From f696f8db18324a54ea219172318ea0cee1d6c95b Mon Sep 17 00:00:00 2001
From: jespergravgaard <jesper@balmangravgaard.dk>
Date: Tue, 24 Sep 2019 08:55:06 +0200
Subject: [PATCH] Added test declaring a memory-variables. #328

---
 .../camelot64/kickc/model/symbols/Scope.java  |   4 +-
 .../Pass0GenerateStatementSequence.java       |   4 +-
 .../dk/camelot64/kickc/test/TestPrograms.java |   5 +
 src/test/kc/declared-memory-var-0.kc          |  13 +
 src/test/ref/declared-memory-var-0.asm        |  18 +
 src/test/ref/declared-memory-var-0.cfg        |  25 ++
 src/test/ref/declared-memory-var-0.log        | 408 ++++++++++++++++++
 src/test/ref/declared-memory-var-0.sym        |  17 +
 8 files changed, 491 insertions(+), 3 deletions(-)
 create mode 100644 src/test/kc/declared-memory-var-0.kc
 create mode 100644 src/test/ref/declared-memory-var-0.asm
 create mode 100644 src/test/ref/declared-memory-var-0.cfg
 create mode 100644 src/test/ref/declared-memory-var-0.log
 create mode 100644 src/test/ref/declared-memory-var-0.sym

diff --git a/src/main/java/dk/camelot64/kickc/model/symbols/Scope.java b/src/main/java/dk/camelot64/kickc/model/symbols/Scope.java
index c3d74bdaf..923735e0a 100644
--- a/src/main/java/dk/camelot64/kickc/model/symbols/Scope.java
+++ b/src/main/java/dk/camelot64/kickc/model/symbols/Scope.java
@@ -347,7 +347,9 @@ public abstract class Scope implements Symbol, Serializable {
                   if(asmName != null) {
                      res.append(" " + asmName);
                   }
-
+                  if(symVar.getStorageStrategy().equals(SymbolVariable.StorageStrategy.MEMORY)) {
+                     res.append(" memory");
+                  }
                   Registers.Register declRegister = symVar.getDeclaredRegister();
                   if(declRegister != null) {
                      res.append(" !" + declRegister);
diff --git a/src/main/java/dk/camelot64/kickc/passes/Pass0GenerateStatementSequence.java b/src/main/java/dk/camelot64/kickc/passes/Pass0GenerateStatementSequence.java
index 3648dd7b8..e86eafdf3 100644
--- a/src/main/java/dk/camelot64/kickc/passes/Pass0GenerateStatementSequence.java
+++ b/src/main/java/dk/camelot64/kickc/passes/Pass0GenerateStatementSequence.java
@@ -837,12 +837,12 @@ public class Pass0GenerateStatementSequence extends KickCParserBaseVisitor<Objec
       if(ctx.NUMBER() != null) {
          try {
             ConstantInteger memoryAddress = NumberParser.parseIntegerLiteral(ctx.NUMBER().getText());
-            return new DirectiveRegister(memoryAddress.getInteger());
+            return new DirectiveMemory(memoryAddress.getInteger());
          } catch(NumberFormatException e) {
             throw new CompileError(e.getMessage(), new StatementSource(ctx));
          }
       } else {
-         return new DirectiveRegister(null);
+         return new DirectiveMemory();
       }
    }
 
diff --git a/src/test/java/dk/camelot64/kickc/test/TestPrograms.java b/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
index 42716283d..cdc093145 100644
--- a/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
+++ b/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
@@ -35,6 +35,11 @@ public class TestPrograms {
    public TestPrograms() {
