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Implemented struct member unwinding when copying structs referenced through pointers/array indexing.

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This commit is contained in:
jespergravgaard 2019-06-10 22:49:21 +02:00
parent c8178378b2
commit 56c33cdac2
9 changed files with 888 additions and 51 deletions
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4
src/main/java/dk/camelot64/kickc/Compiler.java
View File

@ -169,8 +169,6 @@ public class Compiler {
new Pass1AssertReturn(program).execute();
new Pass1AssertUsedVars(program).execute();
new PassNSizeOfSimplification(program).execute(); // Needed to eliminate sizeof() referencing pointer value variables
new Pass1UnwindStructValues(program).execute();
if(getLog().isVerbosePass1CreateSsa()) {
getLog().append("SYMBOLS");
@ -180,6 +178,8 @@ public class Compiler {
new Pass1FixLValuesLoHi(program).execute();
new Pass1AssertNoLValueIntermediate(program).execute();
new Pass1PointerSizeofFix(program).execute(); // After this point in the code all pointer math is byte-based
new PassNSizeOfSimplification(program).execute(); // Needed to eliminate sizeof() referencing pointer value variables
new Pass1UnwindStructValues(program).execute();
new PassNStructPointerRewriting(program).execute();
new PassNAddBooleanCasts(program).execute();

212
src/main/java/dk/camelot64/kickc/passes/Pass1UnwindStructValues.java
View File

@ -3,11 +3,15 @@ package dk.camelot64.kickc.passes;
import dk.camelot64.kickc.model.*;
import dk.camelot64.kickc.model.InternalError;
import dk.camelot64.kickc.model.iterator.ProgramValueIterator;
import dk.camelot64.kickc.model.operators.Operators;
import dk.camelot64.kickc.model.statements.Statement;
import dk.camelot64.kickc.model.statements.StatementAssignment;
import dk.camelot64.kickc.model.statements.StatementCall;
import dk.camelot64.kickc.model.statements.StatementReturn;
import dk.camelot64.kickc.model.symbols.*;
import dk.camelot64.kickc.model.types.SymbolType;
import dk.camelot64.kickc.model.types.SymbolTypeInference;
import dk.camelot64.kickc.model.types.SymbolTypePointer;
import dk.camelot64.kickc.model.types.SymbolTypeStruct;
import dk.camelot64.kickc.model.values.*;
@ -54,11 +58,9 @@ public class Pass1UnwindStructValues extends Pass1Base {
Statement statement = stmtIt.next();
if(statement instanceof StatementAssignment) {
StatementAssignment assignment = (StatementAssignment) statement;
if(assignment.getlValue() instanceof VariableRef) {
Variable assignedVar = getScope().getVariable((VariableRef) assignment.getlValue());
if(assignedVar.getType() instanceof SymbolTypeStruct) {
modified |= unwindAssignment(assignment, assignedVar, stmtIt, structUnwinding);
}
SymbolType lValueType = SymbolTypeInference.inferType(getScope(), assignment.getlValue());
if(lValueType instanceof SymbolTypeStruct) {
modified |= unwindAssignment(assignment, (SymbolTypeStruct)lValueType, stmtIt, block, structUnwinding);
}
} else if(statement instanceof StatementCall) {
modified |= unwindCall((StatementCall) statement, structUnwinding);
@ -86,7 +88,7 @@ public class Pass1UnwindStructValues extends Pass1Base {
Variable structVariable = getScope().getVariable((VariableRef) structMemberRef.getStruct());
StructUnwinding.VariableUnwinding memberVariables = structUnwinding.getVariableUnwinding(structVariable.getRef());
if(memberVariables != null) {
VariableRef structMemberVariable = memberVariables.getMemberUnwinding(structMemberRef.getMemberName());
VariableRef structMemberVariable = (VariableRef) memberVariables.getMemberUnwinding(structMemberRef.getMemberName());
getLog().append("Replacing struct member reference " + structMemberRef.toString(getProgram()) + " with member variable reference " + structMemberVariable.toString(getProgram()));
programValue.set(structMemberVariable);
modified.set(true);
@ -200,7 +202,8 @@ public class Pass1UnwindStructValues extends Pass1Base {
if(parameter.getType() instanceof SymbolTypeStruct) {
StructUnwinding.VariableUnwinding parameterUnwinding = structUnwinding.getVariableUnwinding(parameter.getRef());
for(String memberName : parameterUnwinding.getMemberNames()) {
unwoundParameterNames.add(parameterUnwinding.getMemberUnwinding(memberName).getLocalName());
VariableRef memberUnwinding = (VariableRef) parameterUnwinding.getMemberUnwinding(memberName);
unwoundParameterNames.add(memberUnwinding.getLocalName());
procedureUnwound = true;
}
} else {
@ -258,20 +261,24 @@ public class Pass1UnwindStructValues extends Pass1Base {
* Unwind an assignment to a struct value variable into assignment of each member
*
* @param assignment The assignment statement
* @param assignedVar The struct value variable being assigned to (the LValue)
* @param structType The struct type being unwound
* @param stmtIt The statement iterator used for adding/removing statements
* @param currentBlock The current code block
* @param structUnwinding Information about unwound struct value variables
*/
private boolean unwindAssignment(StatementAssignment assignment, Variable assignedVar, ListIterator<Statement> stmtIt, StructUnwinding structUnwinding) {
private boolean unwindAssignment(StatementAssignment assignment, SymbolTypeStruct structType, ListIterator<Statement> stmtIt, ControlFlowBlock currentBlock, StructUnwinding structUnwinding) {
boolean modified = false;
// Assigning a struct!
if(assignment.getOperator() == null && assignment.getrValue2() instanceof StructZero) {
// Initializing a struct - unwind to assigning zero to each member!
