From 32283f2ed15f3958acb6f54188a436b04f0b240b Mon Sep 17 00:00:00 2001
From: Jaewoo Kim <jaewoo.kim@cp.kaist.ac.kr>
Date: Mon, 7 Apr 2025 11:03:18 +0000
Subject: [PATCH] Update model solution.

- Stop calculating operands for & operators.
- Evaluate the lhs of compound operators only once.
- Add `side-effect.c` example.
---
 examples/c/side_effect.c    | 13 ++++++++++
 examples/ir0/hello_main.ir  |  4 +--
 examples/ir0/pointer.ir     | 50 ++++++++++++-----------------------
 examples/ir0/side_effect.ir | 35 +++++++++++++++++++++++++
 examples/ir0/temp2.ir       | 17 ++++++------
 examples/ir0/typedef.ir     | 13 +++++-----
 examples/ir1/hello_main.ir  |  2 +-
 examples/ir1/pointer.ir     | 50 ++++++++++++-----------------------
 examples/ir1/side_effect.ir | 29 +++++++++++++++++++++
 examples/ir1/temp2.ir       | 21 +++++++--------
 examples/ir1/typedef.ir     | 13 +++++-----
 examples/ir2/hello_main.ir  |  2 +-
 examples/ir2/pointer.ir     | 52 ++++++++++++-------------------------
 examples/ir2/side_effect.ir | 29 +++++++++++++++++++++
 examples/ir2/temp2.ir       | 15 +++++------
 examples/ir2/typedef.ir     | 11 ++++----
 examples/ir3/hello_main.ir  |  2 +-
 examples/ir3/pointer.ir     | 29 ++++++++-------------
 examples/ir3/side_effect.ir | 29 +++++++++++++++++++++
 examples/ir4/hello_main.ir  |  2 +-
 examples/ir4/pointer.ir     | 29 ++++++++-------------
 examples/ir4/side_effect.ir | 29 +++++++++++++++++++++
 examples/opt/hello_main.ir  |  2 +-
 examples/opt/pointer.ir     | 26 ++++++++-----------
 examples/opt/side_effect.ir | 29 +++++++++++++++++++++
 tests/test_examples.rs      |  8 +++++-
 26 files changed, 331 insertions(+), 210 deletions(-)
 create mode 100644 examples/c/side_effect.c
 create mode 100644 examples/ir0/side_effect.ir
 create mode 100644 examples/ir1/side_effect.ir
 create mode 100644 examples/ir2/side_effect.ir
 create mode 100644 examples/ir3/side_effect.ir
 create mode 100644 examples/ir4/side_effect.ir
 create mode 100644 examples/opt/side_effect.ir

diff --git a/examples/c/side_effect.c b/examples/c/side_effect.c
new file mode 100644
index 0000000..23904aa
--- /dev/null
+++ b/examples/c/side_effect.c
@@ -0,0 +1,13 @@
+int g = 0;
+
+int* foo() {
+    g += 10;
+    return &g;
+}
+
+int main() {
+    // `foo()` should be called once.
+    *&*foo() += 1;
+
+    return g;
+}
diff --git a/examples/ir0/hello_main.ir b/examples/ir0/hello_main.ir
index 566a6b9..70851f9 100644
--- a/examples/ir0/hello_main.ir
+++ b/examples/ir0/hello_main.ir
@@ -2,12 +2,12 @@
 fun i32 @main () {
 init:
   bid: b0
-  allocations:
+  allocations: 
 