    }
 
+   @Test
+   public void testDelcaredMemoryVar0() throws IOException, URISyntaxException {
+      compileAndCompare("declared-memory-var-0"); //, log().verboseParse().verboseCreateSsa());
+   }
+
    /*
    @Test
    public void testProcedureCallingConventionStack6() throws IOException, URISyntaxException {
diff --git a/src/test/kc/declared-memory-var-0.kc b/src/test/kc/declared-memory-var-0.kc
new file mode 100644
index 000000000..ffa3c21a8
--- /dev/null
+++ b/src/test/kc/declared-memory-var-0.kc
@@ -0,0 +1,13 @@
+// Test declaring a variable as "memory", meaning it will be stored in memory and accessed through an implicit pointer (using load/store)
+
+memory char idx;
+
+const char* SCREEN = 0x0400;
+
+void main() {
+    idx = 0;
+    for( char i: 0..5 ) {
+        SCREEN[i] = idx;
+        idx +=i;
+    }
+}
\ No newline at end of file
diff --git a/src/test/ref/declared-memory-var-0.asm b/src/test/ref/declared-memory-var-0.asm
new file mode 100644
index 000000000..cab453187
--- /dev/null
+++ b/src/test/ref/declared-memory-var-0.asm
@@ -0,0 +1,18 @@
+// Test declaring a variable as "memory", meaning it will be stored in memory and accessed through an implicit pointer (using load/store)
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+  .label SCREEN = $400
+main: {
+    ldx #0
+    txa
+  b1:
+    sta SCREEN,x
+    stx.z $ff
+    clc
+    adc.z $ff
+    inx
+    cpx #6
+    bne b1
+    rts
+}
diff --git a/src/test/ref/declared-memory-var-0.cfg b/src/test/ref/declared-memory-var-0.cfg
new file mode 100644
index 000000000..cce049948
--- /dev/null
+++ b/src/test/ref/declared-memory-var-0.cfg
@@ -0,0 +1,25 @@
+@begin: scope:[]  from
+  [0] phi()
+  to:@1
+@1: scope:[]  from @begin
+  [1] phi()
+  [2] call main 
+  to:@end
+@end: scope:[]  from @1
+  [3] phi()
+
+(void()) main()
+main: scope:[main]  from @1
+  [4] phi()
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  [5] (byte) main::i#2 ← phi( main/(byte) 0 main::@1/(byte) main::i#1 )
+  [5] (byte) idx#5 ← phi( main/(byte) 0 main::@1/(byte) idx#2 )
+  [6] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte) idx#5
+  [7] (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2
+  [8] (byte) main::i#1 ← ++ (byte) main::i#2
+  [9] if((byte) main::i#1!=(byte) 6) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [10] return 
+  to:@return
diff --git a/src/test/ref/declared-memory-var-0.log b/src/test/ref/declared-memory-var-0.log
new file mode 100644
index 000000000..ce2c6b596
--- /dev/null
+++ b/src/test/ref/declared-memory-var-0.log
@@ -0,0 +1,408 @@
+Culled Empty Block (label) main::@2
+
+CONTROL FLOW GRAPH SSA
+@begin: scope:[]  from
+  (byte) idx#0 ← (byte) 0
+  (byte*) SCREEN#0 ← ((byte*)) (number) $400
+  to:@1
+
+(void()) main()
+main: scope:[main]  from @1
+  (byte) idx#1 ← (number) 0
+  (byte) main::i#0 ← (byte) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  (byte) main::i#2 ← phi( main/(byte) main::i#0 main::@1/(byte) main::i#1 )
+  (byte) idx#5 ← phi( main/(byte) idx#1 main::@1/(byte) idx#2 )
+  *((byte*) SCREEN#0 + (byte) main::i#2) ← (byte) idx#5
+  (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2
+  (byte) main::i#1 ← (byte) main::i#2 + rangenext(0,5)