StructUnwinding.VariableUnwinding variableUnwinding = structUnwinding.getVariableUnwinding(assignedVar.getRef());
if(variableUnwinding != null) {
StructMemberUnwinding memberUnwinding = getStructMemberUnwinding(assignment.getlValue(), structType, structUnwinding, assignment, stmtIt, currentBlock);
if(memberUnwinding==null) {
throw new CompileError("Cannot unwind struct assignment " + assignment.toString(getProgram(), false), assignment);
}
if(assignment.getOperator() == null && assignment.getrValue2() instanceof StructZero && assignment.getlValue() instanceof VariableRef) {
// Zero-initializing a struct - unwind to assigning zero to each member!
stmtIt.previous();
for(String memberName : variableUnwinding.getMemberNames()) {
VariableRef memberVarRef = variableUnwinding.getMemberUnwinding(memberName);
for(String memberName : memberUnwinding.getMemberNames()) {
VariableRef memberVarRef = (VariableRef) memberUnwinding.getMemberUnwinding(memberName);
Variable memberVar = getScope().getVariable(memberVarRef);
Statement initStmt = Pass0GenerateStatementSequence.createDefaultInitializationStatement(memberVarRef, memberVar.getType(), assignment.getSource(), Comment.NO_COMMENTS);
stmtIt.add(initStmt);
@ -280,18 +287,33 @@ public class Pass1UnwindStructValues extends Pass1Base {
stmtIt.next();
stmtIt.remove();
modified = true;
} else if(assignment.getOperator() == null && assignment.getrValue2() instanceof ValueList) {
// Initializing struct with a value list - unwind to assigning each member with a value from the list
ValueList valueList = (ValueList) assignment.getrValue2();
if(memberUnwinding.getMemberNames().size() != valueList.getList().size()) {
throw new CompileError("Struct initialization list has wrong size. Need " + memberUnwinding.getMemberNames().size() + " got " + valueList.getList().size(), assignment);
}
} else if(assignment.getOperator() == null && assignment.getrValue2() instanceof VariableRef) {
Variable sourceVar = getScope().getVariable((VariableRef) assignment.getrValue2());
if(sourceVar.getType().equals(assignedVar.getType())) {
stmtIt.previous();
int idx = 0;
for(String memberName : memberUnwinding.getMemberNames()) {
LValue memberLvalue = memberUnwinding.getMemberUnwinding(memberName);
Statement initStmt = new StatementAssignment(memberLvalue, valueList.getList().get(idx++), assignment.getSource(), Comment.NO_COMMENTS);
stmtIt.add(initStmt);
getLog().append("Adding struct value list initializer " + initStmt.toString(getProgram(), false));
}
stmtIt.next();
stmtIt.remove();
modified = true;
} else if(assignment.getOperator() == null) {
SymbolType sourceType = SymbolTypeInference.inferType(getScope(), assignment.getrValue2());
if(sourceType.equals(structType)) {
// Copying a struct - unwind to assigning each member!
StructUnwinding.VariableUnwinding assignedMemberVariables = structUnwinding.getVariableUnwinding(assignedVar.getRef());
StructUnwinding.VariableUnwinding sourceMemberVariables = structUnwinding.getVariableUnwinding(sourceVar.getRef());
if(assignedMemberVariables != null && sourceMemberVariables != null) {
StructMemberUnwinding sourceMemberUnwinding = getStructMemberUnwinding((LValue) assignment.getrValue2(), structType, structUnwinding, assignment, stmtIt, currentBlock);
if(sourceMemberUnwinding != null) {
stmtIt.previous();
for(String memberName : assignedMemberVariables.getMemberNames()) {
VariableRef assignedMemberVarRef = assignedMemberVariables.getMemberUnwinding(memberName);
VariableRef sourceMemberVarRef = sourceMemberVariables.getMemberUnwinding(memberName);
for(String memberName : memberUnwinding.getMemberNames()) {
LValue assignedMemberVarRef = memberUnwinding.getMemberUnwinding(memberName);
LValue sourceMemberVarRef = sourceMemberUnwinding.getMemberUnwinding(memberName);
Statement copyStmt = new StatementAssignment(assignedMemberVarRef, sourceMemberVarRef, assignment.getSource(), Comment.NO_COMMENTS);
stmtIt.add(copyStmt);
getLog().append("Adding struct value member variable copy " + copyStmt.toString(getProgram(), false));
@ -303,32 +325,45 @@ public class Pass1UnwindStructValues extends Pass1Base {
} else {
throw new CompileError("Incompatible struct assignment " + assignment.toString(getProgram(), false), assignment);
}
} else if(assignment.getOperator() == null && assignment.getrValue2() instanceof ValueList) {
// Initializing struct with individual values - unwind to assigning each member with a value from the list
StructUnwinding.VariableUnwinding variableUnwinding = structUnwinding.getVariableUnwinding(assignedVar.getRef());
if(variableUnwinding != null) {
ValueList valueList = (ValueList) assignment.getrValue2();
if(variableUnwinding.getMemberNames().size() != valueList.getList().size()) {
throw new CompileError("Struct initialization list has wrong size. Need " + variableUnwinding.getMemberNames().size() + " got " + valueList.getList().size(), assignment);
}
stmtIt.previous();
int idx = 0;
for(String memberName : variableUnwinding.getMemberNames()) {
VariableRef memberVarRef = variableUnwinding.getMemberUnwinding(memberName);
Statement initStmt = new StatementAssignment(memberVarRef, valueList.getList().get(idx++), assignment.getSource(), Comment.NO_COMMENTS);
stmtIt.add(initStmt);
getLog().append("Adding struct value list initializer " + initStmt.toString(getProgram(), false));
}
stmtIt.next();
stmtIt.remove();
modified = true;
}
} else {
throw new CompileError("Incompatible struct assignment " + assignment.toString(getProgram(), false), assignment);
}
return modified;
}
private StructMemberUnwinding getStructMemberUnwinding(LValue lValue, SymbolTypeStruct lValueType, StructUnwinding structUnwinding, Statement currentStmt, ListIterator<Statement> stmtIt, ControlFlowBlock currentBlock) {
if(lValue instanceof VariableRef) {
return structUnwinding.getVariableUnwinding((VariableRef) lValue);
} else if(lValue instanceof PointerDereferenceSimple) {
return new StructMemberUnwindingPointerDerefSimple((PointerDereferenceSimple) lValue, lValueType.getStructDefinition(getScope()), stmtIt, currentBlock, currentStmt);
} else if(lValue instanceof PointerDereferenceIndexed) {
return new StructMemberUnwindingPointerDerefIndexed((PointerDereferenceIndexed) lValue, lValueType.getStructDefinition(getScope()), stmtIt, currentBlock, currentStmt);
} else {
throw new InternalError("Struct unwinding not implemented for "+lValue.toString(getProgram()));
}
}
/** Information about how members of an struct Lvalue is unwound. */
interface StructMemberUnwinding {
/**
* Get the names of the members of the struct
*
* @return the names
*/
List<String> getMemberNames();
/**
* Get the LValue that a specific member was unwound to
*
* @param memberName The member name
* @return The unwinding of the member
*/
LValue getMemberUnwinding(String memberName);
}
/**
* Keeps track of all structs that have been unwound into member variables.
