Changed simple test case

51 files changed, 623 insertions, 5 deletions

diff --git a/c_compiler/test/in/SimpleAdd_2.c b/c_compiler/test/in/SimpleAdd_2.c
index c03a527..02b052b 100644
--- a/c_compiler/test/in/SimpleAdd_2.c
+++ b/c_compiler/test/in/SimpleAdd_2.c
@@ -1,9 +1,7 @@
 int main() {
 	int x = 4;
-	int y;
+
 	x = x + 1;
-	x = x + 2;
-	
-	y = x - 1;
-	y = x + y;
+
+	return x;
 }
diff --git a/c_compiler/test/out/ComplexAssignment b/c_compiler/test/out/ComplexAssignment
new file mode 100755
index 0000000..f77cf43
--- /dev/null
+++ b/c_compiler/test/out/ComplexAssignment
diff --git a/c_compiler/test/out/ComplexAssignment.s b/c_compiler/test/out/ComplexAssignment.s
new file mode 100644
index 0000000..210316c
--- /dev/null
+++ b/c_compiler/test/out/ComplexAssignment.s
@@ -0,0 +1,42 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-32
+	sw	$fp,28($sp)
+	move	$fp,$sp
+	li	$2,5
+	sw	$2,4($fp)
+	li	$2,49
+	sw	$2,8($fp)
+	li	$2,239
+	sw	$2,12($fp)
+	li	$2,23
+	sw	$2,16($fp)
+	li	$2,234
+	sw	$2,20($fp)
+	li	$2,12
+	sw	$2,24($fp)
+	lw	$2,16($fp)
+	sw	$2,4($fp)
+	lw	$2,20($fp)
+	sw	$2,8($fp)
+	lw	$2,20($fp)
+	sw	$2,24($fp)
+	lw	$2,24($fp)
+	sw	$2,4($fp)
+	lw	$2,24($fp)
+	sw	$2,16($fp)
+	lw	$2,16($fp)
+	sw	$2,4($fp)
+	lw	$2,12($fp)
+	sw	$2,24($fp)
+	lw	$2,4($fp)
+	sw	$2,12($fp)
+	lw	$2,20($fp)
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,28($sp)
+	addiu	$sp,$sp,32
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/ComplexAssignment.stderr.txt b/c_compiler/test/out/ComplexAssignment.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/ComplexAssignment.stderr.txt
diff --git a/c_compiler/test/out/ScopeWithAdd b/c_compiler/test/out/ScopeWithAdd
new file mode 100755
index 0000000..9002d11
--- /dev/null
+++ b/c_compiler/test/out/ScopeWithAdd
diff --git a/c_compiler/test/out/ScopeWithAdd.s b/c_compiler/test/out/ScopeWithAdd.s
new file mode 100644
index 0000000..20e9a85
--- /dev/null
+++ b/c_compiler/test/out/ScopeWithAdd.s
@@ -0,0 +1,26 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-20
+	sw	$fp,16($sp)
+	move	$fp,$sp
+	li	$2,4
+	sw	$2,4($fp)
+	li	$2,35
+	sw	$2,8($fp)
+	li	$2,3
+	move	$3,$2
+	li	$2,3
+	add	$2,$2,$3
+	sw	$2,12($fp)
+	li	$2,5
+	move	$3,$2
+	li	$2,4
+	add	$2,$2,$3
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,16($sp)
+	addiu	$sp,$sp,20
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/ScopeWithAdd.stderr.txt b/c_compiler/test/out/ScopeWithAdd.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/ScopeWithAdd.stderr.txt
diff --git a/c_compiler/test/out/SimpleAdd b/c_compiler/test/out/SimpleAdd
new file mode 100755
index 0000000..bc41b4e
--- /dev/null
+++ b/c_compiler/test/out/SimpleAdd
diff --git a/c_compiler/test/out/SimpleAdd.s b/c_compiler/test/out/SimpleAdd.s
new file mode 100644
index 0000000..939e610
--- /dev/null
+++ b/c_compiler/test/out/SimpleAdd.s
@@ -0,0 +1,19 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,68
+	sw	$2,4($fp)
+	li	$2,38
+	sw	$2,8($fp)
+	lw	$2,8($fp)
+	move	$3,$2
+	lw	$2,4($fp)
+	add	$2,$2,$3
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleAdd.stderr.txt b/c_compiler/test/out/SimpleAdd.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleAdd.stderr.txt
diff --git a/c_compiler/test/out/SimpleAdd_2 b/c_compiler/test/out/SimpleAdd_2
