* Remove dead variable
* 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
diff --git a/lib/Target/X86/InstSelectSimple.cpp b/lib/Target/X86/InstSelectSimple.cpp
index 7e4f689..65a7e67 100644
--- a/lib/Target/X86/InstSelectSimple.cpp
+++ b/lib/Target/X86/InstSelectSimple.cpp
@@ -153,14 +153,16 @@
{
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)
{