Fix if statements

.gitignore

@@ -9,3 +9,4 @@ docs/html/*
 build_dir/
 bin/*
 !bin/.gitkeep
+demo/*

README.md

@@ -7,7 +7,7 @@
 ![CI Status](https://github.com/ethanuppal/cs3110_compiler/actions/workflows/ci.yaml/badge.svg)
 
 > "x86 is simple trust me bro"  
-> Last updated: 2024-05-15 18:33:04.077638
+> Last updated: 2024-05-15 22:27:21.599048
 
 ```
 $ ./main -h

lib/backend/asm_emit.ml

@@ -132,8 +132,8 @@ let emit_bb text cfg regalloc bb =
       match op with
       | Variable var ->
           Asm.Section.add text (Cmp (emit_var regalloc var, Intermediate 0));
-          Asm.Section.add text (Je (Label (Basic_block.label_for false_bb)));
-          Asm.Section.add text (Jmp (Label (Basic_block.label_for true_bb)))
+          Asm.Section.add text (Je (Label (Basic_block.label_for true_bb)));
+          Asm.Section.add text (Jmp (Label (Basic_block.label_for false_bb)))
       | Constant _ -> failwith "failure")
 
 let emit_preamble ~text =

test/e2e/if.x86istmb

@@ -0,0 +1,16 @@
+func main() {
+    let x = 0
+    let y = 2
+    let z = x
+    let w = z + y
+
+    if (w == 2) {
+        print 2
+    }
+    if (w == 1) {
+        print 1
+    }
+    if (w == 0) {
+        print 0
+    }
+}