 
 block b0:
   ret 1:i32
 
 block b1:
-  ret 1:i32
+  ret 0:i32
 }
diff --git a/examples/ir0/pointer.ir b/examples/ir0/pointer.ir
index 4ad0cf7..73ec337 100644
--- a/examples/ir0/pointer.ir
+++ b/examples/ir0/pointer.ir
@@ -26,43 +26,25 @@ 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 = store %l1:i32** %l2:i32***
   %b0:i3:i32* = load %l1:i32**
-  %b0:i4:i32* = load %l1:i32**
-  %b0:i5:i32* = load %l1:i32**
-  %b0:i6:unit = store %l1:i32** %l2:i32***
-  %b0:i7:i32* = load %l1:i32**
-  %b0:i8:i32* = load %l1:i32**
-  %b0:i9:unit = store %b0:i8:i32* %l3:i32**
-  %b0:i10:i32** = load %l2:i32***
-  %b0:i11:i32* = load %b0:i10:i32**
+  %b0:i4:unit = store %b0:i3:i32* %l3:i32**
+  %b0:i5:i32** = load %l2:i32***
+  %b0:i6:i32* = load %b0:i5: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:i32* = load %l3:i32**
   %b0:i12:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i11:i32*)
   %b0:i13:i32 = load %b0:i12:i32*
-  %b0:i14:i32** = load %l2:i32***
-  %b0:i15:i32* = load %b0:i14:i32**
-  %b0:i16:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i15:i32*)
-  %b0:i17:i32** = load %l2:i32***
-  %b0:i18:i32* = load %b0:i17:i32**
-  %b0:i19:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i18:i32*)
-  %b0:i20:i32 = load %b0:i19:i32*
-  %b0:i21:i32** = load %l2:i32***
-  %b0:i22:i32* = load %b0:i21: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:i32* = load %l3:i32**
-  %b0:i28:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i27:i32*)
-  %b0:i29:i32* = load %l3:i32**
-  %b0:i30:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i29: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
 
 block b1:
   ret 0:i32
diff --git a/examples/ir0/side_effect.ir b/examples/ir0/side_effect.ir
new file mode 100644
index 0000000..879db51
--- /dev/null
+++ b/examples/ir0/side_effect.ir
@@ -0,0 +1,35 @@
+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*
+
+block b1:
+  ret undef: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
+
+block b1:
+  ret 0:i32
+}
diff --git a/examples/ir0/temp2.ir b/examples/ir0/temp2.ir
index 7531a7e..3e5b02e 100644
--- a/examples/ir0/temp2.ir
+++ b/examples/ir0/temp2.ir
@@ -34,15 +34,14 @@ block b0:
   %b0:i19:i32 = typecast %b0:i18:i8 to i32
   %b0:i20:i32 = add %b0:i16:i32 %b0:i19:i32
   %b0:i21:unit = store %b0:i20:i32 %l0:i32*
-  %b0:i22:struct color = load %l1:struct color*
-  %b0:i23:unit = store %l1:struct color* %l2:struct color**
-  %b0:i24:i32 = load %l0:i32*
-  %b0:i25:struct color* = load %l2:struct color**
-  %b0:i26:i8* = getelementptr %b0:i25: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:i24:i32 %b0:i28:i32
-  %b0:i30:unit = store %b0:i29:i32 %l0:i32*
+  %b0:i22:unit = store %l1:struct color* %l2:struct color**
+  %b0:i23:i32 = load %l0:i32*
+  %b0:i24:struct color* = load %l2:struct color**
+  %b0:i25:i8* = getelementptr %b0:i24: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:i23:i32 %b0:i27:i32
+  %b0:i29:unit = store %b0:i28:i32 %l0:i32*
   j b1()
 
 block b1:
diff --git a/examples/ir0/typedef.ir b/examples/ir0/typedef.ir
index ba668eb..5635d6b 100644
--- a/examples/ir0/typedef.ir
+++ b/examples/ir0/typedef.ir
@@ -8,13 +8,12 @@ init:
 
 block b0:
   %b0:i0:unit = store 0:i32 %l0:i32*
-  %b0:i1:i32 = load %l0:i32*
-  %b0:i2:unit = store %l0:i32* %l1:i32*const*
-  %b0:i3:i32* = load %l1:i32*const*
-  %b0:i4:unit = store 1:i32 %b0:i3:i32*
-  %b0:i5:i32* = load %l1:i32*const*
-  %b0:i6:i32 = load %b0:i5:i32*
-  ret %b0:i6:i32
+  %b0:i1:unit = store %l0:i32* %l1:i32*const*
+  %b0:i2:i32* = load %l1:i32*const*
+  %b0:i3:unit = store 1:i32 %b0:i2:i32*
+  %b0:i4:i32* = load %l1:i32*const*
+  %b0:i5:i32 = load %b0:i4:i32*
+  ret %b0:i5:i32
 
