diff --git a/src/CodeGen/compilation/assign.rs b/src/CodeGen/compilation/assign.rs
index 3bcce65b..45259632 100644
--- a/src/CodeGen/compilation/assign.rs
+++ b/src/CodeGen/compilation/assign.rs
@@ -30,7 +30,7 @@ impl CompilationHelper {
 
     #[allow(missing_docs)]
     pub fn compile_assign_var_var(&mut self, node: &Assign<Var, Var>, mc_sink: &mut Vec<MachineInstr>, block: &Block) {
-        let src1 = *self.vars.get(&node.inner2).expect(&format!("{} has no variable location", node.inner2));
+        let src1 = *self.vars.get(&node.inner2.name).expect(&format!("{} has no variable location", node.inner2));
 
         let boxed: Box<dyn Ir> = Box::new(node.clone());
 
diff --git a/src/CodeGen/compilation/br.rs b/src/CodeGen/compilation/br.rs
index 0783ef79..890ec6ed 100644
--- a/src/CodeGen/compilation/br.rs
+++ b/src/CodeGen/compilation/br.rs
@@ -27,7 +27,7 @@ impl CompilationHelper {
             self.free(&node.inner1);
         }
 
-        let src = *self.vars.get(&node.inner1).expect("expected valid variable");
+        let src = *self.vars.get(&node.inner1.name).expect("expected valid variable");
 
         let src = match src {
             super::VarLocation::Reg(reg) => MachineOperand::Reg(reg),
diff --git a/src/CodeGen/compilation/call.rs b/src/CodeGen/compilation/call.rs
index 6e72cfa4..f83a54c8 100644
--- a/src/CodeGen/compilation/call.rs
+++ b/src/CodeGen/compilation/call.rs
@@ -23,7 +23,7 @@ impl CompilationHelper {
                 todo!("implemt arguments which are passed over the stack");
             }
 
-            let src = self.vars.get(arg).expect("expected valid variable");
+            let src = self.vars.get(&arg.name).expect("expected valid variable");
 
             match src {
                 VarLocation::Reg(reg) => instr.add_operand(MachineOperand::Reg(*reg)),
diff --git a/src/CodeGen/compilation/cast.rs b/src/CodeGen/compilation/cast.rs
index a68d1e83..72f1dd33 100644
--- a/src/CodeGen/compilation/cast.rs
+++ b/src/CodeGen/compilation/cast.rs
@@ -6,7 +6,7 @@ use crate::CodeGen::{MachineInstr, MachineMnemonic, MachineOperand};
 impl CompilationHelper {
     #[allow(missing_docs)]
     pub fn compile_cast(&mut self, node: &Cast<Var, TypeMetadata, Var>, mc_sink: &mut Vec<MachineInstr>, block: &Block) {
-        let src1 = *self.vars.get(&node.inner1).expect("expected valid variable");
+        let src1 = *self.vars.get(&node.inner1.name).expect("expected valid variable");
 
         let boxed: Box<dyn Ir> = Box::new(node.clone());
 
diff --git a/src/CodeGen/compilation/math.rs b/src/CodeGen/compilation/math.rs
index 12609fb3..56cdb079 100644
--- a/src/CodeGen/compilation/math.rs
+++ b/src/CodeGen/compilation/math.rs
@@ -8,8 +8,8 @@ macro_rules! MathVarVar {
         impl CompilationHelper {
             #[allow(missing_docs)]
             pub(crate) fn $func(&mut self, node: &$node<Var, Var, Var>, mc_sink: &mut Vec<MachineInstr>, block: &Block) {
-                let src1 = *self.vars.get(&node.inner1).expect("expected valid variable");
-                let src2 = *self.vars.get(&node.inner2).expect("expected valid variable");
+                let src1 = *self.vars.get(&node.inner1.name).expect("expected valid variable");
+                let src2 = *self.vars.get(&node.inner2.name).expect("expected valid variable");
         
                 let boxed: Box<dyn Ir> = Box::new(node.clone());
         