+  (bool~) main::$0 ← (byte) main::i#1 != rangelast(0,5)
+  if((bool~) main::$0) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  (byte) idx#6 ← phi( main::@1/(byte) idx#2 )
+  (byte) idx#3 ← (byte) idx#6
+  return 
+  to:@return
+@1: scope:[]  from @begin
+  (byte) idx#8 ← phi( @begin/(byte) idx#0 )
+  call main 
+  to:@2
+@2: scope:[]  from @1
+  (byte) idx#7 ← phi( @1/(byte) idx#3 )
+  (byte) idx#4 ← (byte) idx#7
+  to:@end
+@end: scope:[]  from @2
+
+SYMBOL TABLE SSA
+(label) @1
+(label) @2
+(label) @begin
+(label) @end
+(byte*) SCREEN
+(byte*) SCREEN#0
+(byte) idx memory
+(byte) idx#0 memory
+(byte) idx#1 memory
+(byte) idx#2 memory
+(byte) idx#3 memory
+(byte) idx#4 memory
+(byte) idx#5 memory
+(byte) idx#6 memory
+(byte) idx#7 memory
+(byte) idx#8 memory
+(void()) main()
+(bool~) main::$0
+(label) main::@1
+(label) main::@return
+(byte) main::i
+(byte) main::i#0
+(byte) main::i#1
+(byte) main::i#2
+
+Adding number conversion cast (unumber) 0 in (byte) idx#1 ← (number) 0
+Successful SSA optimization PassNAddNumberTypeConversions
+Inlining cast (byte*) SCREEN#0 ← (byte*)(number) $400
+Inlining cast (byte) idx#1 ← (unumber)(number) 0
+Successful SSA optimization Pass2InlineCast
+Simplifying constant pointer cast (byte*) 1024
+Simplifying constant integer cast 0
+Successful SSA optimization PassNCastSimplification
+Finalized unsigned number type (byte) 0
+Successful SSA optimization PassNFinalizeNumberTypeConversions
+Alias (byte) idx#2 = (byte) idx#6 (byte) idx#3 
+Alias (byte) idx#0 = (byte) idx#8 
+Alias (byte) idx#4 = (byte) idx#7 
+Successful SSA optimization Pass2AliasElimination
+Identical Phi Values (byte) idx#4 (byte) idx#2
+Successful SSA optimization Pass2IdenticalPhiElimination
+Simple Condition (bool~) main::$0 [9] if((byte) main::i#1!=rangelast(0,5)) goto main::@1
+Successful SSA optimization Pass2ConditionalJumpSimplification
+Constant (const byte) idx#0 = 0
+Constant (const byte*) SCREEN#0 = (byte*) 1024
+Constant (const byte) idx#1 = 0
+Constant (const byte) main::i#0 = 0
+Successful SSA optimization Pass2ConstantIdentification
+Resolved ranged next value [7] main::i#1 ← ++ main::i#2 to ++
+Resolved ranged comparison value [9] if(main::i#1!=rangelast(0,5)) goto main::@1 to (number) 6
+Eliminating unused constant (const byte) idx#0
+Successful SSA optimization PassNEliminateUnusedVars
+Adding number conversion cast (unumber) 6 in if((byte) main::i#1!=(number) 6) goto main::@1
+Successful SSA optimization PassNAddNumberTypeConversions
+Simplifying constant integer cast 6
+Successful SSA optimization PassNCastSimplification
+Finalized unsigned number type (byte) 6
+Successful SSA optimization PassNFinalizeNumberTypeConversions
+Inlining constant with var siblings (const byte) main::i#0
+Inlining constant with var siblings (const byte) idx#1
+Constant inlined main::i#0 = (byte) 0
+Constant inlined idx#1 = (byte) 0
+Successful SSA optimization Pass2ConstantInlining
+Added new block during phi lifting main::@3(between main::@1 and main::@1)
+Adding NOP phi() at start of @begin
+Adding NOP phi() at start of @1
+Adding NOP phi() at start of @2
+Adding NOP phi() at start of @end
+Adding NOP phi() at start of main
+CALL GRAPH
+Calls in [] to main:2 
+
