diff --git a/oscar64/InterCode.cpp b/oscar64/InterCode.cpp
index 1c8e28c..55b2367 100644
--- a/oscar64/InterCode.cpp
+++ b/oscar64/InterCode.cpp
@@ -71,6 +71,18 @@ void IntegerValueRange::LimitMax(int64 value)
 	}
 }
 
+void IntegerValueRange::LimitMinBound(int64 value)
+{
+	if (mMinState == S_BOUND && mMinValue < value)
+		mMinValue = value;
+}
+
+void IntegerValueRange::LimitMaxBound(int64 value)
+{
+	if (mMaxState == S_BOUND && mMaxValue > value)
+		mMaxValue = value;
+}
+
 void IntegerValueRange::LimitMinWeak(int64 value)
 {
 	if (mMinState == S_UNBOUND || mMinValue < value)
@@ -5270,7 +5282,18 @@ void InterCodeBasicBlock::UpdateLocalIntegerRangeSets(const GrowingVariableArray
 			{
 			case IC_LOAD:
 				vr = ins->mDst.mRange;
-
+#if 1
+				if (ins->mDst.mType == IT_INT8)
+				{
+					vr.LimitMin(-128);
+					vr.LimitMax(255);
+				}
+				else if (ins->mDst.mType == IT_INT16)
+				{
+					vr.LimitMin(-32768);
+					vr.LimitMax(65535);
+				}
+#endif
 				if (i > 0 &&
 					mInstructions[i - 1]->mCode == IC_LEA && mInstructions[i - 1]->mDst.mTemp == ins->mSrc[0].mTemp &&
 					mInstructions[i - 1]->mSrc[1].mTemp < 0 && mInstructions[i - 1]->mSrc[1].mMemory == IM_GLOBAL && (mInstructions[i - 1]->mSrc[1].mLinkerObject->mFlags & LOBJF_CONST))
@@ -5736,7 +5759,18 @@ void InterCodeBasicBlock::UpdateLocalIntegerRangeSets(const GrowingVariableArray
 			default:
 				vr.mMaxState = vr.mMinState = IntegerValueRange::S_UNBOUND;
 			}
-
+#if 1
+			if (ins->mDst.mType == IT_INT8)
+			{
+				vr.LimitMinBound(-128);
+				vr.LimitMaxBound(255);
+			}
+			else if (ins->mDst.mType == IT_INT16)
+			{
+				vr.LimitMinBound(-32768);
+				vr.LimitMaxBound(65535);
+			}
+#endif
 			ins->mDst.mRange = vr;
 #if 1
 			if (vr.mMaxState == IntegerValueRange::S_BOUND && vr.mMinState == IntegerValueRange::S_BOUND && vr.mMaxValue == vr.mMinValue)
@@ -12811,6 +12845,11 @@ void InterCodeProcedure::Close(void)
 	DisassembleDebug("Estimated value range 2");
 #endif
 
+	ResetVisited();
+	mEntryBlock->SimplifyIntegerRangeRelops();
+
+	DisassembleDebug("Simplified range limited relational ops");
+
 #if 1
 	if (mModule->mCompilerOptions & COPT_OPTIMIZE_AUTO_UNROLL)
 	{
diff --git a/oscar64/InterCode.h b/oscar64/InterCode.h
index 7d663f0..3ad783e 100644
--- a/oscar64/InterCode.h
+++ b/oscar64/InterCode.h
@@ -159,6 +159,9 @@ public:
 	void LimitMin(int64 value);
 	void LimitMax(int64 value);
 
+	void LimitMinBound(int64 value);
+	void LimitMaxBound(int64 value);
+	
 	void LimitMinWeak(int64 value);
 	void LimitMaxWeak(int64 value);
 };
diff --git a/oscar64/NativeCodeGenerator.cpp b/oscar64/NativeCodeGenerator.cpp
index 390eda8..9e3329a 100644
--- a/oscar64/NativeCodeGenerator.cpp
+++ b/oscar64/NativeCodeGenerator.cpp
@@ -1159,6 +1159,12 @@ bool NativeCodeInstruction::IsShift(void) const
 	return mType == ASMIT_ASL || mType == ASMIT_LSR || mType == ASMIT_ROL || mType == ASMIT_ROR;
 }
 