new file mode 100755
index 0000000..976035b
--- /dev/null
+++ b/c_compiler/test/out/SimpleAdd_2
diff --git a/c_compiler/test/out/SimpleAdd_2.s b/c_compiler/test/out/SimpleAdd_2.s
new file mode 100644
index 0000000..a40358b
--- /dev/null
+++ b/c_compiler/test/out/SimpleAdd_2.s
@@ -0,0 +1,19 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-12
+	sw	$fp,8($sp)
+	move	$fp,$sp
+	li	$2,4
+	sw	$2,4($fp)
+	li	$2,1
+	move	$3,$2
+	lw	$2,4($fp)
+	add	$2,$2,$3
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,8($sp)
+	addiu	$sp,$sp,12
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleAdd_2.stderr.txt b/c_compiler/test/out/SimpleAdd_2.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleAdd_2.stderr.txt
diff --git a/c_compiler/test/out/SimpleAssignment b/c_compiler/test/out/SimpleAssignment
new file mode 100755
index 0000000..4c63ac1
--- /dev/null
+++ b/c_compiler/test/out/SimpleAssignment
diff --git a/c_compiler/test/out/SimpleAssignment.s b/c_compiler/test/out/SimpleAssignment.s
new file mode 100644
index 0000000..900d816
--- /dev/null
+++ b/c_compiler/test/out/SimpleAssignment.s
@@ -0,0 +1,16 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-12
+	sw	$fp,8($sp)
+	move	$fp,$sp
+	move	$2,$0
+	sw	$2,4($fp)
+	li	$2,15
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,8($sp)
+	addiu	$sp,$sp,12
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleAssignment.stderr.txt b/c_compiler/test/out/SimpleAssignment.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleAssignment.stderr.txt
diff --git a/c_compiler/test/out/SimpleDeclaration b/c_compiler/test/out/SimpleDeclaration
new file mode 100755
index 0000000..2860c71
--- /dev/null
+++ b/c_compiler/test/out/SimpleDeclaration
diff --git a/c_compiler/test/out/SimpleDeclaration.s b/c_compiler/test/out/SimpleDeclaration.s
new file mode 100644
index 0000000..c1ad16c
--- /dev/null
+++ b/c_compiler/test/out/SimpleDeclaration.s
@@ -0,0 +1,14 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-12
+	sw	$fp,8($sp)
+	move	$fp,$sp
+	li	$2,26
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,8($sp)
+	addiu	$sp,$sp,12
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleDeclaration.stderr.txt b/c_compiler/test/out/SimpleDeclaration.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleDeclaration.stderr.txt
diff --git a/c_compiler/test/out/SimpleReturn b/c_compiler/test/out/SimpleReturn
new file mode 100755
index 0000000..068ecc4
--- /dev/null
+++ b/c_compiler/test/out/SimpleReturn
diff --git a/c_compiler/test/out/SimpleReturn.s b/c_compiler/test/out/SimpleReturn.s
new file mode 100644
index 0000000..2fdc6fa
--- /dev/null
+++ b/c_compiler/test/out/SimpleReturn.s
@@ -0,0 +1,12 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-8
+	sw	$fp,4($sp)
+	move	$fp,$sp
+	li	$2,13
+	move	$sp,$fp
+	lw	$fp,4($sp)
+	addiu	$sp,$sp,8
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleReturn.stderr.txt b/c_compiler/test/out/SimpleReturn.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleReturn.stderr.txt
diff --git a/c_compiler/test/out/SimpleScope b/c_compiler/test/out/SimpleScope
new file mode 100755
index 0000000..00b247f
--- /dev/null
+++ b/c_compiler/test/out/SimpleScope
