Added a few tests for the new #pragma var_model().

src/main/java/dk/camelot64/kickc/model/VariableBuilderConfig.java

@@ -1,7 +1,6 @@
 package dk.camelot64.kickc.model;
 
 import dk.camelot64.kickc.CompileLog;
-import dk.camelot64.kickc.model.operators.Operator;
 import dk.camelot64.kickc.model.statements.StatementSource;
 
 import java.util.*;
@@ -100,8 +99,8 @@ public class VariableBuilderConfig {
       List<Type> types = getTypes(paramElements);
       Optimization optimization = getOptimization(paramElements);
       MemoryArea memoryArea = getMemoryArea(paramElements);
-      if(memoryArea==null || optimization==null || paramElements.size()>0)
-         throw new CompileError("Warning: Malformed var_model parameter "+pragmaParam, statementSource);
+      if(memoryArea == null || optimization == null || paramElements.size() > 0)
+         throw new CompileError("Warning: Malformed var_model parameter " + pragmaParam, statementSource);
       for(Scope scope : scopes) {
          for(Type type : types) {
             settings.put(new ScopeType(scope, type), new Setting(scope, type, memoryArea, optimization));
@@ -216,7 +215,7 @@ public class VariableBuilderConfig {
       if(isScopeParameter)
          return Scope.PARAMETER;
       if(isScopeMember)
-            return Scope.MEMBER;
+         return Scope.MEMBER;
       throw new InternalError("Unknown scope!");
    }
 

src/test/java/dk/camelot64/kickc/test/TestPrograms.java

@@ -37,6 +37,16 @@ public class TestPrograms {
    public TestPrograms() {
    }
 
+   @Test
+   public void testVarModelMaMem2() throws IOException, URISyntaxException {
+      compileAndCompare("varmodel-ma_mem-2");
+   }
+
+   @Test
+   public void testVarModelMaMem() throws IOException, URISyntaxException {
+      compileAndCompare("varmodel-ma_mem");
+   }
+
    @Test
    public void testVarModelUnknown() throws IOException, URISyntaxException {
       assertError("varmodel-unknown", "Warning: Malformed var_model parameter");

src/test/kc/varmodel-ma_mem-2.kc

@@ -0,0 +1,11 @@
+// Test memory model multiple-assignment/main memory for all non-pointer variables
+
+#pragma var_model(ma_mem, pointer_ma_zp)
+
+void main() {
+    // A local pointer 
+    char* screen = 0x0400;
+    // A local counter
+    for( char i: 0..5 )
+        *(screen++) = 'a';
+}

src/test/kc/varmodel-ma_mem.kc

@@ -0,0 +1,11 @@
+// Test memory model multiple-assignment/main memory for all variables (here  local variables)
+
+#pragma var_model(ma_mem)
+
+void main() {
+    // A local pointer 
+    char* screen = 0x0400;
+    // A local counter
+    for( char i: 0..5 )
+        *(screen++) = 'a';
+}

src/test/ref/varmodel-ma_mem-2.asm

@@ -0,0 +1,29 @@
+// Test memory model multiple-assignment/main memory for all non-pointer variables
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+main: {
+    .label screen = 2
+    // A local pointer 
+    lda #<$400
+    sta.z screen
+    lda #>$400
+    sta.z screen+1
+    lda #0
+    sta i
+  // A local counter
+  __b1:
+    lda #'a'
+    ldy #0
+    sta (screen),y
+    inc.z screen
+    bne !+
+    inc.z screen+1
+  !:
+    inc i
+    lda #6
+    cmp i
+    bne __b1
+    rts
+    i: .byte 0
+}

src/test/ref/varmodel-ma_mem-2.cfg

@@ -0,0 +1,24 @@
+@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] (byte*) main::screen ← (byte*) 1024
+  [5] (byte) main::i ← (byte) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  [6] *((byte*) main::screen) ← (byte) 'a'
+  [7] (byte*) main::screen ← ++ (byte*) main::screen
+  [8] (byte) main::i ← ++ (byte) main::i
+  [9] if((byte) main::i!=(byte) 6) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [10] return 
+  to:@return