 block b1:
   ret 0:i32
diff --git a/examples/ir1/hello_main.ir b/examples/ir1/hello_main.ir
index 2585836..9adaea1 100644
--- a/examples/ir1/hello_main.ir
+++ b/examples/ir1/hello_main.ir
@@ -2,7 +2,7 @@
 fun i32 @main () {
 init:
   bid: b0
-  allocations:
+  allocations: 
 
 
 block b0:
diff --git a/examples/ir1/pointer.ir b/examples/ir1/pointer.ir
index d65137d..350a8e2 100644
--- a/examples/ir1/pointer.ir
+++ b/examples/ir1/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 = store %l1:i32** %l2:i32***
   %b0:i3:i32* = load %l1:i32**
-  %b0:i4:i32* = load %l1:i32**
-  %b0:i5:i32* = load %l1:i32**
-  %b0:i6:unit = store %l1:i32** %l2:i32***
-  %b0:i7:i32* = load %l1:i32**
-  %b0:i8:i32* = load %l1:i32**
-  %b0:i9:unit = store %b0:i8:i32* %l3:i32**
-  %b0:i10:i32** = load %l2:i32***
-  %b0:i11:i32* = load %b0:i10:i32**
+  %b0:i4:unit = store %b0:i3:i32* %l3:i32**
+  %b0:i5:i32** = load %l2:i32***
+  %b0:i6:i32* = load %b0:i5: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:i32* = load %l3:i32**
   %b0:i12:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i11:i32*)
   %b0:i13:i32 = load %b0:i12:i32*
-  %b0:i14:i32** = load %l2:i32***
-  %b0:i15:i32* = load %b0:i14:i32**
-  %b0:i16:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i15:i32*)
-  %b0:i17:i32** = load %l2:i32***
-  %b0:i18:i32* = load %b0:i17:i32**
-  %b0:i19:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i18:i32*)
-  %b0:i20:i32 = load %b0:i19:i32*
-  %b0:i21:i32** = load %l2:i32***
-  %b0:i22:i32* = load %b0:i21: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:i32* = load %l3:i32**
-  %b0:i28:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i27:i32*)
-  %b0:i29:i32* = load %l3:i32**
-  %b0:i30:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i29: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
 }
diff --git a/examples/ir1/side_effect.ir b/examples/ir1/side_effect.ir
new file mode 100644
index 0000000..43137cc
--- /dev/null
+++ b/examples/ir1/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
+}
diff --git a/examples/ir1/temp2.ir b/examples/ir1/temp2.ir
index e9ad236..ce3689f 100644
--- a/examples/ir1/temp2.ir
+++ b/examples/ir1/temp2.ir
@@ -34,17 +34,16 @@ block b0:
   %b0:i19:i32 = typecast %b0:i18:i8 to i32
   %b0:i20:i32 = add %b0:i16:i32 %b0:i19:i32
   %b0:i21:unit = store %b0:i20:i32 %l0:i32*
-  %b0:i22:struct color = load %l1:struct color*
-  %b0:i23:unit = store %l1:struct color* %l2:struct color**
-  %b0:i24:i32 = load %l0:i32*
-  %b0:i25:struct color* = load %l2:struct color**
-  %b0:i26:i8* = getelementptr %b0:i25: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:i24:i32 %b0:i28:i32
-  %b0:i30:unit = store %b0:i29:i32 %l0:i32*
-  %b0:i31:unit = store 0:i32 %l3:i32*
-  %b0:i32:unit = store 0:i32 %l4:i32*
+  %b0:i22:unit = store %l1:struct color* %l2:struct color**
+  %b0:i23:i32 = load %l0:i32*
+  %b0:i24:struct color* = load %l2:struct color**
+  %b0:i25:i8* = getelementptr %b0:i24: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:i23:i32 %b0:i27:i32
+  %b0:i29:unit = store %b0:i28:i32 %l0:i32*
+  %b0:i30:unit = store 0:i32 %l3:i32*
+  %b0:i31:unit = store 0:i32 %l4:i32*
   j b2()
 
