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* Remove dead variable

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* Shift amount is always guaranteed to be 8 bits


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4491 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-11-02 00:44:25 +00:00
parent 5af344d79d
commit 796df73e6e
2 changed files with 12 additions and 8 deletions
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10
lib/Target/X86/InstSelectSimple.cpp
View File

@ -153,14 +153,16 @@ ISel::visitShiftInst (ShiftInst & I)
{
unsigned Op0r = getReg (I.getOperand (0));
unsigned DestReg = getReg (I);
unsigned operandSize = I.getOperand (0)->getType ()->getPrimitiveSize ();
unsigned operandSize = I.getType ()->getPrimitiveSize ();
bool isRightShift = (I.getOpcode () == Instruction::Shr);
bool isOperandUnsigned = I.getType ()->isUnsigned ();
bool isConstantShiftAmount = (isa <ConstantUInt> (I.getOperand (1)));
if (ConstantUInt *CUI = dyn_cast <ConstantUInt> (I.getOperand (1)))
{
// The shift amount is constant. Get its value.
uint64_t shAmt = CUI->getValue ();
// The shift amount is constant, guaranteed to be a ubyte. Get its value.
assert(CUI->getType() == Type::UByteTy && "Shift amount not a ubyte?");
unsigned char shAmt = CUI->getValue();
// Emit: <insn> reg, shamt (shift-by-immediate opcode "ir" form.)
if (isRightShift)
{

10
lib/Target/X86/X86ISelSimple.cpp
View File

@ -153,14 +153,16 @@ ISel::visitShiftInst (ShiftInst & I)
{
unsigned Op0r = getReg (I.getOperand (0));
unsigned DestReg = getReg (I);
unsigned operandSize = I.getOperand (0)->getType ()->getPrimitiveSize ();
unsigned operandSize = I.getType ()->getPrimitiveSize ();
bool isRightShift = (I.getOpcode () == Instruction::Shr);
bool isOperandUnsigned = I.getType ()->isUnsigned ();
bool isConstantShiftAmount = (isa <ConstantUInt> (I.getOperand (1)));
if (ConstantUInt *CUI = dyn_cast <ConstantUInt> (I.getOperand (1)))
{
// The shift amount is constant. Get its value.
uint64_t shAmt = CUI->getValue ();
// The shift amount is constant, guaranteed to be a ubyte. Get its value.
assert(CUI->getType() == Type::UByteTy && "Shift amount not a ubyte?");
unsigned char shAmt = CUI->getValue();
// Emit: <insn> reg, shamt (shift-by-immediate opcode "ir" form.)
if (isRightShift)
{