src/test/ref/varmodel-ma_mem-2.log

@@ -0,0 +1,342 @@
+Culled Empty Block (label) main::@2
+
+CONTROL FLOW GRAPH SSA
+@begin: scope:[]  from
+  to:@1
+
+(void()) main()
+main: scope:[main]  from @1
+  (byte*) main::screen ← (byte*)(number) $400
+  (byte) main::i ← (byte) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  *((byte*) main::screen) ← (byte) 'a'
+  (byte*) main::screen ← ++ (byte*) main::screen
+  (byte) main::i ← (byte) main::i + rangenext(0,5)
+  (bool~) main::$0 ← (byte) main::i != rangelast(0,5)
+  if((bool~) main::$0) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  return 
+  to:@return
+@1: scope:[]  from @begin
+  call main 
+  to:@2
+@2: scope:[]  from @1
+  to:@end
+@end: scope:[]  from @2
+
+SYMBOL TABLE SSA
+(label) @1
+(label) @2
+(label) @begin
+(label) @end
+(void()) main()
+(bool~) main::$0
+(label) main::@1
+(label) main::@return
+(byte) main::i loadstore
+(byte*) main::screen loadstore
+
+Simplifying constant pointer cast (byte*) 1024
+Successful SSA optimization PassNCastSimplification
+Simple Condition (bool~) main::$0 [6] if((byte) main::i!=rangelast(0,5)) goto main::@1
+Successful SSA optimization Pass2ConditionalJumpSimplification
+Resolved ranged next value [4] main::i ← ++ main::i to ++
+Resolved ranged comparison value [6] if(main::i!=rangelast(0,5)) goto main::@1 to (number) 6
+Adding number conversion cast (unumber) 6 in if((byte) main::i!=(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
+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
+CALL GRAPH
+Calls in [] to main:2 
+
+Created 0 initial phi equivalence classes
+Coalesced down to 0 phi equivalence classes
+Culled Empty Block (label) @2
+Adding NOP phi() at start of @begin
+Adding NOP phi() at start of @1
+Adding NOP phi() at start of @end
+
+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] (byte*) main::screen ← (byte*) 1024
+  [5] (byte) main::i ← (byte) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  [6] *((byte*) main::screen) ← (byte) 'a'
+  [7] (byte*) main::screen ← ++ (byte*) main::screen
+  [8] (byte) main::i ← ++ (byte) main::i
+  [9] if((byte) main::i!=(byte) 6) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [10] return 
+  to:@return
+
+
+VARIABLE REGISTER WEIGHTS
+(void()) main()
+(byte) main::i loadstore 35.0
+(byte*) main::screen loadstore 7.000000000000001
+
+Initial phi equivalence classes
+Added variable main::screen to live range equivalence class [ main::screen ]
+Added variable main::i to live range equivalence class [ main::i ]
+Complete equivalence classes
+[ main::screen ]
+[ main::i ]
+Allocated zp[2]:2 [ main::screen ]
+Allocated mem[1] [ main::i ]
+
+INITIAL ASM
+Target platform is c64basic / MOS6502X
+  // File Comments
+// Test memory model multiple-assignment/main memory for all non-pointer variables
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(__bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  // @begin
+__bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+__b1_from___bbegin:
+  jmp __b1
+  // @1
+__b1:
+  // [2] call main 
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+__bend_from___b1:
+  jmp __bend
+  // @end
+__bend:
+  // main
+main: {
+    .label screen = 2
+    // [4] (byte*) main::screen ← (byte*) 1024 -- pbuz1=pbuc1 
+    // A local pointer 
+    lda #<$400
+    sta.z screen
+    lda #>$400
+    sta.z screen+1
+    // [5] (byte) main::i ← (byte) 0 -- vbum1=vbuc1 
+    lda #0
+    sta i
+    jmp __b1
+  // A local counter
+    // main::@1
+  __b1:
+    // [6] *((byte*) main::screen) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
+    lda #'a'
+    ldy #0
+    sta (screen),y
+    // [7] (byte*) main::screen ← ++ (byte*) main::screen -- pbuz1=_inc_pbuz1 
+    inc.z screen
+    bne !+
+    inc.z screen+1
+  !:
+    // [8] (byte) main::i ← ++ (byte) main::i -- vbum1=_inc_vbum1 
+    inc i
+    // [9] if((byte) main::i!=(byte) 6) goto main::@1 -- vbum1_neq_vbuc1_then_la1 
+    lda #6
+    cmp i
+    bne __b1
+    jmp __breturn
+    // main::@return
+  __breturn:
+    // [10] return 
+    rts
+    i: .byte 0
+}
+  // File Data
+
+REGISTER UPLIFT POTENTIAL REGISTERS
+Statement [4] (byte*) main::screen ← (byte*) 1024 [ main::screen ] ( main:2 [ main::screen ] ) always clobbers reg byte a 
+Statement [5] (byte) main::i ← (byte) 0 [ main::screen ] ( main:2 [ main::screen ] ) always clobbers reg byte a 
