Improved source location reporting

compiler/teal0/backend/IRGen.jrag

@@ -310,7 +310,9 @@ aspect IRGen {
 		// formal param types
 		lang.ir.List<IRTypeRef> irTypes = new lang.ir.List<>();
 		for (VarDecl d : getFormals()) {
-			irTypes.add(d.variableType().genIRTypeRef());
+			IRTypeRef tyref = d.variableType().genIRTypeRef();
+			tyref.setSourceLocation(d.sourceLocation());
+			irTypes.add(tyref);
 		}
 		func.setParamTypeList(irTypes);
 		// return type, if any
@@ -466,6 +468,7 @@ aspect IRGen {
 		// copy this to the return value
 		ctx.addInsn(new IRCopyInsn(new IRVarRef(ctx.getReturnVar()), retVal));
 		IRCodeBB currentBB = ctx.getCurrentBB();
+
 		IRReturn ret = new IRReturn(new IRVarRef(ctx.getReturnVar()));
 		ret.setSourceLocation(sourceLocation());
 		currentBB.setIRCodeExit(ret);

compiler/teal0/backend/IRGenExpr.jrag

@@ -130,6 +130,7 @@ aspect IRGenExpr {
 		ctx.addInsn(new IRConstantInsn(size, new IRInteger((long) this.getNumExpr())));
 		IRNewArrayInsn newInsn = new IRNewArrayInsn().setDst(dst)
 			.setIRType((IRType) IRModule.makeAnyTypeRef()).setSize(size); // FIXME: more precise type if we get type inference
+		newInsn.setSourceLocation(this.sourceLocation());
 		ctx.addInsn(newInsn);
 
 		long indexCounter = 0;