+Created 2 initial phi equivalence classes
+Coalesced [12] idx#9 ← idx#2
+Coalesced [13] main::i#3 ← main::i#1
+Coalesced down to 2 phi equivalence classes
+Culled Empty Block (label) @2
+Culled Empty Block (label) main::@3
+Adding NOP phi() at start of @begin
+Adding NOP phi() at start of @1
+Adding NOP phi() at start of @end
+Adding NOP phi() at start of main
+
+FINAL CONTROL FLOW GRAPH
+@begin: scope:[]  from
+  [0] phi()
+  to:@1
+@1: scope:[]  from @begin
+  [1] phi()
+  [2] call main 
+  to:@end
+@end: scope:[]  from @1
+  [3] phi()
+
+(void()) main()
+main: scope:[main]  from @1
+  [4] phi()
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  [5] (byte) main::i#2 ← phi( main/(byte) 0 main::@1/(byte) main::i#1 )
+  [5] (byte) idx#5 ← phi( main/(byte) 0 main::@1/(byte) idx#2 )
+  [6] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte) idx#5
+  [7] (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2
+  [8] (byte) main::i#1 ← ++ (byte) main::i#2
+  [9] if((byte) main::i#1!=(byte) 6) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [10] return 
+  to:@return
+
+
+VARIABLE REGISTER WEIGHTS
+(byte*) SCREEN
+(byte) idx memory
+(byte) idx#2 memory 7.333333333333333
+(byte) idx#5 memory 16.5
+(void()) main()
+(byte) main::i
+(byte) main::i#1 16.5
+(byte) main::i#2 14.666666666666666
+
+Initial phi equivalence classes
+[ idx#5 idx#2 ]
+[ main::i#2 main::i#1 ]
+Complete equivalence classes
+[ idx#5 idx#2 ]
+[ main::i#2 main::i#1 ]
+Allocated zp ZP_BYTE:2 [ idx#5 idx#2 ]
+Allocated zp ZP_BYTE:3 [ main::i#2 main::i#1 ]
+
+INITIAL ASM
+Target platform is c64basic / MOS6502X
+  // File Comments
+// Test declaring a variable as "memory", meaning it will be stored in memory and accessed through an implicit pointer (using load/store)
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  .label SCREEN = $400
+  .label idx = 2
+  // @begin
+bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+b1_from_bbegin:
+  jmp b1
+  // @1
+b1:
+  // [2] call main 
+  // [4] phi from @1 to main [phi:@1->main]
+main_from_b1:
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+bend_from_b1:
+  jmp bend
+  // @end
+bend:
+  // main
+main: {
+    .label i = 3
+    // [5] phi from main to main::@1 [phi:main->main::@1]
+  b1_from_main:
+    // [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1 
+    lda #0
+    sta.z i
+    // [5] phi (byte) idx#5 = (byte) 0 [phi:main->main::@1#1] -- vbuz1=vbuc1 
+    lda #0
+    sta.z idx
+    jmp b1
+    // [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
+  b1_from_b1:
+    // [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@1->main::@1#0] -- register_copy 
+    // [5] phi (byte) idx#5 = (byte) idx#2 [phi:main::@1->main::@1#1] -- register_copy 
+    jmp b1
+    // main::@1
+  b1:
+    // [6] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte) idx#5 -- pbuc1_derefidx_vbuz1=vbuz2 
+    lda.z idx
+    ldy.z i
+    sta SCREEN,y
+    // [7] (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2 -- vbuz1=vbuz1_plus_vbuz2 
+    lda.z idx
+    clc
+    adc.z i
+    sta.z idx
+    // [8] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuz1=_inc_vbuz1 
+    inc.z i
+    // [9] if((byte) main::i#1!=(byte) 6) goto main::@1 -- vbuz1_neq_vbuc1_then_la1 