+Statement [6] *((byte*) main::screen) ← (byte) 'a' [ ] ( main:2 [ ] ) always clobbers reg byte a reg byte y 
+Statement [9] if((byte) main::i!=(byte) 6) goto main::@1 [ main::screen ] ( main:2 [ main::screen ] ) always clobbers reg byte a 
+Potential registers zp[2]:2 [ main::screen ] : zp[2]:2 , 
+Potential registers mem[1] [ main::i ] : mem[1] , 
+
+REGISTER UPLIFT SCOPES
+Uplift Scope [main] 35: mem[1] [ main::i ] 7: zp[2]:2 [ main::screen ] 
+Uplift Scope [] 
+
+Uplifting [main] best 437 combination mem[1] [ main::i ] zp[2]:2 [ main::screen ] 
+Uplifting [] best 437 combination 
+Attempting to uplift remaining variables inmem[1] [ main::i ]
+Uplifting [main] best 437 combination mem[1] [ main::i ] 
+
+ASSEMBLER BEFORE OPTIMIZATION
+  // File Comments
+// Test memory model multiple-assignment/main memory for all non-pointer variables
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(__bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  // @begin
+__bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+__b1_from___bbegin:
+  jmp __b1
+  // @1
+__b1:
+  // [2] call main 
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+__bend_from___b1:
+  jmp __bend
+  // @end
+__bend:
+  // main
+main: {
+    .label screen = 2
+    // [4] (byte*) main::screen ← (byte*) 1024 -- pbuz1=pbuc1 
+    // A local pointer 
+    lda #<$400
+    sta.z screen
+    lda #>$400
+    sta.z screen+1
+    // [5] (byte) main::i ← (byte) 0 -- vbum1=vbuc1 
+    lda #0
+    sta i
+    jmp __b1
+  // A local counter
+    // main::@1
+  __b1:
+    // [6] *((byte*) main::screen) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
+    lda #'a'
+    ldy #0
+    sta (screen),y
+    // [7] (byte*) main::screen ← ++ (byte*) main::screen -- pbuz1=_inc_pbuz1 
+    inc.z screen
+    bne !+
+    inc.z screen+1
+  !:
+    // [8] (byte) main::i ← ++ (byte) main::i -- vbum1=_inc_vbum1 
+    inc i
+    // [9] if((byte) main::i!=(byte) 6) goto main::@1 -- vbum1_neq_vbuc1_then_la1 
+    lda #6
+    cmp i
+    bne __b1
+    jmp __breturn
+    // main::@return
+  __breturn:
+    // [10] return 
+    rts
+    i: .byte 0
+}
+  // 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 label __bbegin with __b1
+Removing instruction __bbegin:
+Removing instruction __b1_from___bbegin:
+Removing instruction __bend_from___b1:
+Succesful ASM optimization Pass5RedundantLabelElimination
+Removing instruction __bend:
+Removing instruction __breturn:
+Succesful ASM optimization Pass5UnusedLabelElimination
+Updating BasicUpstart to call main directly
+Removing instruction jsr main
+Succesful ASM optimization Pass5SkipBegin
+Removing instruction __b1:
+Succesful ASM optimization Pass5UnusedLabelElimination
+
+FINAL SYMBOL TABLE
+(label) @1
+(label) @begin
+(label) @end
+(void()) main()
+(label) main::@1
+(label) main::@return
+(byte) main::i loadstore mem[1] 35.0
+(byte*) main::screen loadstore zp[2]:2 7.000000000000001
+
+zp[2]:2 [ main::screen ]
+mem[1] [ main::i ]
+
+
+FINAL ASSEMBLER
+Score: 392
+
+  // File Comments
+// Test memory model multiple-assignment/main memory for all non-pointer variables
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+  // Global Constants & labels
+  // @begin
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+  // @1
+  // [2] call main 
+  // [3] phi from @1 to @end [phi:@1->@end]
+  // @end
+  // main
+main: {
+    .label screen = 2
+    // screen = 0x0400
+    // [4] (byte*) main::screen ← (byte*) 1024 -- pbuz1=pbuc1 
+    // A local pointer 
+    lda #<$400
+    sta.z screen
+    lda #>$400
+    sta.z screen+1
+    // for( char i: 0..5 )
+    // [5] (byte) main::i ← (byte) 0 -- vbum1=vbuc1 
+    lda #0
+    sta i
+  // A local counter
+    // main::@1
+  __b1:
+    // *(screen++) = 'a'
+    // [6] *((byte*) main::screen) ← (byte) 'a' -- _deref_pbuz1=vbuc1 
+    lda #'a'
+    ldy #0
+    sta (screen),y
+    // *(screen++) = 'a';
+    // [7] (byte*) main::screen ← ++ (byte*) main::screen -- pbuz1=_inc_pbuz1 
+    inc.z screen
+    bne !+
+    inc.z screen+1
+  !:
+    // for( char i: 0..5 )
+    // [8] (byte) main::i ← ++ (byte) main::i -- vbum1=_inc_vbum1 
+    inc i
+    // [9] if((byte) main::i!=(byte) 6) goto main::@1 -- vbum1_neq_vbuc1_then_la1 
+    lda #6
+    cmp i
+    bne __b1
+    // main::@return
+    // }
+    // [10] return 
+    rts
+    i: .byte 0
+}
+  // File Data
+