 block b2:
diff --git a/examples/ir1/typedef.ir b/examples/ir1/typedef.ir
index dc24425..d9ed17c 100644
--- a/examples/ir1/typedef.ir
+++ b/examples/ir1/typedef.ir
@@ -8,11 +8,10 @@ init:
 
 block b0:
   %b0:i0:unit = store 0:i32 %l0:i32*
-  %b0:i1:i32 = load %l0:i32*
-  %b0:i2:unit = store %l0:i32* %l1:i32*const*
-  %b0:i3:i32* = load %l1:i32*const*
-  %b0:i4:unit = store 1:i32 %b0:i3:i32*
-  %b0:i5:i32* = load %l1:i32*const*
-  %b0:i6:i32 = load %b0:i5:i32*
-  ret %b0:i6:i32
+  %b0:i1:unit = store %l0:i32* %l1:i32*const*
+  %b0:i2:i32* = load %l1:i32*const*
+  %b0:i3:unit = store 1:i32 %b0:i2:i32*
+  %b0:i4:i32* = load %l1:i32*const*
+  %b0:i5:i32 = load %b0:i4:i32*
+  ret %b0:i5:i32
 }
diff --git a/examples/ir2/hello_main.ir b/examples/ir2/hello_main.ir
index 2585836..9adaea1 100644
--- a/examples/ir2/hello_main.ir
+++ b/examples/ir2/hello_main.ir
@@ -2,7 +2,7 @@
 fun i32 @main () {
 init:
   bid: b0
-  allocations:
+  allocations: 
 
 
 block b0:
diff --git a/examples/ir2/pointer.ir b/examples/ir2/pointer.ir
index b328e3c..b332f09 100644
--- a/examples/ir2/pointer.ir
+++ b/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
 }
diff --git a/examples/ir2/side_effect.ir b/examples/ir2/side_effect.ir
new file mode 100644
index 0000000..43137cc
--- /dev/null
+++ b/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
+}
diff --git a/examples/ir2/temp2.ir b/examples/ir2/temp2.ir
index 450a2cd..e33758d 100644
--- a/examples/ir2/temp2.ir
+++ b/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
diff --git a/examples/ir2/typedef.ir b/examples/ir2/typedef.ir
index 10e406f..8db8a43 100644
--- a/examples/ir2/typedef.ir
+++ b/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
 }
diff --git a/examples/ir3/hello_main.ir b/examples/ir3/hello_main.ir
index 2585836..9adaea1 100644
--- a/examples/ir3/hello_main.ir
+++ b/examples/ir3/hello_main.ir
@@ -2,7 +2,7 @@
 fun i32 @main () {
 init:
   bid: b0
-  allocations:
+  allocations: 
 
 
 block b0:
diff --git a/examples/ir3/pointer.ir b/examples/ir3/pointer.ir
index 3e9bb88..b9aed3f 100644
--- a/examples/ir3/pointer.ir
+++ b/examples/ir3/pointer.ir
@@ -23,22 +23,15 @@ block b0:
   %b0:i2:i32* = load %l1:i32**
   %b0:i3:i32* = load %l1:i32**
   %b0:i4:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i3:i32*)
-  %b0:i5:i32* = load %l1:i32**
-  %b0:i6:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i5:i32*)
-  %b0:i7:i32* = load %l1:i32**
-  %b0:i8:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i7:i32*)
-  %b0:i9:i32* = load %l1:i32**
-  %b0:i10:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i9:i32*)
-  %b0:i11:i32 = load %b0:i10:i32*
-  %b0:i12:i32 = add %b0:i11:i32 1:i32
-  %b0:i13:unit = store %b0:i12:i32 %b0:i6:i32*
-  %b0:i14:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i2:i32*)
-  %b0:i15:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i2:i32*)
-  %b0:i16:i32 = load %b0:i15:i32*
-  %b0:i17:i32 = add %b0:i16:i32 1:i32
-  %b0:i18:unit = store %b0:i17:i32 %b0:i14:i32*
-  %b0:i19:i32 = load %l0:i32*
-  %b0:i20:u1 = cmp eq %b0:i19:i32 3:i32
-  %b0:i21:i32 = typecast %b0:i20:u1 to i32
-  ret %b0:i21:i32
+  %b0:i5:i32 = load %b0:i4:i32*
+  %b0:i6:i32 = add %b0:i5:i32 1:i32
+  %b0:i7:unit = store %b0:i6:i32 %b0:i4:i32*
+  %b0:i8:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i2:i32*)
+  %b0:i9:i32 = load %b0:i8:i32*
+  %b0:i10:i32 = add %b0:i9:i32 1:i32
+  %b0:i11:unit = store %b0:i10:i32 %b0:i8:i32*
+  %b0:i12:i32 = load %l0:i32*
+  %b0:i13:u1 = cmp eq %b0:i12:i32 3:i32
+  %b0:i14:i32 = typecast %b0:i13:u1 to i32
+  ret %b0:i14:i32
 }
diff --git a/examples/ir3/side_effect.ir b/examples/ir3/side_effect.ir
new file mode 100644
index 0000000..43137cc
--- /dev/null
+++ b/examples/ir3/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
+}
diff --git a/examples/ir4/hello_main.ir b/examples/ir4/hello_main.ir
index 2585836..9adaea1 100644
--- a/examples/ir4/hello_main.ir
+++ b/examples/ir4/hello_main.ir
@@ -2,7 +2,7 @@
 fun i32 @main () {
 init:
   bid: b0
-  allocations:
+  allocations: 
 