*/
@ -363,7 +398,7 @@ public class Pass1UnwindStructValues extends Pass1Base {
/** Information about how a single struct variable was unwound. */
static class VariableUnwinding {
static class VariableUnwinding implements StructMemberUnwinding {
/** Maps member names to the unwound variables. */
Map<String, VariableRef> memberUnwinding = new LinkedHashMap<>();
@ -378,7 +413,7 @@ public class Pass1UnwindStructValues extends Pass1Base {
*
* @return the names
*/
List<String> getMemberNames() {
public List<String> getMemberNames() {
return new ArrayList<>(memberUnwinding.keySet());
}
@ -388,12 +423,93 @@ public class Pass1UnwindStructValues extends Pass1Base {
* @param memberName The member name
* @return The new variable
*/
VariableRef getMemberUnwinding(String memberName) {
public LValue getMemberUnwinding(String memberName) {
return this.memberUnwinding.get(memberName);
}
}
}
/** Unwinding for a simple pointer deref to a struct. */
private class StructMemberUnwindingPointerDerefSimple implements StructMemberUnwinding {
private final StructDefinition structDefinition;
private final ControlFlowBlock currentBlock;
private final ListIterator<Statement> stmtIt;
private final PointerDereferenceSimple pointerDeref;
private final Statement currentStmt;
public StructMemberUnwindingPointerDerefSimple(PointerDereferenceSimple pointerDeref, StructDefinition structDefinition, ListIterator<Statement> stmtIt, ControlFlowBlock currentBlock, Statement currentStmt) {
this.structDefinition = structDefinition;
this.currentBlock = currentBlock;
this.stmtIt = stmtIt;
this.pointerDeref = pointerDeref;
this.currentStmt = currentStmt;
}
@Override
public List<String> getMemberNames() {
Collection<Variable> structMemberVars = structDefinition.getAllVariables(false);
ArrayList<String> memberNames = new ArrayList<>();
for(Variable structMemberVar : structMemberVars) {
memberNames.add(structMemberVar.getLocalName());
}
return memberNames;
}
@Override
public LValue getMemberUnwinding(String memberName) {
ConstantRef memberOffsetConstant = PassNStructPointerRewriting.getMemberOffsetConstant(getScope(), structDefinition, memberName);
Variable member = structDefinition.getMember(memberName);
Scope scope = getScope().getScope(currentBlock.getScope());
VariableIntermediate memberAddress = scope.addVariableIntermediate();
memberAddress.setType(new SymbolTypePointer(member.getType()));
CastValue structTypedPointer = new CastValue(new SymbolTypePointer(member.getType()), pointerDeref.getPointer());
// Add statement $1 = ptr_struct + OFFSET_STRUCT_NAME_MEMBER
stmtIt.add(new StatementAssignment(memberAddress.getRef(), structTypedPointer, Operators.PLUS, memberOffsetConstant, currentStmt.getSource(), currentStmt.getComments()));
// Unwind to *(ptr_struct+OFFSET_STRUCT_NAME_MEMBER)
return new PointerDereferenceSimple(memberAddress.getRef());
}
}
/** Unwinding for a indexed pointer deref to a struct. */
private class StructMemberUnwindingPointerDerefIndexed implements StructMemberUnwinding {
private final StructDefinition structDefinition;
private final ControlFlowBlock currentBlock;
private final ListIterator<Statement> stmtIt;
private final PointerDereferenceIndexed pointerDeref;
private final Statement currentStmt;
public StructMemberUnwindingPointerDerefIndexed(PointerDereferenceIndexed pointerDeref, StructDefinition structDefinition, ListIterator<Statement> stmtIt, ControlFlowBlock currentBlock, Statement currentStmt) {
this.structDefinition = structDefinition;
this.currentBlock = currentBlock;
this.stmtIt = stmtIt;
this.pointerDeref = pointerDeref;
this.currentStmt = currentStmt;
}
@Override
public List<String> getMemberNames() {
Collection<Variable> structMemberVars = structDefinition.getAllVariables(false);
ArrayList<String> memberNames = new ArrayList<>();
for(Variable structMemberVar : structMemberVars) {
memberNames.add(structMemberVar.getLocalName());
}
return memberNames;
}
@Override
public LValue getMemberUnwinding(String memberName) {
ConstantRef memberOffsetConstant = PassNStructPointerRewriting.getMemberOffsetConstant(getScope(), structDefinition, memberName);
Variable member = structDefinition.getMember(memberName);
Scope scope = getScope().getScope(currentBlock.getScope());
VariableIntermediate memberAddress = scope.addVariableIntermediate();
memberAddress.setType(new SymbolTypePointer(member.getType()));
CastValue structTypedPointer = new CastValue(new SymbolTypePointer(member.getType()), pointerDeref.getPointer());
// Add statement $1 = ptr_struct + OFFSET_STRUCT_NAME_MEMBER
stmtIt.add(new StatementAssignment(memberAddress.getRef(), structTypedPointer, Operators.PLUS, memberOffsetConstant, currentStmt.getSource(), currentStmt.getComments()));
// Unwind to *(ptr_struct+OFFSET_STRUCT_NAME_MEMBER[idx]
return new PointerDereferenceIndexed(memberAddress.getRef(), pointerDeref.getIndex());
}
}
}

2
src/main/java/dk/camelot64/kickc/passes/PassNStructPointerRewriting.java
View File

@ -92,7 +92,7 @@ public class PassNStructPointerRewriting extends Pass2SsaOptimization {
* @param memberName The name of the struct member
* @return The constant variable
*/
private static ConstantRef getMemberOffsetConstant(ProgramScope programScope, StructDefinition structDefinition, String memberName) {
public static ConstantRef getMemberOffsetConstant(ProgramScope programScope, StructDefinition structDefinition, String memberName) {
String typeConstName = getMemberOffsetConstantName(structDefinition, memberName);
ConstantVar memberOffsetConstant = programScope.getConstant(typeConstName);