@@ -62,7 +62,7 @@ macro_rules! MathVarType {
         impl CompilationHelper {
             #[allow(missing_docs)]
             pub fn $func(&mut self, node: &$node<Var, Type, Var>, mc_sink: &mut Vec<MachineInstr>, block: &Block) {
-                let src1 = *self.vars.get(&node.inner1).expect("expected valid variable");
+                let src1 = *self.vars.get(&node.inner1.name).expect("expected valid variable");
         
                 let boxed: Box<dyn Ir> = Box::new(node.clone());
         
diff --git a/src/CodeGen/compilation/mod.rs b/src/CodeGen/compilation/mod.rs
index 90e9f15f..77af00fe 100644
--- a/src/CodeGen/compilation/mod.rs
+++ b/src/CodeGen/compilation/mod.rs
@@ -19,7 +19,7 @@ pub struct CompilationHelper {
 
     pub(crate) call: MachineCallingConvention,
 
-    pub(crate) vars: HashMap<Var, VarLocation>,
+    pub(crate) vars: HashMap<String, VarLocation>,
 }
 
 impl CompilationHelper {
@@ -35,7 +35,7 @@ impl CompilationHelper {
 
     /// frees the resources of the variable
     pub(crate) fn free(&mut self, var: &Var) {
-        if let Some(location) = self.vars.get(var) {
+        if let Some(location) = self.vars.get(&var.name) {
             match location {
                 VarLocation::Reg(reg) => self.regs.push(reg.arch(), reg.clone()),
             }
@@ -52,7 +52,7 @@ impl CompilationHelper {
             todo!("Registers ran out. And memory variables are currently not implemented")
         };
 
-        self.vars.insert(var.clone(), location);
+        self.vars.insert(var.name.to_owned(), location);
 
         location
     }
@@ -75,7 +75,7 @@ impl CompilationHelper {
             };
 
             self.vars.insert(
-                func.arg(num), 
+                func.arg(num).name, 
                 location
             );
 
diff --git a/src/CodeGen/compilation/ret.rs b/src/CodeGen/compilation/ret.rs
index 98cbe34f..db46a1f6 100644
--- a/src/CodeGen/compilation/ret.rs
+++ b/src/CodeGen/compilation/ret.rs
@@ -17,7 +17,7 @@ impl CompilationHelper {
 
     #[allow(missing_docs)]
     pub fn compile_ret_var(&mut self, node: &Return<Var>, mc_sink: &mut Vec<MachineInstr>, _: &Block) {
-        let src = *self.vars.get(&node.inner1).expect("expected valid variable");
+        let src = *self.vars.get(&node.inner1.name).expect("expected valid variable");
         
         let mut instr = MachineInstr::new(MachineMnemonic::Move);
 
diff --git a/src/IR/nodes/br.rs b/src/IR/nodes/br.rs
index 22cc592b..db7a84d1 100644
--- a/src/IR/nodes/br.rs
+++ b/src/IR/nodes/br.rs
@@ -73,6 +73,14 @@ impl Ir for BrCond<Var, Block, Block> {
     fn compile(&self, registry: &mut crate::Target::TargetBackendDescr) {
        registry.compile_br_cond(self)
     }
+
+    fn uses(&self, var: &Var) -> bool {
+        if self.inner1.name.to_owned() == var.name.to_owned() {
+            true
+        } else {
+            false
+        }
+    }
 }
 
 /// This trait is used for building br nodes
diff --git a/src/IR/parser/lexer.rs b/src/IR/parser/lexer.rs
index bdcba1e8..d67f8919 100644
--- a/src/IR/parser/lexer.rs
+++ b/src/IR/parser/lexer.rs
@@ -75,6 +75,9 @@ pub enum TokenType {
 
     /// block:
     Block(String),
+
+    /// cond
+    Cond,
 }
 
 impl TokenType {
@@ -99,6 +102,7 @@ impl TokenType {
             TokenType::Func(_) => "func",
             TokenType::TripleDot => "...",
             TokenType::Block(_) => "block",
+            TokenType::Cond => "cond",
         }.to_string()
     }
 }
@@ -145,6 +149,7 @@ impl IrLexer {
         keys.insert("declare".into(), TokenType::Declare);
         keys.insert("define".into(), TokenType::Define);
         keys.insert("const".into(), TokenType::Const);
+        keys.insert("cond".into(), TokenType::Cond);
 
         
         let lines = input
diff --git a/src/IR/parser/parser.rs b/src/IR/parser/parser.rs
index fdd7429c..9804d939 100644
--- a/src/IR/parser/parser.rs
+++ b/src/IR/parser/parser.rs
@@ -558,19 +558,67 @@ impl IrParser {
     fn parse_br(&mut self) -> Result<Box<dyn Ir>, IrError> {
         self.input.pop_front(); // br
 
-        self.expect( TokenType::Ident(String::new()) )?; // block names are idents
-        
-        let block = if let TokenType::Ident(name) = &self.current_token()?.typ {
-            name.to_owned()
-        } else { unreachable!() };
+        let current = self.current_token()?;
 