src/test/ref/varmodel-ma_mem-2.sym

@@ -0,0 +1,11 @@
+(label) @1
+(label) @begin
+(label) @end
+(void()) main()
+(label) main::@1
+(label) main::@return
+(byte) main::i loadstore mem[1] 35.0
+(byte*) main::screen loadstore zp[2]:2 7.000000000000001
+
+zp[2]:2 [ main::screen ]
+mem[1] [ main::i ]

src/test/ref/varmodel-ma_mem.asm

@@ -0,0 +1,27 @@
+// Test memory model multiple-assignment/main memory for all variables
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+main: {
+    lda #0
+    sta i
+  __b1:
+    lda #'a'
+    ldy screen
+    sty.z $fe
+    ldy screen+1
+    sty.z $ff
+    ldy #0
+    sta ($fe),y
+    inc screen
+    bne !+
+    inc screen+1
+  !:
+    inc i
+    lda #6
+    cmp i
+    bne __b1
+    rts
+    screen: .word $400
+    i: .byte 0
+}

src/test/ref/varmodel-ma_mem.cfg

@@ -0,0 +1,23 @@
+@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] (byte) main::i ← (byte) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  [5] *((byte*) main::screen) ← (byte) 'a'
+  [6] (byte*) main::screen ← ++ (byte*) main::screen
+  [7] (byte) main::i ← ++ (byte) main::i
+  [8] if((byte) main::i!=(byte) 6) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [9] return 
+  to:@return