if(memberOffsetConstant == null) {

5
src/test/java/dk/camelot64/kickc/test/TestPrograms.java
View File

@ -35,6 +35,11 @@ public class TestPrograms {
public TestPrograms() {
}
@Test
public void testStructPtr9() throws IOException, URISyntaxException {
compileAndCompare("struct-ptr-9");
}
@Test
public void testStructPtr8() throws IOException, URISyntaxException {
compileAndCompare("struct-ptr-8");

19
src/test/kc/struct-ptr-9.kc Normal file
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@ -0,0 +1,19 @@
// Minimal struct - array access with struct value copying (and initializing)
struct Point {
byte x;
byte y;
};
struct Point[2] points;
void main() {
for( byte i: 0..1) {
points[i] = { 2, i };
}
const struct Point* SCREEN = 0x0400;
for( byte i: 0..1) {
SCREEN[i] = points[i];
}
}

34
src/test/ref/struct-ptr-9.asm Normal file
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@ -0,0 +1,34 @@
// Minimal struct - array access with struct value copying (and initializing)
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
.const OFFSET_STRUCT_POINT_Y = 1
main: {
.label SCREEN = $400
ldy #0
b1:
tya
asl
tax
lda #2
sta points,x
tya
sta points+OFFSET_STRUCT_POINT_Y,x
iny
cpy #2
bne b1
ldx #0
b2:
txa
asl
tay
lda points,y
sta SCREEN,y
lda points+OFFSET_STRUCT_POINT_Y,y
sta SCREEN+OFFSET_STRUCT_POINT_Y,y
inx
cpx #2
bne b2
rts
}
points: .fill 2*2, 0

31
src/test/ref/struct-ptr-9.cfg Normal file
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@ -0,0 +1,31 @@
@begin: scope:[] from
[0] phi()
to:@1
@1: scope:[] from @begin
[1] phi()
[2] call main
to:@end
@end: scope:[] from @1
[3] phi()
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 )
[6] (byte~) main::$2 ← (byte) main::i#2 << (byte) 1
[7] *((byte*)(const struct Point[2]) points#0 + (byte~) main::$2) ← (byte) 2
[8] *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$2) ← (byte) main::i#2
[9] (byte) main::i#1 ← ++ (byte) main::i#2
[10] if((byte) main::i#1!=(byte) 2) goto main::@1
to:main::@2
main::@2: scope:[main] from main::@1 main::@2
[11] (byte) main::i1#2 ← phi( main::@1/(byte) 0 main::@2/(byte) main::i1#1 )
[12] (byte~) main::$3 ← (byte) main::i1#2 << (byte) 1
[13] *((byte*)(const struct Point*) main::SCREEN#0 + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0 + (byte~) main::$3)
[14] *((byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3)
[15] (byte) main::i1#1 ← ++ (byte) main::i1#2
[16] if((byte) main::i1#1!=(byte) 2) goto main::@2
to:main::@return
main::@return: scope:[main] from main::@2
[17] return
to:@return

605
src/test/ref/struct-ptr-9.log Normal file
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@ -0,0 +1,605 @@
Fixing pointer array-indexing *((struct Point[2]) points + (byte) main::i)
Fixing pointer array-indexing *((struct Point[2]) points + (byte) main::i1)
Fixing pointer array-indexing *((struct Point*) main::SCREEN + (byte) main::i1)
Adding struct value list initializer *((byte*) main::$4 + (byte~) main::$2) ← (number) 2
Adding struct value list initializer *((byte*) main::$5 + (byte~) main::$2) ← (byte) main::i
Adding struct value member variable copy *((byte*) main::$6 + (byte~) main::$3) ← *((byte*) main::$7 + (byte~) main::$3)
Adding struct value member variable copy *((byte*) main::$8 + (byte~) main::$3) ← *((byte*) main::$9 + (byte~) main::$3)
Adding pointer type conversion cast (struct Point*) main::SCREEN in (struct Point*) main::SCREEN ← (number) $400
Culled Empty Block (label) main::@4
CONTROL FLOW GRAPH SSA
@begin: scope:[] from
(struct Point[2]) points#0 ← { fill( 2, 0) }
to:@1
main: scope:[main] from @1
(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~) main::$2 ← (byte) main::i#2 * (const byte) SIZEOF_STRUCT_POINT
(byte*) main::$4 ← (byte*)(struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_X
*((byte*) main::$4 + (byte~) main::$2) ← (number) 2
(byte*) main::$5 ← (byte*)(struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_Y
*((byte*) main::$5 + (byte~) main::$2) ← (byte) main::i#2
(byte) main::i#1 ← (byte) main::i#2 + rangenext(0,1)
(bool~) main::$0 ← (byte) main::i#1 != rangelast(0,1)
if((bool~) main::$0) goto main::@1
to:main::@2
main::@2: scope:[main] from main::@1
(struct Point*) main::SCREEN#0 ← ((struct Point*)) (number) $400
(byte) main::i1#0 ← (byte) 0
to:main::@3
main::@3: scope:[main] from main::@2 main::@3
(byte) main::i1#2 ← phi( main::@2/(byte) main::i1#0 main::@3/(byte) main::i1#1 )
(byte~) main::$3 ← (byte) main::i1#2 * (const byte) SIZEOF_STRUCT_POINT
(byte*) main::$6 ← (byte*)(struct Point*) main::SCREEN#0 + (const byte) OFFSET_STRUCT_POINT_X
(byte*) main::$7 ← (byte*)(struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_X
*((byte*) main::$6 + (byte~) main::$3) ← *((byte*) main::$7 + (byte~) main::$3)
(byte*) main::$8 ← (byte*)(struct Point*) main::SCREEN#0 + (const byte) OFFSET_STRUCT_POINT_Y
(byte*) main::$9 ← (byte*)(struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_Y
*((byte*) main::$8 + (byte~) main::$3) ← *((byte*) main::$9 + (byte~) main::$3)
(byte) main::i1#1 ← (byte) main::i1#2 + rangenext(0,1)
(bool~) main::$1 ← (byte) main::i1#1 != rangelast(0,1)
if((bool~) main::$1) goto main::@3
to:main::@return
main::@return: scope:[main] from main::@3
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
(const byte) OFFSET_STRUCT_POINT_X = (byte) 0
(const byte) OFFSET_STRUCT_POINT_Y = (byte) 1
(byte) Point::x
(byte) Point::y
(const byte) SIZEOF_STRUCT_POINT = (byte) 2
(void()) main()
(bool~) main::$0
(bool~) main::$1
(byte~) main::$2