diff --git a/c_compiler/test/out/SimpleScope.s b/c_compiler/test/out/SimpleScope.s
new file mode 100644
index 0000000..8d2fdc4
--- /dev/null
+++ b/c_compiler/test/out/SimpleScope.s
@@ -0,0 +1,16 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-12
+	sw	$fp,8($sp)
+	move	$fp,$sp
+	li	$2,23
+	sw	$2,4($fp)
+	li	$2,123
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,8($sp)
+	addiu	$sp,$sp,12
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleScope.stderr.txt b/c_compiler/test/out/SimpleScope.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleScope.stderr.txt
diff --git a/c_compiler/test/out/SimpleShadowing b/c_compiler/test/out/SimpleShadowing
new file mode 100755
index 0000000..12e2ae1
--- /dev/null
+++ b/c_compiler/test/out/SimpleShadowing
diff --git a/c_compiler/test/out/SimpleShadowing.s b/c_compiler/test/out/SimpleShadowing.s
new file mode 100644
index 0000000..91f2bda
--- /dev/null
+++ b/c_compiler/test/out/SimpleShadowing.s
@@ -0,0 +1,16 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,12
+	sw	$2,4($fp)
+	li	$2,39
+	sw	$2,8($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleShadowing.stderr.txt b/c_compiler/test/out/SimpleShadowing.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleShadowing.stderr.txt
diff --git a/c_compiler/test/out/SimpleSubtraction b/c_compiler/test/out/SimpleSubtraction
new file mode 100755
index 0000000..4302fe4
--- /dev/null
+++ b/c_compiler/test/out/SimpleSubtraction
diff --git a/c_compiler/test/out/SimpleSubtraction.s b/c_compiler/test/out/SimpleSubtraction.s
new file mode 100644
index 0000000..5c0e0a5
--- /dev/null
+++ b/c_compiler/test/out/SimpleSubtraction.s
@@ -0,0 +1,21 @@
+	.text
+	.globl	main
+main:
+	addiu	$sp,$sp,-20
+	sw	$fp,16($sp)
+	move	$fp,$sp
+	li	$2,23
+	sw	$2,4($fp)
+	li	$2,19
+	sw	$2,8($fp)
+	lw	$2,8($fp)
+	move	$3,$2
+	lw	$2,4($fp)
+	sub	$2,$2,$3
+	sw	$2,12($fp)
+	lw	$2,12($fp)
+	move	$sp,$fp
+	lw	$fp,16($sp)
+	addiu	$sp,$sp,20
+	jr	$31
+	nop
diff --git a/c_compiler/test/out/SimpleSubtraction.stderr.txt b/c_compiler/test/out/SimpleSubtraction.stderr.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/c_compiler/test/out/SimpleSubtraction.stderr.txt
diff --git a/c_compiler/test/ref/ComplexAssignment b/c_compiler/test/ref/ComplexAssignment
new file mode 100755
index 0000000..06111ed
--- /dev/null
+++ b/c_compiler/test/ref/ComplexAssignment
diff --git a/c_compiler/test/ref/ComplexAssignment.s b/c_compiler/test/ref/ComplexAssignment.s
new file mode 100644
index 0000000..079bb29
--- /dev/null
+++ b/c_compiler/test/ref/ComplexAssignment.s
@@ -0,0 +1,65 @@
+	.file	1 "ComplexAssignment.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,32,$31		# vars= 24, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-32
+	sw	$fp,28($sp)
+	move	$fp,$sp
+	li	$2,5			# 0x5
+	sw	$2,0($fp)
+	li	$2,49			# 0x31
+	sw	$2,4($fp)
+	li	$2,239			# 0xef
+	sw	$2,8($fp)
+	li	$2,23			# 0x17
+	sw	$2,12($fp)
+	li	$2,234			# 0xea
+	sw	$2,16($fp)
+	li	$2,12			# 0xc
+	sw	$2,20($fp)
+	lw	$2,12($fp)
+	sw	$2,0($fp)
+	lw	$2,16($fp)
+	sw	$2,4($fp)
+	lw	$2,16($fp)
+	sw	$2,20($fp)
+	lw	$2,20($fp)
+	sw	$2,0($fp)
+	lw	$2,20($fp)
+	sw	$2,12($fp)
+	lw	$2,12($fp)
+	sw	$2,0($fp)
+	lw	$2,8($fp)
+	sw	$2,20($fp)
+	lw	$2,0($fp)
+	sw	$2,8($fp)
+	lw	$2,16($fp)
+	sw	$2,0($fp)
+	lw	$2,0($fp)