+    lda #6
+    cmp.z i
+    bne b1_from_b1
+    jmp breturn
+    // main::@return
+  breturn:
+    // [10] return 
+    rts
+}
+  // File Data
+
+REGISTER UPLIFT POTENTIAL REGISTERS
+Statement [7] (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2 [ main::i#2 idx#2 ] ( main:2 [ main::i#2 idx#2 ] ) always clobbers reg byte a 
+Removing always clobbered register reg byte a as potential for zp ZP_BYTE:3 [ main::i#2 main::i#1 ]
+Statement [7] (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2 [ main::i#2 idx#2 ] ( main:2 [ main::i#2 idx#2 ] ) always clobbers reg byte a 
+Potential registers zp ZP_BYTE:2 [ idx#5 idx#2 ] : zp ZP_BYTE:2 , reg byte a , reg byte x , reg byte y , 
+Potential registers zp ZP_BYTE:3 [ main::i#2 main::i#1 ] : zp ZP_BYTE:3 , reg byte x , reg byte y , 
+
+REGISTER UPLIFT SCOPES
+Uplift Scope [main] 31.17: zp ZP_BYTE:3 [ main::i#2 main::i#1 ] 
+Uplift Scope [] 23.83: zp ZP_BYTE:2 [ idx#5 idx#2 ] 
+
+Uplifting [main] best 423 combination reg byte x [ main::i#2 main::i#1 ] 
+Uplifting [] best 343 combination reg byte a [ idx#5 idx#2 ] 
+
+ASSEMBLER BEFORE OPTIMIZATION
+  // File Comments
+// Test declaring a variable as "memory", meaning it will be stored in memory and accessed through an implicit pointer (using load/store)
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  .label SCREEN = $400
+  // @begin
+bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+b1_from_bbegin:
+  jmp b1
+  // @1
+b1:
+  // [2] call main 
+  // [4] phi from @1 to main [phi:@1->main]
+main_from_b1:
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+bend_from_b1:
+  jmp bend
+  // @end
+bend:
+  // main
+main: {
+    // [5] phi from main to main::@1 [phi:main->main::@1]
+  b1_from_main:
+    // [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuxx=vbuc1 
+    ldx #0
+    // [5] phi (byte) idx#5 = (byte) 0 [phi:main->main::@1#1] -- vbuaa=vbuc1 
+    lda #0
+    jmp b1
+    // [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
+  b1_from_b1:
+    // [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@1->main::@1#0] -- register_copy 
+    // [5] phi (byte) idx#5 = (byte) idx#2 [phi:main::@1->main::@1#1] -- register_copy 
+    jmp b1
+    // main::@1
+  b1:
+    // [6] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte) idx#5 -- pbuc1_derefidx_vbuxx=vbuaa 
+    sta SCREEN,x
+    // [7] (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2 -- vbuaa=vbuaa_plus_vbuxx 
+    stx.z $ff
+    clc
+    adc.z $ff
+    // [8] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuxx=_inc_vbuxx 
+    inx
+    // [9] if((byte) main::i#1!=(byte) 6) goto main::@1 -- vbuxx_neq_vbuc1_then_la1 
+    cpx #6
+    bne b1_from_b1
+    jmp breturn
+    // main::@return
+  breturn:
+    // [10] return 
+    rts
+}
+  // File Data
+
+ASSEMBLER OPTIMIZATIONS
+Removing instruction jmp b1
+Removing instruction jmp bend
+Removing instruction jmp b1
+Removing instruction jmp breturn
+Succesful ASM optimization Pass5NextJumpElimination
+Replacing instruction lda #0 with TXA
+Replacing label b1_from_b1 with b1
+Removing instruction b1_from_bbegin:
+Removing instruction b1:
+Removing instruction main_from_b1:
+Removing instruction bend_from_b1:
+Removing instruction b1_from_b1:
+Succesful ASM optimization Pass5RedundantLabelElimination
+Removing instruction bend:
+Removing instruction b1_from_main:
+Removing instruction breturn:
+Succesful ASM optimization Pass5UnusedLabelElimination
+Updating BasicUpstart to call main directly
+Removing instruction jsr main
+Succesful ASM optimization Pass5SkipBegin
+Removing instruction jmp b1
+Succesful ASM optimization Pass5NextJumpElimination
+Removing instruction bbegin:
+Succesful ASM optimization Pass5UnusedLabelElimination
+
+FINAL SYMBOL TABLE
+(label) @1
+(label) @begin
+(label) @end
+(byte*) SCREEN
+(const byte*) SCREEN#0 SCREEN = (byte*) 1024
+(byte) idx memory
+(byte) idx#2 memory reg byte a 7.333333333333333
+(byte) idx#5 memory reg byte a 16.5
+(void()) main()
+(label) main::@1
+(label) main::@return
+(byte) main::i
+(byte) main::i#1 reg byte x 16.5
+(byte) main::i#2 reg byte x 14.666666666666666
+
+reg byte a [ idx#5 idx#2 ]
+reg byte x [ main::i#2 main::i#1 ]
+
+
+FINAL ASSEMBLER
+Score: 241
+
+  // File Comments
+// Test declaring a variable as "memory", meaning it will be stored in memory and accessed through an implicit pointer (using load/store)
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+  // Global Constants & labels
+  .label SCREEN = $400
+  // @begin
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+  // @1
+  // [2] call main 
+  // [4] phi from @1 to main [phi:@1->main]
+  // [3] phi from @1 to @end [phi:@1->@end]
+  // @end
+  // main
+main: {
+    // [5] phi from main to main::@1 [phi:main->main::@1]
+    // [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuxx=vbuc1 
+    ldx #0
+    // [5] phi (byte) idx#5 = (byte) 0 [phi:main->main::@1#1] -- vbuaa=vbuc1 
+    txa
+    // [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
+    // [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@1->main::@1#0] -- register_copy 
+    // [5] phi (byte) idx#5 = (byte) idx#2 [phi:main::@1->main::@1#1] -- register_copy 
+    // main::@1
+  b1:
+    // SCREEN[i] = idx
+    // [6] *((const byte*) SCREEN#0 + (byte) main::i#2) ← (byte) idx#5 -- pbuc1_derefidx_vbuxx=vbuaa 
+    sta SCREEN,x
+    // idx +=i
+    // [7] (byte) idx#2 ← (byte) idx#5 + (byte) main::i#2 -- vbuaa=vbuaa_plus_vbuxx 
+    stx.z $ff
+    clc
+    adc.z $ff
+    // for( char i: 0..5 )
+    // [8] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuxx=_inc_vbuxx 
+    inx
+    // [9] if((byte) main::i#1!=(byte) 6) goto main::@1 -- vbuxx_neq_vbuc1_then_la1 
+    cpx #6
+    bne b1
+    // main::@return
+    // }
+    // [10] return 
+    rts
+}
+  // File Data
+
diff --git a/src/test/ref/declared-memory-var-0.sym b/src/test/ref/declared-memory-var-0.sym
new file mode 100644
index 000000000..47d9a716f
--- /dev/null
+++ b/src/test/ref/declared-memory-var-0.sym
@@ -0,0 +1,17 @@
+(label) @1
+(label) @begin
+(label) @end
+(byte*) SCREEN
+(const byte*) SCREEN#0 SCREEN = (byte*) 1024
+(byte) idx memory
+(byte) idx#2 memory reg byte a 7.333333333333333
+(byte) idx#5 memory reg byte a 16.5
+(void()) main()
+(label) main::@1
+(label) main::@return
+(byte) main::i
+(byte) main::i#1 reg byte x 16.5
+(byte) main::i#2 reg byte x 14.666666666666666
+
+reg byte a [ idx#5 idx#2 ]
+reg byte x [ main::i#2 main::i#1 ]