(byte~) main::$3
(byte*) main::$4
(byte*) main::$5
(byte*) main::$6
(byte*) main::$7
(byte*) main::$8
(byte*) main::$9
(label) main::@1
(label) main::@2
(label) main::@3
(label) main::@return
(struct Point*) main::SCREEN
(struct Point*) main::SCREEN#0
(byte) main::i
(byte) main::i#0
(byte) main::i#1
(byte) main::i#2
(byte) main::i1
(byte) main::i1#0
(byte) main::i1#1
(byte) main::i1#2
(struct Point[2]) points
(struct Point[2]) points#0
Adding number conversion cast (unumber) 2 in *((byte*) main::$4 + (byte~) main::$2) ← (number) 2
Successful SSA optimization PassNAddNumberTypeConversions
Inlining cast *((byte*) main::$4 + (byte~) main::$2) ← (unumber)(number) 2
Inlining cast (struct Point*) main::SCREEN#0 ← (struct Point*)(number) $400
Successful SSA optimization Pass2InlineCast
Simplifying constant integer cast 2
Simplifying constant pointer cast (struct Point*) 1024
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 2
Successful SSA optimization PassNFinalizeNumberTypeConversions
Simple Condition (bool~) main::$0 [10] if((byte) main::i#1!=rangelast(0,1)) goto main::@1
Simple Condition (bool~) main::$1 [23] if((byte) main::i1#1!=rangelast(0,1)) goto main::@3
Successful SSA optimization Pass2ConditionalJumpSimplification
Constant right-side identified [0] (struct Point[2]) points#0 ← { fill( 2, 0) }
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant (const struct Point[2]) points#0 = { fill( 2, 0) }
Constant (const byte) main::i#0 = 0
Constant (const struct Point*) main::SCREEN#0 = (struct Point*) 1024
Constant (const byte) main::i1#0 = 0
Successful SSA optimization Pass2ConstantIdentification
Constant value identified (byte*)points#0 in [4] (byte*) main::$4 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_X
Constant value identified (byte*)points#0 in [6] (byte*) main::$5 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_Y
Constant value identified (byte*)main::SCREEN#0 in [15] (byte*) main::$6 ← (byte*)(const struct Point*) main::SCREEN#0 + (const byte) OFFSET_STRUCT_POINT_X
Constant value identified (byte*)points#0 in [16] (byte*) main::$7 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_X
Constant value identified (byte*)main::SCREEN#0 in [18] (byte*) main::$8 ← (byte*)(const struct Point*) main::SCREEN#0 + (const byte) OFFSET_STRUCT_POINT_Y
Constant value identified (byte*)points#0 in [19] (byte*) main::$9 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_Y
Successful SSA optimization Pass2ConstantValues
Resolved ranged next value [8] main::i#1 ← ++ main::i#2 to ++
Resolved ranged comparison value [10] if(main::i#1!=rangelast(0,1)) goto main::@1 to (number) 2
Resolved ranged next value [21] main::i1#1 ← ++ main::i1#2 to ++
Resolved ranged comparison value [23] if(main::i1#1!=rangelast(0,1)) goto main::@3 to (number) 2
Simplifying expression containing zero (byte*)points#0 in [4] (byte*) main::$4 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_X
Simplifying expression containing zero (byte*)main::SCREEN#0 in [15] (byte*) main::$6 ← (byte*)(const struct Point*) main::SCREEN#0 + (const byte) OFFSET_STRUCT_POINT_X
Simplifying expression containing zero (byte*)points#0 in [16] (byte*) main::$7 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_X
Successful SSA optimization PassNSimplifyExpressionWithZero
Eliminating unused constant (const byte) OFFSET_STRUCT_POINT_X
Successful SSA optimization PassNEliminateUnusedVars
Adding number conversion cast (unumber) 2 in if((byte) main::i#1!=(number) 2) goto main::@1
Adding number conversion cast (unumber) 2 in if((byte) main::i1#1!=(number) 2) goto main::@3
Successful SSA optimization PassNAddNumberTypeConversions
Simplifying constant integer cast 2
Simplifying constant integer cast 2
Successful SSA optimization PassNCastSimplification
Finalized unsigned number type (byte) 2
Finalized unsigned number type (byte) 2
Successful SSA optimization PassNFinalizeNumberTypeConversions
Constant right-side identified [4] (byte*) main::$5 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_Y
Constant right-side identified [13] (byte*) main::$8 ← (byte*)(const struct Point*) main::SCREEN#0 + (const byte) OFFSET_STRUCT_POINT_Y
Constant right-side identified [14] (byte*) main::$9 ← (byte*)(const struct Point[2]) points#0 + (const byte) OFFSET_STRUCT_POINT_Y
Successful SSA optimization Pass2ConstantRValueConsolidation
Constant (const byte*) main::$4 = (byte*)points#0
Constant (const byte*) main::$5 = (byte*)points#0+OFFSET_STRUCT_POINT_Y
Constant (const byte*) main::$6 = (byte*)main::SCREEN#0
Constant (const byte*) main::$7 = (byte*)points#0
Constant (const byte*) main::$8 = (byte*)main::SCREEN#0+OFFSET_STRUCT_POINT_Y
Constant (const byte*) main::$9 = (byte*)points#0+OFFSET_STRUCT_POINT_Y
Successful SSA optimization Pass2ConstantIdentification
Rewriting multiplication to use shift [1] (byte~) main::$2 ← (byte) main::i#2 * (const byte) SIZEOF_STRUCT_POINT
Rewriting multiplication to use shift [7] (byte~) main::$3 ← (byte) main::i1#2 * (const byte) SIZEOF_STRUCT_POINT
Successful SSA optimization Pass2MultiplyToShiftRewriting
Inlining constant with var siblings (const byte) main::i#0
Inlining constant with var siblings (const byte) main::i1#0
Constant inlined main::$5 = (byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y
Constant inlined main::i#0 = (byte) 0
Constant inlined main::i1#0 = (byte) 0
Constant inlined main::$6 = (byte*)(const struct Point*) main::SCREEN#0
Constant inlined main::$4 = (byte*)(const struct Point[2]) points#0