+	move	$sp,$fp
+	lw	$fp,28($sp)
+	addiu	$sp,$sp,32
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/ScopeWithAdd b/c_compiler/test/ref/ScopeWithAdd
new file mode 100755
index 0000000..51f517d
--- /dev/null
+++ b/c_compiler/test/ref/ScopeWithAdd
diff --git a/c_compiler/test/ref/ScopeWithAdd.s b/c_compiler/test/ref/ScopeWithAdd.s
new file mode 100644
index 0000000..74b98b0
--- /dev/null
+++ b/c_compiler/test/ref/ScopeWithAdd.s
@@ -0,0 +1,43 @@
+	.file	1 "ScopeWithAdd.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,24,$31		# vars= 16, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-24
+	sw	$fp,20($sp)
+	move	$fp,$sp
+	li	$2,4			# 0x4
+	sw	$2,4($fp)
+	li	$2,35			# 0x23
+	sw	$2,8($fp)
+	li	$2,6			# 0x6
+	sw	$2,12($fp)
+	li	$2,9			# 0x9
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,20($sp)
+	addiu	$sp,$sp,24
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleAdd b/c_compiler/test/ref/SimpleAdd
new file mode 100755
index 0000000..726818a
--- /dev/null
+++ b/c_compiler/test/ref/SimpleAdd
diff --git a/c_compiler/test/ref/SimpleAdd.s b/c_compiler/test/ref/SimpleAdd.s
new file mode 100644
index 0000000..ae0189f
--- /dev/null
+++ b/c_compiler/test/ref/SimpleAdd.s
@@ -0,0 +1,41 @@
+	.file	1 "SimpleAdd.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,16,$31		# vars= 8, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,68			# 0x44
+	sw	$2,0($fp)
+	li	$2,38			# 0x26
+	sw	$2,4($fp)
+	lw	$3,0($fp)
+	lw	$2,4($fp)
+	addu	$2,$3,$2
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleAdd_2 b/c_compiler/test/ref/SimpleAdd_2
new file mode 100755
index 0000000..d87e5ec
--- /dev/null
+++ b/c_compiler/test/ref/SimpleAdd_2
diff --git a/c_compiler/test/ref/SimpleAdd_2.s b/c_compiler/test/ref/SimpleAdd_2.s
new file mode 100644
index 0000000..516f1a2
--- /dev/null
+++ b/c_compiler/test/ref/SimpleAdd_2.s
@@ -0,0 +1,40 @@
+	.file	1 "SimpleAdd_2.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,16,$31		# vars= 8, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,4			# 0x4
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	addiu	$2,$2,1
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleAssignment b/c_compiler/test/ref/SimpleAssignment
new file mode 100755
index 0000000..8b5a267
--- /dev/null
+++ b/c_compiler/test/ref/SimpleAssignment
diff --git a/c_compiler/test/ref/SimpleAssignment.s b/c_compiler/test/ref/SimpleAssignment.s
new file mode 100644
index 0000000..87ba9db
--- /dev/null
+++ b/c_compiler/test/ref/SimpleAssignment.s
@@ -0,0 +1,37 @@
+	.file	1 "SimpleAssignment.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,16,$31		# vars= 8, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,15			# 0xf
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleDeclaration b/c_compiler/test/ref/SimpleDeclaration
new file mode 100755
index 0000000..c631eea
--- /dev/null
+++ b/c_compiler/test/ref/SimpleDeclaration
diff --git a/c_compiler/test/ref/SimpleDeclaration.s b/c_compiler/test/ref/SimpleDeclaration.s
new file mode 100644
index 0000000..943dca7
--- /dev/null
+++ b/c_compiler/test/ref/SimpleDeclaration.s
@@ -0,0 +1,37 @@
+	.file	1 "SimpleDeclaration.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,16,$31		# vars= 8, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,26			# 0x1a