src/test/ref/varmodel-ma_mem.log

@@ -0,0 +1,329 @@
+Culled Empty Block (label) main::@2
+
+CONTROL FLOW GRAPH SSA
+@begin: scope:[]  from
+  to:@1
+
+(void()) main()
+main: scope:[main]  from @1
+  (byte) main::i ← (byte) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  *((byte*) main::screen) ← (byte) 'a'
+  (byte*) main::screen ← ++ (byte*) main::screen
+  (byte) main::i ← (byte) main::i + rangenext(0,5)
+  (bool~) main::$0 ← (byte) main::i != rangelast(0,5)
+  if((bool~) main::$0) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  return 
+  to:@return
+@1: scope:[]  from @begin
+  call main 
+  to:@2
+@2: scope:[]  from @1
+  to:@end
+@end: scope:[]  from @2
+
+SYMBOL TABLE SSA
+(label) @1
+(label) @2
+(label) @begin
+(label) @end
+(void()) main()
+(bool~) main::$0
+(label) main::@1
+(label) main::@return
+(byte) main::i loadstore
+(byte*) main::screen loadstore = (byte*)(number) $400
+
+Simplifying constant pointer cast (byte*) 1024
+Successful SSA optimization PassNCastSimplification
+Simple Condition (bool~) main::$0 [5] if((byte) main::i!=rangelast(0,5)) goto main::@1
+Successful SSA optimization Pass2ConditionalJumpSimplification
+Resolved ranged next value [3] main::i ← ++ main::i to ++
+Resolved ranged comparison value [5] if(main::i!=rangelast(0,5)) goto main::@1 to (number) 6
+Adding number conversion cast (unumber) 6 in if((byte) main::i!=(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
+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
+CALL GRAPH
+Calls in [] to main:2 
+
+Created 0 initial phi equivalence classes
+Coalesced down to 0 phi equivalence classes
+Culled Empty Block (label) @2
+Adding NOP phi() at start of @begin
+Adding NOP phi() at start of @1
+Adding NOP phi() at start of @end
+
+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] (byte) main::i ← (byte) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@1
+  [5] *((byte*) main::screen) ← (byte) 'a'
+  [6] (byte*) main::screen ← ++ (byte*) main::screen
+  [7] (byte) main::i ← ++ (byte) main::i
+  [8] if((byte) main::i!=(byte) 6) goto main::@1
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [9] return 
+  to:@return
+
+
+VARIABLE REGISTER WEIGHTS
+(void()) main()
+(byte) main::i loadstore 35.0
+(byte*) main::screen loadstore 5.5 = (byte*) 1024
+
+Initial phi equivalence classes
+Added variable main::i to live range equivalence class [ main::i ]
+Added variable main::screen to live range equivalence class [ main::screen ]
+Complete equivalence classes
+[ main::i ]
+[ main::screen ]
+Allocated mem[1] [ main::i ]
+Allocated mem[2] [ main::screen ]
+
+INITIAL ASM
+Target platform is c64basic / MOS6502X
+  // File Comments
+// Test memory model multiple-assignment/main memory for all variables
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(__bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  // @begin
+__bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+__b1_from___bbegin:
+  jmp __b1
+  // @1
+__b1:
+  // [2] call main 
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+__bend_from___b1:
+  jmp __bend
+  // @end
+__bend:
+  // main
+main: {
+    // [4] (byte) main::i ← (byte) 0 -- vbum1=vbuc1 
+    lda #0
+    sta i
+    jmp __b1
+    // main::@1
+  __b1:
+    // [5] *((byte*) main::screen) ← (byte) 'a' -- _deref_pbum1=vbuc1 
+    lda #'a'
+    ldy screen
+    sty.z $fe
+    ldy screen+1
+    sty.z $ff
+    ldy #0
+    sta ($fe),y
+    // [6] (byte*) main::screen ← ++ (byte*) main::screen -- pbum1=_inc_pbum1 
+    inc screen
+    bne !+
+    inc screen+1
+  !:
+    // [7] (byte) main::i ← ++ (byte) main::i -- vbum1=_inc_vbum1 
+    inc i
+    // [8] if((byte) main::i!=(byte) 6) goto main::@1 -- vbum1_neq_vbuc1_then_la1 
+    lda #6
+    cmp i
+    bne __b1
+    jmp __breturn
+    // main::@return
+  __breturn:
+    // [9] return 
+    rts
+    screen: .word $400
+    i: .byte 0
+}
+  // File Data
+
+REGISTER UPLIFT POTENTIAL REGISTERS
+Statement [4] (byte) main::i ← (byte) 0 [ main::screen ] ( main:2 [ main::screen ] ) always clobbers reg byte a 
+Statement [5] *((byte*) main::screen) ← (byte) 'a' [ ] ( main:2 [ ] ) always clobbers reg byte a reg byte y 