Constant inlined main::$9 = (byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y
Constant inlined main::$7 = (byte*)(const struct Point[2]) points#0
Constant inlined main::$8 = (byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y
Successful SSA optimization Pass2ConstantInlining
Eliminating unused constant (const byte) SIZEOF_STRUCT_POINT
Successful SSA optimization PassNEliminateUnusedVars
Added new block during phi lifting main::@5(between main::@1 and main::@1)
Added new block during phi lifting main::@6(between main::@3 and main::@3)
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
Adding NOP phi() at start of main::@2
CALL GRAPH
Calls in [] to main:2
Created 2 initial phi equivalence classes
Coalesced [20] main::i1#3 ← main::i1#1
Coalesced [21] main::i#3 ← main::i#1
Coalesced down to 2 phi equivalence classes
Culled Empty Block (label) @2
Culled Empty Block (label) main::@2
Culled Empty Block (label) main::@6
Culled Empty Block (label) main::@5
Renumbering block main::@3 to main::@2
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()
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 )
[6] (byte~) main::$2 ← (byte) main::i#2 << (byte) 1
[7] *((byte*)(const struct Point[2]) points#0 + (byte~) main::$2) ← (byte) 2
[8] *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$2) ← (byte) main::i#2
[9] (byte) main::i#1 ← ++ (byte) main::i#2
[10] if((byte) main::i#1!=(byte) 2) goto main::@1
to:main::@2
main::@2: scope:[main] from main::@1 main::@2
[11] (byte) main::i1#2 ← phi( main::@1/(byte) 0 main::@2/(byte) main::i1#1 )
[12] (byte~) main::$3 ← (byte) main::i1#2 << (byte) 1
[13] *((byte*)(const struct Point*) main::SCREEN#0 + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0 + (byte~) main::$3)
[14] *((byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3)
[15] (byte) main::i1#1 ← ++ (byte) main::i1#2
[16] if((byte) main::i1#1!=(byte) 2) goto main::@2
to:main::@return
main::@return: scope:[main] from main::@2
[17] return
to:@return
VARIABLE REGISTER WEIGHTS
(byte) Point::x
(byte) Point::y
(void()) main()
(byte~) main::$2 16.5
(byte~) main::$3 27.5
(struct Point*) main::SCREEN
(byte) main::i
(byte) main::i#1 16.5
(byte) main::i#2 11.0
(byte) main::i1
(byte) main::i1#1 16.5
(byte) main::i1#2 8.25
(struct Point[2]) points
Initial phi equivalence classes
[ main::i#2 main::i#1 ]
[ main::i1#2 main::i1#1 ]
Added variable main::$2 to zero page equivalence class [ main::$2 ]
Added variable main::$3 to zero page equivalence class [ main::$3 ]
Complete equivalence classes
[ main::i#2 main::i#1 ]
[ main::i1#2 main::i1#1 ]
[ main::$2 ]
[ main::$3 ]
Allocated zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Allocated zp ZP_BYTE:3 [ main::i1#2 main::i1#1 ]
Allocated zp ZP_BYTE:4 [ main::$2 ]
Allocated zp ZP_BYTE:5 [ main::$3 ]
INITIAL ASM
//SEG0 File Comments
// Minimal struct - array access with struct value copying (and initializing)
//SEG1 Basic Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
//SEG2 Global Constants & labels
.const OFFSET_STRUCT_POINT_Y = 1
//SEG3 @begin
bbegin:
//SEG4 [1] phi from @begin to @1 [phi:@begin->@1]
b1_from_bbegin:
jmp b1
//SEG5 @1
b1:
//SEG6 [2] call main
//SEG7 [4] phi from @1 to main [phi:@1->main]
main_from_b1:
jsr main
//SEG8 [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
jmp bend
//SEG9 @end
bend:
//SEG10 main
main: {
.label SCREEN = $400
.label _2 = 4
.label _3 = 5
.label i = 2
.label i1 = 3
//SEG11 [5] phi from main to main::@1 [phi:main->main::@1]
b1_from_main:
//SEG12 [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuz1=vbuc1
lda #0
sta i
jmp b1
//SEG13 [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
b1_from_b1:
//SEG14 [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@1->main::@1#0] -- register_copy
jmp b1
//SEG15 main::@1
b1:
//SEG16 [6] (byte~) main::$2 ← (byte) main::i#2 << (byte) 1 -- vbuz1=vbuz2_rol_1
lda i
asl
sta _2
//SEG17 [7] *((byte*)(const struct Point[2]) points#0 + (byte~) main::$2) ← (byte) 2 -- pbuc1_derefidx_vbuz1=vbuc2
lda #2
ldy _2
sta points,y
//SEG18 [8] *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$2) ← (byte) main::i#2 -- pbuc1_derefidx_vbuz1=vbuz2
lda i
ldy _2
sta points+OFFSET_STRUCT_POINT_Y,y
//SEG19 [9] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuz1=_inc_vbuz1
inc i
//SEG20 [10] if((byte) main::i#1!=(byte) 2) goto main::@1 -- vbuz1_neq_vbuc1_then_la1
lda #2
cmp i
bne b1_from_b1
//SEG21 [11] phi from main::@1 to main::@2 [phi:main::@1->main::@2]
b2_from_b1:
//SEG22 [11] phi (byte) main::i1#2 = (byte) 0 [phi:main::@1->main::@2#0] -- vbuz1=vbuc1
lda #0
sta i1
jmp b2
//SEG23 [11] phi from main::@2 to main::@2 [phi:main::@2->main::@2]
b2_from_b2:
//SEG24 [11] phi (byte) main::i1#2 = (byte) main::i1#1 [phi:main::@2->main::@2#0] -- register_copy
jmp b2
//SEG25 main::@2
b2:
//SEG26 [12] (byte~) main::$3 ← (byte) main::i1#2 << (byte) 1 -- vbuz1=vbuz2_rol_1
lda i1
asl
sta _3
//SEG27 [13] *((byte*)(const struct Point*) main::SCREEN#0 + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0 + (byte~) main::$3) -- pbuc1_derefidx_vbuz1=pbuc2_derefidx_vbuz1
ldy _3
lda points,y
sta SCREEN,y
//SEG28 [14] *((byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) -- pbuc1_derefidx_vbuz1=pbuc2_derefidx_vbuz1
ldy _3
lda points+OFFSET_STRUCT_POINT_Y,y
sta SCREEN+OFFSET_STRUCT_POINT_Y,y
//SEG29 [15] (byte) main::i1#1 ← ++ (byte) main::i1#2 -- vbuz1=_inc_vbuz1
inc i1
//SEG30 [16] if((byte) main::i1#1!=(byte) 2) goto main::@2 -- vbuz1_neq_vbuc1_then_la1
lda #2
cmp i1
bne b2_from_b2
jmp breturn