+bool NativeCodeInstruction::IsShiftOrInc(void) const
+{
+	return mType == ASMIT_INC || mType == ASMIT_DEC || mType == ASMIT_ASL || mType == ASMIT_LSR;// || mType == ASMIT_ROL || mType == ASMIT_ROR;
+}
+
+
 bool NativeCodeInstruction::IsCommutative(void) const
 {
 	return mType == ASMIT_ADC || mType == ASMIT_AND || mType == ASMIT_ORA || mType == ASMIT_EOR;
@@ -14269,6 +14275,46 @@ bool NativeCodeBasicBlock::PropagateSinglePath(void)
 
 		CheckLive();
 
+#if 1
+		if (mTrueJump && mFalseJump && mTrueJump->mEntryProvidedRegs.Size() && mFalseJump->mEntryRequiredRegs.Size())
+		{
+			mTempRegs.Reset(mTrueJump->mEntryRequiredRegs.Size());
+
+			for (int i = mIns.Size() - 1; i >= 0; i--)
+			{
+				NativeCodeInstruction	ins(mIns[i]);
+
+				if (ins.mMode == ASMIM_ZERO_PAGE)
+				{
+					int	addr = ins.mAddress;
+
+					if (!mTempRegs[addr])
+					{
+						if (ins.IsShiftOrInc() && !(ins.ChangesCarry() && (ins.mLive & LIVE_CPU_REG_C)) && !(ins.mLive & LIVE_CPU_REG_Z))
+						{
+							if (mTrueJump->mEntryRequiredRegs[addr] && !mFalseJump->mEntryRequiredRegs[addr] && mTrueJump->mNumEntries == 1 && !mTrueJump->mEntryRequiredRegs[CPU_REG_Z] && !mTrueJump->mEntryRequiredRegs[CPU_REG_C] ||
+								mFalseJump->mEntryRequiredRegs[addr] && !mTrueJump->mEntryRequiredRegs[addr] && mFalseJump->mNumEntries == 1 && !mFalseJump->mEntryRequiredRegs[CPU_REG_Z] && !mFalseJump->mEntryRequiredRegs[CPU_REG_C])
+							{
+								if (mTrueJump->mEntryRequiredRegs[addr])
+									mTrueJump->mIns.Insert(0, mIns[i]);
+								else
+									mFalseJump->mIns.Insert(0, mIns[i]);
+								mIns.Remove(i);
+							}
+						}
+						else
+							mTempRegs += addr;
+					}
+				}
+				else if (ins.mMode == ASMIM_INDIRECT_Y)
+				{
+					mTempRegs += ins.mAddress;
+					mTempRegs += ins.mAddress + 1;
+				}
+			}
+		}
+#endif
+
 #if 1
 		if (mTrueJump && mFalseJump && mTrueJump->mEntryProvidedRegs.Size() && mFalseJump->mEntryRequiredRegs.Size())
 		{
diff --git a/oscar64/NativeCodeGenerator.h b/oscar64/NativeCodeGenerator.h
index 814b576..3d7dffc 100644
--- a/oscar64/NativeCodeGenerator.h
+++ b/oscar64/NativeCodeGenerator.h
@@ -138,6 +138,7 @@ public:
 	bool IsSame(const NativeCodeInstruction& ins) const;
 	bool IsCommutative(void) const;
 	bool IsShift(void) const;
+	bool IsShiftOrInc(void) const;
 	bool IsSimpleJSR(void) const;
 	bool MayBeMovedBefore(const NativeCodeInstruction& ins);
 
@@ -262,6 +263,7 @@ public:
 	NumberSet		mLocalRequiredRegs, mLocalProvidedRegs;
 	NumberSet		mEntryRequiredRegs, mEntryProvidedRegs;
 	NumberSet		mExitRequiredRegs, mExitProvidedRegs;
+	NumberSet		mTempRegs;
 
 	void BuildLocalRegSets(void);
 	void BuildGlobalProvidedRegSet(NumberSet fromProvidedTemps);