-        self.input.pop_front();
+        match &current.typ {
+            TokenType::Ident(block) => {
+                let block = block.to_owned();
+
+                self.input.pop_front();
+
+                Ok(ir::Br::new(Box::from(Block { 
+                    name: block, 
+                    nodes: vec![], 
+                    varCount: 0
+                })))
+            },
+            TokenType::Cond => {
+                self.input.pop_front(); // cond
+
+                let var = self.expect(TokenType::Var(String::new()))?;
+
+                let var = if let TokenType::Var(var) = var.typ 
+                                                { var } else { unreachable!() };
+
+                self.input.pop_front();
+
+                self.expect(TokenType::Ident(String::new()))?;
+
+                let iftrue;
 
-        Ok(ir::Br::new(Box::from(Block { 
-            name: block, 
-            nodes: vec![], 
-            varCount: 0
-        })))
+                if let TokenType::Ident(ident) = &self.current_token()?.typ {
+                    iftrue = ident.to_owned();
+                } else { unreachable!() }
+
+                self.input.pop_front();
+
+                self.expect(TokenType::Comma)?;
+                self.input.pop_front();
+
+                self.expect(TokenType::Ident(String::new()))?;
+
+                let iffalse;
+
+                if let TokenType::Ident(ident) = &self.current_token()?.typ {
+                    iffalse = ident.to_owned();
+                } else { unreachable!() }
+                self.input.pop_front();
+
+                Ok(ir::BrCond::new(Var {
+                    name: var,
+                    ty: TypeMetadata::Void,
+                }, Block {
+                    name: iftrue,
+                    nodes: vec![],
+                    varCount: 0,
+                }, Block {
+                    name: iffalse,
+                    nodes: vec![],
+                    varCount: 0,
+                }))
+            },
+            _ => Err(IrError::UnexpectedToken(self.current_token()?.clone())),
+        }
     }
 
     fn parse_cast(&mut self, var: String) -> Result<Box<dyn Ir>, IrError> {
diff --git a/src/IR/parser/semnatic.rs b/src/IR/parser/semnatic.rs
index 912d6270..cc4ed503 100644
--- a/src/IR/parser/semnatic.rs
+++ b/src/IR/parser/semnatic.rs
@@ -183,6 +183,8 @@ impl<'a> IrSemnatic<'a> {
                     self.analaysiz_div_var_var(&mut vars, node, loc)?;
                 } else if let Some(node) = any.downcast_ref::<Cast<Var, TypeMetadata, Var>>() {
                     self.analaysiz_cast(&mut vars, node, loc)?;
+                } else if let Some(node) = any.downcast_ref::<BrCond<Var, Block, Block>>() {
+                    self.analaysiz_br_cond(func, &mut vars, node, loc)?;
                 }
             }
         }
@@ -388,6 +390,36 @@ impl<'a> IrSemnatic<'a> {
         Ok(())
     }
 
+    fn analaysiz_br_cond(&mut self, func: &String, vars: &mut HashMap<String, TypeMetadata>, node: &BrCond<Var, Block, Block>, loc: Loc) -> Result<(), IrError> {
+        let (_, _, blocks) = self.func_sigs.get(func).unwrap();
+
+        if !blocks.contains(&node.inner2.name) {
+            Err(IrError::Unkown { 
+                what: "block".to_owned(), 
+                name: node.inner2.name.to_owned(), 
+                loc: loc.to_owned()
+            })?
+        }
+
+        if !blocks.contains(&node.inner3.name) {
+            Err(IrError::Unkown { 
+                what: "block".to_owned(), 
+                name: node.inner3.name.to_owned(), 
+                loc: loc.to_owned()
+            })?
+        }
+
+        if !vars.contains_key(&node.inner1.name) {
+            Err(IrError::Unkown { 
+                what: "variable".to_owned(), 
+                name: node.inner1.name.to_owned(), 
+                loc: loc
+            })?
+        }
+
+        Ok(())
+    }
+
     fn analyize_const(&mut self, _: &String, _: &Vec<u8>, _: &Loc, _: Linkage) -> Result<(), IrError> {
         Ok(()) // what can go wrong on constants?
     }
diff --git a/tests/IR/br.yl b/tests/IR/br0.yl
similarity index 100%
rename from tests/IR/br.yl
rename to tests/IR/br0.yl
diff --git a/tests/IR/br1.yl b/tests/IR/br1.yl
new file mode 100644
index 00000000..dab165a0
--- /dev/null
+++ b/tests/IR/br1.yl
@@ -0,0 +1,18 @@
+# RUN: 
+cargo run -p ylc -- -in=%s -o=out.o
+gcc out.o -o a.exe
+./a.exe
+# IN:
+define u32 @main() {
+ entry:
+    %1 = u64 1
+    br cond %1 istrue, isfalse
+  
+  istrue:
+    ret u32 235
+    
+  isfalse:
+    ret u32 54
+}
+
+# EXIT_CODE=235