 
 block b0:
diff --git a/examples/ir4/pointer.ir b/examples/ir4/pointer.ir
index 3e9bb88..b9aed3f 100644
--- a/examples/ir4/pointer.ir
+++ b/examples/ir4/pointer.ir
@@ -23,22 +23,15 @@ block b0:
   %b0:i2:i32* = load %l1:i32**
   %b0:i3:i32* = load %l1:i32**
   %b0:i4:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i3:i32*)
-  %b0:i5:i32* = load %l1:i32**
-  %b0:i6:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i5:i32*)
-  %b0:i7:i32* = load %l1:i32**
-  %b0:i8:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i7:i32*)
-  %b0:i9:i32* = load %l1:i32**
-  %b0:i10:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i9:i32*)
-  %b0:i11:i32 = load %b0:i10:i32*
-  %b0:i12:i32 = add %b0:i11:i32 1:i32
-  %b0:i13:unit = store %b0:i12:i32 %b0:i6:i32*
-  %b0:i14:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i2:i32*)
-  %b0:i15:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i2:i32*)
-  %b0:i16:i32 = load %b0:i15:i32*
-  %b0:i17:i32 = add %b0:i16:i32 1:i32
-  %b0:i18:unit = store %b0:i17:i32 %b0:i14:i32*
-  %b0:i19:i32 = load %l0:i32*
-  %b0:i20:u1 = cmp eq %b0:i19:i32 3:i32
-  %b0:i21:i32 = typecast %b0:i20:u1 to i32
-  ret %b0:i21:i32
+  %b0:i5:i32 = load %b0:i4:i32*
+  %b0:i6:i32 = add %b0:i5:i32 1:i32
+  %b0:i7:unit = store %b0:i6:i32 %b0:i4:i32*
+  %b0:i8:i32* = call @foo:[ret:i32* params:(i32*)]*(%b0:i2:i32*)
+  %b0:i9:i32 = load %b0:i8:i32*
+  %b0:i10:i32 = add %b0:i9:i32 1:i32
+  %b0:i11:unit = store %b0:i10:i32 %b0:i8:i32*
+  %b0:i12:i32 = load %l0:i32*
+  %b0:i13:u1 = cmp eq %b0:i12:i32 3:i32
+  %b0:i14:i32 = typecast %b0:i13:u1 to i32
+  ret %b0:i14:i32
 }
diff --git a/examples/ir4/side_effect.ir b/examples/ir4/side_effect.ir
new file mode 100644
index 0000000..43137cc
--- /dev/null
+++ b/examples/ir4/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
+}
diff --git a/examples/opt/hello_main.ir b/examples/opt/hello_main.ir
index 2585836..9adaea1 100644
--- a/examples/opt/hello_main.ir
+++ b/examples/opt/hello_main.ir
@@ -2,7 +2,7 @@
 fun i32 @main () {
 init:
   bid: b0
-  allocations:
+  allocations: 
 