//SEG31 main::@return
breturn:
//SEG32 [17] return
rts
}
points: .fill 2*2, 0
REGISTER UPLIFT POTENTIAL REGISTERS
Statement [6] (byte~) main::$2 ← (byte) main::i#2 << (byte) 1 [ main::i#2 main::$2 ] ( main:2 [ main::i#2 main::$2 ] ) always clobbers reg byte a
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:2 [ main::i#2 main::i#1 ]
Statement [7] *((byte*)(const struct Point[2]) points#0 + (byte~) main::$2) ← (byte) 2 [ main::i#2 main::$2 ] ( main:2 [ main::i#2 main::$2 ] ) always clobbers reg byte a
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:4 [ main::$2 ]
Statement [8] *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$2) ← (byte) main::i#2 [ main::i#2 ] ( main:2 [ main::i#2 ] ) always clobbers reg byte a
Statement [12] (byte~) main::$3 ← (byte) main::i1#2 << (byte) 1 [ main::i1#2 main::$3 ] ( main:2 [ main::i1#2 main::$3 ] ) always clobbers reg byte a
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:3 [ main::i1#2 main::i1#1 ]
Statement [13] *((byte*)(const struct Point*) main::SCREEN#0 + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0 + (byte~) main::$3) [ main::i1#2 main::$3 ] ( main:2 [ main::i1#2 main::$3 ] ) always clobbers reg byte a
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:5 [ main::$3 ]
Statement [14] *((byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) [ main::i1#2 ] ( main:2 [ main::i1#2 ] ) always clobbers reg byte a
Statement [6] (byte~) main::$2 ← (byte) main::i#2 << (byte) 1 [ main::i#2 main::$2 ] ( main:2 [ main::i#2 main::$2 ] ) always clobbers reg byte a
Statement [7] *((byte*)(const struct Point[2]) points#0 + (byte~) main::$2) ← (byte) 2 [ main::i#2 main::$2 ] ( main:2 [ main::i#2 main::$2 ] ) always clobbers reg byte a
Statement [8] *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$2) ← (byte) main::i#2 [ main::i#2 ] ( main:2 [ main::i#2 ] ) always clobbers reg byte a
Statement [12] (byte~) main::$3 ← (byte) main::i1#2 << (byte) 1 [ main::i1#2 main::$3 ] ( main:2 [ main::i1#2 main::$3 ] ) always clobbers reg byte a
Statement [13] *((byte*)(const struct Point*) main::SCREEN#0 + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0 + (byte~) main::$3) [ main::i1#2 main::$3 ] ( main:2 [ main::i1#2 main::$3 ] ) always clobbers reg byte a
Statement [14] *((byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) [ main::i1#2 ] ( main:2 [ main::i1#2 ] ) always clobbers reg byte a
Potential registers zp ZP_BYTE:2 [ main::i#2 main::i#1 ] : zp ZP_BYTE:2 , reg byte x , reg byte y ,
Potential registers zp ZP_BYTE:3 [ main::i1#2 main::i1#1 ] : zp ZP_BYTE:3 , reg byte x , reg byte y ,
Potential registers zp ZP_BYTE:4 [ main::$2 ] : zp ZP_BYTE:4 , reg byte x , reg byte y ,
Potential registers zp ZP_BYTE:5 [ main::$3 ] : zp ZP_BYTE:5 , reg byte x , reg byte y ,
REGISTER UPLIFT SCOPES
Uplift Scope [main] 27.5: zp ZP_BYTE:2 [ main::i#2 main::i#1 ] 27.5: zp ZP_BYTE:5 [ main::$3 ] 24.75: zp ZP_BYTE:3 [ main::i1#2 main::i1#1 ] 16.5: zp ZP_BYTE:4 [ main::$2 ]
Uplift Scope [Point]
Uplift Scope []
Uplifting [main] best 788 combination reg byte y [ main::i#2 main::i#1 ] reg byte y [ main::$3 ] reg byte x [ main::i1#2 main::i1#1 ] reg byte x [ main::$2 ]
Uplifting [Point] best 788 combination
Uplifting [] best 788 combination
ASSEMBLER BEFORE OPTIMIZATION
//SEG0 File Comments
// Minimal struct - array access with struct value copying (and initializing)
//SEG1 Basic Upstart
.pc = $801 "Basic"
:BasicUpstart(bbegin)
.pc = $80d "Program"
//SEG2 Global Constants & labels
.const OFFSET_STRUCT_POINT_Y = 1
//SEG3 @begin
bbegin:
//SEG4 [1] phi from @begin to @1 [phi:@begin->@1]
b1_from_bbegin:
jmp b1
//SEG5 @1
b1:
//SEG6 [2] call main
//SEG7 [4] phi from @1 to main [phi:@1->main]
main_from_b1:
jsr main
//SEG8 [3] phi from @1 to @end [phi:@1->@end]
bend_from_b1:
jmp bend
//SEG9 @end
bend:
//SEG10 main
main: {
.label SCREEN = $400
//SEG11 [5] phi from main to main::@1 [phi:main->main::@1]
b1_from_main:
//SEG12 [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuyy=vbuc1
ldy #0
jmp b1
//SEG13 [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
b1_from_b1:
//SEG14 [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@1->main::@1#0] -- register_copy
jmp b1
//SEG15 main::@1
b1:
//SEG16 [6] (byte~) main::$2 ← (byte) main::i#2 << (byte) 1 -- vbuxx=vbuyy_rol_1
tya
asl
tax
//SEG17 [7] *((byte*)(const struct Point[2]) points#0 + (byte~) main::$2) ← (byte) 2 -- pbuc1_derefidx_vbuxx=vbuc2
lda #2
sta points,x
//SEG18 [8] *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$2) ← (byte) main::i#2 -- pbuc1_derefidx_vbuxx=vbuyy
tya
sta points+OFFSET_STRUCT_POINT_Y,x
//SEG19 [9] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuyy=_inc_vbuyy
iny
//SEG20 [10] if((byte) main::i#1!=(byte) 2) goto main::@1 -- vbuyy_neq_vbuc1_then_la1
cpy #2
bne b1_from_b1
//SEG21 [11] phi from main::@1 to main::@2 [phi:main::@1->main::@2]
b2_from_b1:
//SEG22 [11] phi (byte) main::i1#2 = (byte) 0 [phi:main::@1->main::@2#0] -- vbuxx=vbuc1
ldx #0
jmp b2
//SEG23 [11] phi from main::@2 to main::@2 [phi:main::@2->main::@2]
b2_from_b2:
//SEG24 [11] phi (byte) main::i1#2 = (byte) main::i1#1 [phi:main::@2->main::@2#0] -- register_copy
jmp b2
//SEG25 main::@2
b2:
//SEG26 [12] (byte~) main::$3 ← (byte) main::i1#2 << (byte) 1 -- vbuyy=vbuxx_rol_1
txa
asl
tay
//SEG27 [13] *((byte*)(const struct Point*) main::SCREEN#0 + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0 + (byte~) main::$3) -- pbuc1_derefidx_vbuyy=pbuc2_derefidx_vbuyy
lda points,y
sta SCREEN,y
