents.value;
@@ -348,7 +354,8 @@ public:
}
void setOffset(int Offset) {
assert((isGlobalAddress() || isExternalSymbol() || isConstantPoolIndex()) &&
assert((isGlobalAddress() || isExternalSymbol() || isConstantPoolIndex() ||
isJumpTableIndex()) &&
"Wrong MachineOperand accessor");
extra.offset = Offset;
}
@@ -611,6 +618,15 @@ public:
operands.push_back(MachineOperand(I, MachineOperand::MO_ConstantPoolIndex));
}
/// addJumpTableIndexOperand - Add a jump table object index to the
/// instruction.
///
void addJumpTableIndexOperand(unsigned I) {
assert(!OperandsComplete() &&
"Trying to add an operand to a machine instr that is already done!");
operands.push_back(MachineOperand(I, MachineOperand::MO_JumpTableIndex));
}
void addGlobalAddressOperand(GlobalValue *GV, bool isPCRelative, int Offset) {
assert(!OperandsComplete() &&
"Trying to add an operand to a machine instr that is already done!");