[TESTS] adding more ir tests

tests/IR/assign/assign0.yl

@@ -0,0 +1,12 @@
+# RUN: 
+cargo run -p ylc -- -in=%s -o=out.o
+gcc out.o -o a.exe
+./a.exe
+# IN:
+define u32 @main() {
+ entry:
+    %1 = u32 5
+    ret u32 %1
+}
+
+# EXIT_CODE=5

tests/IR/assign/assign1.yl

@@ -0,0 +1,13 @@
+# RUN: 
+cargo run -p ylc -- -in=%s -o=out.o
+gcc out.o -o a.exe
+./a.exe
+# IN:
+define u32 @main() {
+ entry:
+    %1 = u32 68
+    %2 = u32 %1
+    ret u32 %1
+}
+
+# EXIT_CODE=68

tests/IR/call/call1.yl

@@ -0,0 +1,31 @@
+# RUN: 
+cargo run -p ylc -- -in=%s -o=out.o
+gcc out.o -o a.exe
+./a.exe
+# IN:
+
+define u32 @func(u32 %0, u32 %1) {
+  entry:
+    %2 = add u32 %0, %1
+    %3 = sub u32 %2, 5
+    br cond %3 isnt0, is0
+
+  isnt0:
+    ret u32 4
+
+  is0:
+    ret u32 0
+}
+define u32 @main() {
+ entry:
+    %1 = u32 9
+    %2 = u32 21
+
+    %3 = call u32 func u32 %1 u32 %2
+
+    %4 = add u32 %3, 6
+
+    ret u32 %4
+}
+
+# EXIT_CODE=10

tests/IR/ret/ret0.yl

@@ -0,0 +1,11 @@
+# RUN: 
+cargo run -p ylc -- -in=%s -o=out.o
+gcc out.o -o a.exe
+./a.exe
+# IN:
+define u32 @main() {
+ entry:
+    ret u32 3
+}
+
+# EXIT_CODE=3

tests/IR/ret/ret1.yl

@@ -0,0 +1,11 @@
+# RUN: 
+cargo run -p ylc -- -in=%s -o=out.o
+gcc out.o -o a.exe
+./a.exe
+# IN:
+define u32 @main(u32 %0) {
+ entry:
+    ret u32 %0
+}
+
+# EXIT_CODE=1