Fixed post inc and dec to not use a temporary

EthanSK · Mar 26, 2019 · 48bef36 · 48bef36
1 parent e6bdb55
commit 48bef36
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Showing 2 changed files with 10 additions and 8 deletions.
diff --git a/src/ast/operators/unaryOperators/unaryPostDecrement.cpp b/src/ast/operators/unaryOperators/unaryPostDecrement.cpp
@@ -9,11 +9,12 @@ void UnaryPostDecrement::printC(std::ostream &os) const
 
 void UnaryPostDecrement::generateIL(std::vector<Instr> &instrs, ILContext &context, std::string destReg) const
 {
-    getOperand()->generateIL(instrs, context, "$t0");
-	instrs.push_back(Instr("mov", destReg, "$t0"));
-	instrs.push_back(Instr("dec", "$t0"));
+	std::string storageLabel = context.makeName("dec_t");
+    getOperand()->generateIL(instrs, context, storageLabel);
+	instrs.push_back(Instr("mov", destReg, storageLabel));
+	instrs.push_back(Instr("dec", storageLabel));
 	LValuePtr lvalue = Utils::tryCast<LValue>(getOperand(), "Illegal ++: " + toString() + ". LHS of an increment must be an lvalue");
-	lvalue->generateLValueStoreIL(instrs, context, "$t0");
+	lvalue->generateLValueStoreIL(instrs, context, storageLabel);
 }
 
 bool UnaryPostDecrement::isConstant() const { return false; }

diff --git a/src/ast/operators/unaryOperators/unaryPostIncrement.cpp b/src/ast/operators/unaryOperators/unaryPostIncrement.cpp
@@ -9,11 +9,12 @@ void UnaryPostIncrement::printC(std::ostream &os) const
 
 void UnaryPostIncrement::generateIL(std::vector<Instr> &instrs, ILContext &context, std::string destReg) const
 {
-    getOperand()->generateIL(instrs, context, "$t0");
-	instrs.push_back(Instr("mov", destReg, "$t0"));
-	instrs.push_back(Instr("inc", "$t0"));
+	std::string storageLabel = context.makeName("inc_t");
+    getOperand()->generateIL(instrs, context, storageLabel);
+	instrs.push_back(Instr("mov", destReg, storageLabel));
+	instrs.push_back(Instr("inc", storageLabel));
 	LValuePtr lvalue = Utils::tryCast<LValue>(getOperand(), "Illegal ++: " + toString() + ". LHS of an increment must be an lvalue");
-	lvalue->generateLValueStoreIL(instrs, context, "$t0");
+	lvalue->generateLValueStoreIL(instrs, context, storageLabel);
 }
 
 bool UnaryPostIncrement::isConstant() const { return false; }