Update model solution.

- Stop calculating operands for & operators.
- Evaluate the lhs of compound operators only once.
- Add `side-effect.c` example.

examples/ir2/hello_main.ir

@@ -2,7 +2,7 @@
 fun i32 @main () {
 init:
   bid: b0
-  allocations:
+  allocations: 
 
 
 block b0:

examples/ir2/pointer.ir

@@ -23,41 +23,23 @@ init:
 
 block b0:
   %b0:i0:unit = store 1:i32 %l0:i32*
-  %b0:i1:i32 = load %l0:i32*
-  %b0:i2:unit = store %l0:i32* %l1:i32**
+  %b0:i1:unit = store %l0:i32* %l1:i32**
+  %b0:i2:unit = nop
   %b0:i3:i32* = load %l1:i32**
-  %b0:i4:i32* = load %l1:i32**
-  %b0:i5:i32* = load %l1:i32**
-  %b0:i6:unit = nop
-  %b0:i7:i32* = load %l1:i32**
-  %b0:i8:i32* = load %l1:i32**
-  %b0:i9:unit = nop
-  %b0:i10:unit = nop
-  %b0:i11:i32* = load %l1:i32**
-  %b0:i12:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i11:i32*)
+  %b0:i4:unit = nop
+  %b0:i5:unit = nop
+  %b0:i6:i32* = load %l1:i32**
+  %b0:i7:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i6:i32*)
+  %b0:i8:i32 = load %b0:i7:i32*
+  %b0:i9:i32 = add %b0:i8:i32 1:i32
+  %b0:i10:unit = store %b0:i9:i32 %b0:i7:i32*
+  %b0:i11:unit = nop
+  %b0:i12:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i3:i32*)
   %b0:i13:i32 = load %b0:i12:i32*
-  %b0:i14:unit = nop
-  %b0:i15:i32* = load %l1:i32**
-  %b0:i16:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i15:i32*)
-  %b0:i17:unit = nop
-  %b0:i18:i32* = load %l1:i32**
-  %b0:i19:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i18:i32*)
-  %b0:i20:i32 = load %b0:i19:i32*
-  %b0:i21:unit = nop
-  %b0:i22:i32* = load %l1:i32**
-  %b0:i23:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i22:i32*)
-  %b0:i24:i32 = load %b0:i23:i32*
-  %b0:i25:i32 = add %b0:i24:i32 1:i32
-  %b0:i26:unit = store %b0:i25:i32 %b0:i16:i32*
-  %b0:i27:unit = nop
-  %b0:i28:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i8:i32*)
-  %b0:i29:unit = nop
-  %b0:i30:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i8:i32*)
-  %b0:i31:i32 = load %b0:i30:i32*
-  %b0:i32:i32 = add %b0:i31:i32 1:i32
-  %b0:i33:unit = store %b0:i32:i32 %b0:i28:i32*
-  %b0:i34:i32 = load %l0:i32*
-  %b0:i35:u1 = cmp eq %b0:i34:i32 3:i32
-  %b0:i36:i32 = typecast %b0:i35:u1 to i32
-  ret %b0:i36:i32
+  %b0:i14:i32 = add %b0:i13:i32 1:i32
+  %b0:i15:unit = store %b0:i14:i32 %b0:i12:i32*
+  %b0:i16:i32 = load %l0:i32*
+  %b0:i17:u1 = cmp eq %b0:i16:i32 3:i32
+  %b0:i18:i32 = typecast %b0:i17:u1 to i32
+  ret %b0:i18:i32
 }

examples/ir2/side_effect.ir

@@ -0,0 +1,29 @@
+var i32 @g = 0
+
+fun i32* @foo () {
+init:
+  bid: b0
+  allocations: 
+
+
+block b0:
+  %b0:i0:i32 = load @g:i32*
+  %b0:i1:i32 = add %b0:i0:i32 10:i32
+  %b0:i2:unit = store %b0:i1:i32 @g:i32*
+  ret @g:i32*
+}
+
+fun i32 @main () {
+init:
+  bid: b0
+  allocations: 
+
+
+block b0:
+  %b0:i0:i32* = call @foo:[ret:i32* params:()]*()
+  %b0:i1:i32 = load %b0:i0:i32*
+  %b0:i2:i32 = add %b0:i1:i32 1:i32
+  %b0:i3:unit = store %b0:i2:i32 %b0:i0:i32*
+  %b0:i4:i32 = load @g:i32*
+  ret %b0:i4:i32
+}

examples/ir2/temp2.ir

@@ -34,18 +34,17 @@ block b0:
   %b0:i19:i32 = typecast %b0:i18:i8 to i32
   %b0:i20:i32 = add %b0:i9:i32 %b0:i19:i32
   %b0:i21:unit = nop
-  %b0:i22:struct color = load %l1:struct color*
+  %b0:i22:unit = nop
   %b0:i23:unit = nop
   %b0:i24:unit = nop
-  %b0:i25:unit = nop
-  %b0:i26:i8* = getelementptr %l1:struct color* offset 4:i64
-  %b0:i27:i8 = load %b0:i26:i8*
-  %b0:i28:i32 = typecast %b0:i27:i8 to i32
-  %b0:i29:i32 = add %b0:i20:i32 %b0:i28:i32
+  %b0:i25:i8* = getelementptr %l1:struct color* offset 4:i64
+  %b0:i26:i8 = load %b0:i25:i8*
+  %b0:i27:i32 = typecast %b0:i26:i8 to i32
+  %b0:i28:i32 = add %b0:i20:i32 %b0:i27:i32
+  %b0:i29:unit = nop
   %b0:i30:unit = nop
   %b0:i31:unit = nop
-  %b0:i32:unit = nop
-  j b2(%b0:i29:i32, 0:i32, undef:u1)
+  j b2(%b0:i28:i32, 0:i32, undef:u1)
 
 block b2:
   %b2:p0:i32:temp

examples/ir2/typedef.ir

@@ -8,11 +8,10 @@ init:
 
 block b0:
   %b0:i0:unit = store 0:i32 %l0:i32*
-  %b0:i1:i32 = load %l0:i32*
+  %b0:i1:unit = nop
   %b0:i2:unit = nop
-  %b0:i3:unit = nop
-  %b0:i4:unit = store 1:i32 %l0:i32*
-  %b0:i5:unit = nop
-  %b0:i6:i32 = load %l0:i32*
-  ret %b0:i6:i32
+  %b0:i3:unit = store 1:i32 %l0:i32*
+  %b0:i4:unit = nop
+  %b0:i5:i32 = load %l0:i32*
+  ret %b0:i5:i32
 }