 
 block b0:
diff --git a/examples/opt/pointer.ir b/examples/opt/pointer.ir
index 3860639..15816a9 100644
--- a/examples/opt/pointer.ir
+++ b/examples/opt/pointer.ir
@@ -19,19 +19,15 @@ init:
 block b0:
   %b0:i0:unit = store 1:i32 %l0:i32*
   %b0:i1:i32* = call @foo:[ret:i32* params:(i32*)]*(%l0:i32*)
-  %b0:i2:i32* = call @foo:[ret:i32* params:(i32*)]*(%l0:i32*)
-  %b0:i3:i32* = call @foo:[ret:i32* params:(i32*)]*(%l0:i32*)
-  %b0:i4:i32* = call @foo:[ret:i32* params:(i32*)]*(%l0:i32*)
-  %b0:i5:i32 = load %b0:i4:i32*
-  %b0:i6:i32 = add %b0:i5:i32 1:i32
-  %b0:i7:unit = store %b0:i6:i32 %b0:i2:i32*
-  %b0:i8:i32* = call @foo:[ret:i32* params:(i32*)]*(%l0:i32*)
-  %b0:i9:i32* = call @foo:[ret:i32* params:(i32*)]*(%l0:i32*)
-  %b0:i10:i32 = load %b0:i9:i32*
-  %b0:i11:i32 = add %b0:i10:i32 1:i32
-  %b0:i12:unit = store %b0:i11:i32 %b0:i8:i32*
-  %b0:i13:i32 = load %l0:i32*
-  %b0:i14:u1 = cmp eq %b0:i13:i32 3:i32
-  %b0:i15:i32 = typecast %b0:i14:u1 to i32
-  ret %b0:i15:i32
+  %b0:i2:i32 = load %b0:i1:i32*
+  %b0:i3:i32 = add %b0:i2:i32 1:i32
+  %b0:i4:unit = store %b0:i3:i32 %b0:i1:i32*
+  %b0:i5:i32* = call @foo:[ret:i32* params:(i32*)]*(%l0:i32*)
+  %b0:i6:i32 = load %b0:i5:i32*
+  %b0:i7:i32 = add %b0:i6:i32 1:i32
+  %b0:i8:unit = store %b0:i7:i32 %b0:i5:i32*
+  %b0:i9:i32 = load %l0:i32*
+  %b0:i10:u1 = cmp eq %b0:i9:i32 3:i32
+  %b0:i11:i32 = typecast %b0:i10:u1 to i32
+  ret %b0:i11:i32
 }
diff --git a/examples/opt/side_effect.ir b/examples/opt/side_effect.ir
new file mode 100644
index 0000000..43137cc
--- /dev/null
+++ b/examples/opt/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
+}
diff --git a/tests/test_examples.rs b/tests/test_examples.rs
index 057fc2f..92cc485 100644
--- a/tests/test_examples.rs
+++ b/tests/test_examples.rs
@@ -60,6 +60,9 @@ const IRGEN_SMALL_TEST_IGNORE_LIST: [&str; 12] = [
     "examples/c/temp2.c",
 ];
 
+// TODO: Enable this test next semester.
+const IRGEN_FULL_TEST_IGNORE_LIST: [&str; 1] = ["examples/c/side-effect.c"];
+
 const ASMGEN_TEST_DIR_LIST: [&str; 5] = [
     "examples/ir0",
     "examples/ir1",
@@ -101,7 +104,10 @@ fn test_examples_irgen_small() {
     test_irgen(Path::new(&format!("examples/c/{HELLO_MAIN}.c")));
     test_dir(Path::new("examples/c"), OsStr::new("c"), |path| {
         let path_str = &path.to_str().expect("`path` must be transformed to `&str`");
-        if !IRGEN_SMALL_TEST_IGNORE_LIST.contains(path_str) && !path_str.contains(HELLO_MAIN) {
+        if !IRGEN_SMALL_TEST_IGNORE_LIST.contains(path_str)
+            && !IRGEN_FULL_TEST_IGNORE_LIST.contains(path_str)
+            && !path_str.contains(HELLO_MAIN)
+        {
             println!("[testing irgen for {path:?}]");
             test_irgen(path);
         }