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleReturn b/c_compiler/test/ref/SimpleReturn
new file mode 100755
index 0000000..f7448a9
--- /dev/null
+++ b/c_compiler/test/ref/SimpleReturn
diff --git a/c_compiler/test/ref/SimpleReturn.s b/c_compiler/test/ref/SimpleReturn.s
new file mode 100644
index 0000000..ce724b2
--- /dev/null
+++ b/c_compiler/test/ref/SimpleReturn.s
@@ -0,0 +1,35 @@
+	.file	1 "SimpleReturn.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,8,$31		# vars= 0, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-8
+	sw	$fp,4($sp)
+	move	$fp,$sp
+	li	$2,13			# 0xd
+	move	$sp,$fp
+	lw	$fp,4($sp)
+	addiu	$sp,$sp,8
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleScope b/c_compiler/test/ref/SimpleScope
new file mode 100755
index 0000000..bb7927b
--- /dev/null
+++ b/c_compiler/test/ref/SimpleScope
diff --git a/c_compiler/test/ref/SimpleScope.s b/c_compiler/test/ref/SimpleScope.s
new file mode 100644
index 0000000..ba0c6f9
--- /dev/null
+++ b/c_compiler/test/ref/SimpleScope.s
@@ -0,0 +1,39 @@
+	.file	1 "SimpleScope.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,16,$31		# vars= 8, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,23			# 0x17
+	sw	$2,4($fp)
+	li	$2,123			# 0x7b
+	sw	$2,4($fp)
+	lw	$2,4($fp)
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleShadowing b/c_compiler/test/ref/SimpleShadowing
new file mode 100755
index 0000000..c285cff
--- /dev/null
+++ b/c_compiler/test/ref/SimpleShadowing
diff --git a/c_compiler/test/ref/SimpleShadowing.s b/c_compiler/test/ref/SimpleShadowing.s
new file mode 100644
index 0000000..2b47586
--- /dev/null
+++ b/c_compiler/test/ref/SimpleShadowing.s
@@ -0,0 +1,39 @@
+	.file	1 "SimpleShadowing.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,16,$31		# vars= 8, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-16
+	sw	$fp,12($sp)
+	move	$fp,$sp
+	li	$2,12			# 0xc
+	sw	$2,0($fp)
+	li	$2,39			# 0x27
+	sw	$2,4($fp)
+	lw	$2,0($fp)
+	move	$sp,$fp
+	lw	$fp,12($sp)
+	addiu	$sp,$sp,16
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"
diff --git a/c_compiler/test/ref/SimpleSubtraction b/c_compiler/test/ref/SimpleSubtraction
new file mode 100755
index 0000000..6436dcd
--- /dev/null
+++ b/c_compiler/test/ref/SimpleSubtraction
diff --git a/c_compiler/test/ref/SimpleSubtraction.s b/c_compiler/test/ref/SimpleSubtraction.s
new file mode 100644
index 0000000..ca1493f
--- /dev/null
+++ b/c_compiler/test/ref/SimpleSubtraction.s
@@ -0,0 +1,43 @@
+	.file	1 "SimpleSubtraction.c"
+	.section .mdebug.abi32
+	.previous
+	.nan	legacy
+	.module	fp=xx
+	.module	nooddspreg
+	.abicalls
+	.text
+	.align	2
+	.globl	main
+	.set	nomips16
+	.set	nomicromips
+	.ent	main
+	.type	main, @function
+main:
+	.frame	$fp,24,$31		# vars= 16, regs= 1/0, args= 0, gp= 0
+	.mask	0x40000000,-4
+	.fmask	0x00000000,0
+	.set	noreorder
+	.set	nomacro
+	addiu	$sp,$sp,-24
+	sw	$fp,20($sp)
+	move	$fp,$sp
+	li	$2,23			# 0x17
+	sw	$2,4($fp)
+	li	$2,19			# 0x13
+	sw	$2,8($fp)
+	lw	$3,4($fp)
+	lw	$2,8($fp)
+	subu	$2,$3,$2
+	sw	$2,12($fp)
+	lw	$2,12($fp)
+	move	$sp,$fp
+	lw	$fp,20($sp)
+	addiu	$sp,$sp,24
+	j	$31
+	nop
+
+	.set	macro
+	.set	reorder
+	.end	main
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.1) 5.4.0 20160609"