//SEG28 [14] *((byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) -- pbuc1_derefidx_vbuyy=pbuc2_derefidx_vbuyy
lda points+OFFSET_STRUCT_POINT_Y,y
sta SCREEN+OFFSET_STRUCT_POINT_Y,y
//SEG29 [15] (byte) main::i1#1 ← ++ (byte) main::i1#2 -- vbuxx=_inc_vbuxx
inx
//SEG30 [16] if((byte) main::i1#1!=(byte) 2) goto main::@2 -- vbuxx_neq_vbuc1_then_la1
cpx #2
bne b2_from_b2
jmp breturn
//SEG31 main::@return
breturn:
//SEG32 [17] return
rts
}
points: .fill 2*2, 0
ASSEMBLER OPTIMIZATIONS
Removing instruction jmp b1
Removing instruction jmp bend
Removing instruction jmp b1
Removing instruction jmp b2
Removing instruction jmp breturn
Succesful ASM optimization Pass5NextJumpElimination
Replacing label b1_from_b1 with b1
Replacing label b2_from_b2 with b2
Removing instruction b1_from_bbegin:
Removing instruction b1:
Removing instruction main_from_b1:
Removing instruction bend_from_b1:
Removing instruction b1_from_b1:
Removing instruction b2_from_b2:
Succesful ASM optimization Pass5RedundantLabelElimination
Removing instruction bend:
Removing instruction b1_from_main:
Removing instruction b2_from_b1:
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
Removing instruction jmp b2
Succesful ASM optimization Pass5NextJumpElimination
Removing instruction bbegin:
Succesful ASM optimization Pass5UnusedLabelElimination
FINAL SYMBOL TABLE
(label) @1
(label) @begin
(label) @end
(const byte) OFFSET_STRUCT_POINT_Y OFFSET_STRUCT_POINT_Y = (byte) 1
(byte) Point::x
(byte) Point::y
(void()) main()
(byte~) main::$2 reg byte x 16.5
(byte~) main::$3 reg byte y 27.5
(label) main::@1
(label) main::@2
(label) main::@return
(struct Point*) main::SCREEN
(const struct Point*) main::SCREEN#0 SCREEN = (struct Point*) 1024
(byte) main::i
(byte) main::i#1 reg byte y 16.5
(byte) main::i#2 reg byte y 11.0
(byte) main::i1
(byte) main::i1#1 reg byte x 16.5
(byte) main::i1#2 reg byte x 8.25
(struct Point[2]) points
(const struct Point[2]) points#0 points = { fill( 2, 0) }
reg byte y [ main::i#2 main::i#1 ]
reg byte x [ main::i1#2 main::i1#1 ]
reg byte x [ main::$2 ]
reg byte y [ main::$3 ]
FINAL ASSEMBLER
Score: 626
//SEG0 File Comments
// Minimal struct - array access with struct value copying (and initializing)
//SEG1 Basic Upstart
.pc = $801 "Basic"
:BasicUpstart(main)
.pc = $80d "Program"
//SEG2 Global Constants & labels
.const OFFSET_STRUCT_POINT_Y = 1
//SEG3 @begin
//SEG4 [1] phi from @begin to @1 [phi:@begin->@1]
//SEG5 @1
//SEG6 [2] call main
//SEG7 [4] phi from @1 to main [phi:@1->main]
//SEG8 [3] phi from @1 to @end [phi:@1->@end]
//SEG9 @end
//SEG10 main
main: {
.label SCREEN = $400
//SEG11 [5] phi from main to main::@1 [phi:main->main::@1]
//SEG12 [5] phi (byte) main::i#2 = (byte) 0 [phi:main->main::@1#0] -- vbuyy=vbuc1
ldy #0
//SEG13 [5] phi from main::@1 to main::@1 [phi:main::@1->main::@1]
//SEG14 [5] phi (byte) main::i#2 = (byte) main::i#1 [phi:main::@1->main::@1#0] -- register_copy
//SEG15 main::@1
b1:
//SEG16 [6] (byte~) main::$2 ← (byte) main::i#2 << (byte) 1 -- vbuxx=vbuyy_rol_1
tya
asl
tax
//SEG17 [7] *((byte*)(const struct Point[2]) points#0 + (byte~) main::$2) ← (byte) 2 -- pbuc1_derefidx_vbuxx=vbuc2
lda #2
sta points,x
//SEG18 [8] *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$2) ← (byte) main::i#2 -- pbuc1_derefidx_vbuxx=vbuyy
tya
sta points+OFFSET_STRUCT_POINT_Y,x
//SEG19 [9] (byte) main::i#1 ← ++ (byte) main::i#2 -- vbuyy=_inc_vbuyy
iny
//SEG20 [10] if((byte) main::i#1!=(byte) 2) goto main::@1 -- vbuyy_neq_vbuc1_then_la1
cpy #2
bne b1
//SEG21 [11] phi from main::@1 to main::@2 [phi:main::@1->main::@2]
//SEG22 [11] phi (byte) main::i1#2 = (byte) 0 [phi:main::@1->main::@2#0] -- vbuxx=vbuc1
ldx #0
//SEG23 [11] phi from main::@2 to main::@2 [phi:main::@2->main::@2]
//SEG24 [11] phi (byte) main::i1#2 = (byte) main::i1#1 [phi:main::@2->main::@2#0] -- register_copy
//SEG25 main::@2
b2:
//SEG26 [12] (byte~) main::$3 ← (byte) main::i1#2 << (byte) 1 -- vbuyy=vbuxx_rol_1
txa
asl
tay
//SEG27 [13] *((byte*)(const struct Point*) main::SCREEN#0 + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0 + (byte~) main::$3) -- pbuc1_derefidx_vbuyy=pbuc2_derefidx_vbuyy
lda points,y
sta SCREEN,y
//SEG28 [14] *((byte*)(const struct Point*) main::SCREEN#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) ← *((byte*)(const struct Point[2]) points#0+(const byte) OFFSET_STRUCT_POINT_Y + (byte~) main::$3) -- pbuc1_derefidx_vbuyy=pbuc2_derefidx_vbuyy
lda points+OFFSET_STRUCT_POINT_Y,y
sta SCREEN+OFFSET_STRUCT_POINT_Y,y
//SEG29 [15] (byte) main::i1#1 ← ++ (byte) main::i1#2 -- vbuxx=_inc_vbuxx
inx
//SEG30 [16] if((byte) main::i1#1!=(byte) 2) goto main::@2 -- vbuxx_neq_vbuc1_then_la1
cpx #2
bne b2
//SEG31 main::@return
//SEG32 [17] return
rts
}
points: .fill 2*2, 0

27
src/test/ref/struct-ptr-9.sym Normal file
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(label) @1
(label) @begin
(label) @end
(const byte) OFFSET_STRUCT_POINT_Y OFFSET_STRUCT_POINT_Y = (byte) 1
(byte) Point::x
(byte) Point::y
(void()) main()
(byte~) main::$2 reg byte x 16.5
(byte~) main::$3 reg byte y 27.5
(label) main::@1
(label) main::@2
(label) main::@return
(struct Point*) main::SCREEN
(const struct Point*) main::SCREEN#0 SCREEN = (struct Point*) 1024
(byte) main::i
(byte) main::i#1 reg byte y 16.5
(byte) main::i#2 reg byte y 11.0
(byte) main::i1
(byte) main::i1#1 reg byte x 16.5
(byte) main::i1#2 reg byte x 8.25
(struct Point[2]) points
(const struct Point[2]) points#0 points = { fill( 2, 0) }
reg byte y [ main::i#2 main::i#1 ]
reg byte x [ main::i1#2 main::i1#1 ]
reg byte x [ main::$2 ]
reg byte y [ main::$3 ]