+Statement [8] if((byte) main::i!=(byte) 6) goto main::@1 [ main::screen ] ( main:2 [ main::screen ] ) always clobbers reg byte a 
+Potential registers mem[1] [ main::i ] : mem[1] , 
+Potential registers mem[2] [ main::screen ] : mem[2] , 
+
+REGISTER UPLIFT SCOPES
+Uplift Scope [main] 35: mem[1] [ main::i ] 5.5: mem[2] [ main::screen ] 
+Uplift Scope [] 
+
+Uplifting [main] best 587 combination mem[1] [ main::i ] mem[2] [ main::screen ] 
+Uplifting [] best 587 combination 
+Attempting to uplift remaining variables inmem[1] [ main::i ]
+Uplifting [main] best 587 combination mem[1] [ main::i ] 
+
+ASSEMBLER BEFORE OPTIMIZATION
+  // File Comments
+// Test memory model multiple-assignment/main memory for all variables
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(__bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  // @begin
+__bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+__b1_from___bbegin:
+  jmp __b1
+  // @1
+__b1:
+  // [2] call main 
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+__bend_from___b1:
+  jmp __bend
+  // @end
+__bend:
+  // main
+main: {
+    // [4] (byte) main::i ← (byte) 0 -- vbum1=vbuc1 
+    lda #0
+    sta i
+    jmp __b1
+    // main::@1
+  __b1:
+    // [5] *((byte*) main::screen) ← (byte) 'a' -- _deref_pbum1=vbuc1 
+    lda #'a'
+    ldy screen
+    sty.z $fe
+    ldy screen+1
+    sty.z $ff
+    ldy #0
+    sta ($fe),y
+    // [6] (byte*) main::screen ← ++ (byte*) main::screen -- pbum1=_inc_pbum1 
+    inc screen
+    bne !+
+    inc screen+1
+  !:
+    // [7] (byte) main::i ← ++ (byte) main::i -- vbum1=_inc_vbum1 
+    inc i
+    // [8] if((byte) main::i!=(byte) 6) goto main::@1 -- vbum1_neq_vbuc1_then_la1 
+    lda #6
+    cmp i
+    bne __b1
+    jmp __breturn
+    // main::@return
+  __breturn:
+    // [9] return 
+    rts
+    screen: .word $400
+    i: .byte 0
+}
+  // 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 label __bbegin with __b1
+Removing instruction __bbegin:
+Removing instruction __b1_from___bbegin:
+Removing instruction __bend_from___b1:
+Succesful ASM optimization Pass5RedundantLabelElimination
+Removing instruction __bend:
+Removing instruction __breturn:
+Succesful ASM optimization Pass5UnusedLabelElimination
+Updating BasicUpstart to call main directly
+Removing instruction jsr main
+Succesful ASM optimization Pass5SkipBegin
+Removing instruction __b1:
+Succesful ASM optimization Pass5UnusedLabelElimination
+
+FINAL SYMBOL TABLE
+(label) @1
+(label) @begin
+(label) @end
+(void()) main()
+(label) main::@1
+(label) main::@return
+(byte) main::i loadstore mem[1] 35.0
+(byte*) main::screen loadstore mem[2] 5.5 = (byte*) 1024
+
+mem[1] [ main::i ]
+mem[2] [ main::screen ]
+
+
+FINAL ASSEMBLER
+Score: 542
+
+  // File Comments
+// Test memory model multiple-assignment/main memory for all variables
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+  // Global Constants & labels
+  // @begin
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+  // @1
+  // [2] call main 
+  // [3] phi from @1 to @end [phi:@1->@end]
+  // @end
+  // main
+main: {
+    // for( char i: 0..5 )
+    // [4] (byte) main::i ← (byte) 0 -- vbum1=vbuc1 
+    lda #0
+    sta i
+    // main::@1
+  __b1:
+    // *(screen++) = 'a'
+    // [5] *((byte*) main::screen) ← (byte) 'a' -- _deref_pbum1=vbuc1 
+    lda #'a'
+    ldy screen
+    sty.z $fe
+    ldy screen+1
+    sty.z $ff
+    ldy #0
+    sta ($fe),y
+    // *(screen++) = 'a';
+    // [6] (byte*) main::screen ← ++ (byte*) main::screen -- pbum1=_inc_pbum1 
+    inc screen
+    bne !+
+    inc screen+1
+  !:
+    // for( char i: 0..5 )
+    // [7] (byte) main::i ← ++ (byte) main::i -- vbum1=_inc_vbum1 
+    inc i
+    // [8] if((byte) main::i!=(byte) 6) goto main::@1 -- vbum1_neq_vbuc1_then_la1 
+    lda #6
+    cmp i
+    bne __b1
+    // main::@return
+    // }
+    // [9] return 
+    rts
+    screen: .word $400
+    i: .byte 0
+}
+  // File Data
+

src/test/ref/varmodel-ma_mem.sym

@@ -0,0 +1,11 @@
+(label) @1
+(label) @begin
+(label) @end
+(void()) main()
+(label) main::@1
+(label) main::@return
+(byte) main::i loadstore mem[1] 35.0
+(byte*) main::screen loadstore mem[2] 5.5 = (byte*) 1024
+
+mem[1] [ main::i ]
+mem[2] [ main::screen ]