rust_compiler/libs/compiler/src/v1.rs

@@ -67,6 +67,9 @@ pub enum Error<'a> {
     #[error("Expected a {0}-tuple, but you're trying to destructure into {1} variables")]
     TupleSizeMismatch(usize, usize, Span),
 
+    #[error("{0}")]
+    OperationNotSupported(String, Span),
+
     #[error("{0}")]
     Unknown(String, Option<Span>),
 }
@@ -89,7 +92,8 @@ impl<'a> From<Error<'a>> for lsp_types::Diagnostic {
             | ConstAssignment(_, span)
             | DeviceAssignment(_, span)
             | AgrumentMismatch(_, span)
-            | TupleSizeMismatch(_, _, span) => Diagnostic {
+            | TupleSizeMismatch(_, _, span)
+            | OperationNotSupported(_, span) => Diagnostic {
                 range: span.into(),
                 message: value.to_string(),
                 severity: Some(DiagnosticSeverity::ERROR),
@@ -497,9 +501,9 @@ impl<'a> Compiler<'a> {
                 // Check if device is "db" (not allowed)
                 if let Operand::Device(ref dev_str) = device {
                     if dev_str.as_ref() == "db" {
-                        return Err(Error::Unknown(
+                        return Err(Error::OperationNotSupported(
                             "Direct stack access on 'db' is not yet supported".to_string(),
-                            Some(expr.span),
+                            expr.span,
                         ));
                     }
                 }
@@ -1152,9 +1156,9 @@ impl<'a> Compiler<'a> {
                 // Check if device is "db" (not allowed)
                 if let Operand::Device(ref dev_str) = device {
                     if dev_str.as_ref() == "db" {
-                        return Err(Error::Unknown(
+                        return Err(Error::OperationNotSupported(
                             "Direct stack access on 'db' is not yet supported".to_string(),
-                            Some(assignee.span),
+                            assignee.span,
                         ));
                     }
                 }
@@ -2355,7 +2359,22 @@ impl<'a> Compiler<'a> {
                 // 4. Handle Binary Ops: Recurse BOTH sides, then combine
                 Expression::Binary(bin) => fold_binary_expression(&bin.node),
 
-                // 5. Anything else (Variables, Function Calls) cannot be compile-time folded
+                // 5. Handle hash() macro - evaluates to a constant at compile time
+                Expression::Invocation(inv) => {
+                    if inv.node.name.node == "hash" && inv.node.arguments.len() == 1 {
+                        if let Expression::Literal(Spanned {
+                            node: Literal::String(str_to_hash),
+                            ..
+                        }) = &inv.node.arguments[0].node
+                        {
+                            // hash() takes a string literal and returns a signed integer
+                            return Some(Number::Integer(crc_hash_signed(str_to_hash), Unit::None));
+                        }
+                    }
+                    None
+                }
+
+                // 6. Anything else cannot be compile-time folded
                 _ => None,
             }
         }

rust_compiler/libs/integration_tests/src/device_indexing_tests.rs

@@ -0,0 +1,107 @@
+#[cfg(test)]
+mod device_indexing_tests {
+    use crate::common::compile_with_and_without_optimization;
+    use indoc::indoc;
+
+    #[test]
+    fn test_device_indexing_with_hash_and_binary_literals() {
+        let source = indoc! {"
+            device printer = \"d0\";
+            
+            let item_type = hash(\"ItemIronIngot\");
+            let quality = 16;
+            let quantity = 7;
+            
+            // Pack into a single value using bitwise operations
+            // Format: (itemHash << 16) | (quality << 8) | quantity
+            let packed = (item_type << 16) | (quality << 8) | quantity;
+            
+            // Write to device stack at address 255
+            let addr = 255;
+            printer[addr] = packed;
+            
+            // Read it back
+            let result = printer[addr];
+        "};
+        let output = compile_with_and_without_optimization(source);
+        insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_device_indexing_with_computed_index() {
+        let source = indoc! {"
+            device storage = \"d1\";
+            
+            let base_addr = 10;
+            let offset = 5;
+            let index = base_addr + offset;
+            
+            let value = 42;
+            storage[index] = value;
+            
+            let retrieved = storage[index];
+        "};
+        let output = compile_with_and_without_optimization(source);
+        insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_device_indexing_with_binary_literals() {
+        let source = indoc! {"
+            device mem = \"d0\";
+            
+            // Binary literals for bitwise operations
+            let flags = 0b1010_0101;
+            let mask = 0b1111_0000;
+            let masked = flags & mask;
+            
+            // Write to device
+            mem[0] = masked;
+            
+            // Read back
+            let read_value = mem[0];
+        "};
+        let output = compile_with_and_without_optimization(source);
+        insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_device_indexing_complex_expression() {
+        let source = indoc! {"
+            device db = \"d0\";
+            
+            let item = hash(\"ItemCopper\");
+            let quality = 5;
+            let quantity = 100;
+            
+            // Complex bitwise expression
+            let packed = (item << 16) | ((quality & 0xFF) << 8) | (quantity & 0xFF);
+            
+            // Index with computed address
+            let slot = 1;
+            let address = slot * 256 + 100;
+            db[address] = packed;
+            
+            // Read back with different computation
+            let read_addr = (slot + 0) * 256 + 100;
+            let stored_value = db[read_addr];
+        "};
+        let output = compile_with_and_without_optimization(source);
+        insta::assert_snapshot!(output);
+    }
+
+    #[test]
+    fn test_device_indexing_optimization_folds_constants() {
+        let source = indoc! {"
+            device cache = \"d0\";
+            
+            // This should optimize to a single constant
+            let packed_constant = (hash(\"ItemSilver\") << 16) | (10 << 8) | 50;
+            
+            cache[255] = packed_constant;
+            let result = cache[255];
+        "};
+        let output = compile_with_and_without_optimization(source);
+        insta::assert_snapshot!(output);
+    }
+}

rust_compiler/libs/integration_tests/src/lib.rs

@@ -8,6 +8,8 @@ mod bitwise_tests;
 #[cfg(test)]
 mod common;
 #[cfg(test)]
+mod device_indexing_tests;
+#[cfg(test)]
 mod function_tests;
 #[cfg(test)]
 mod number_literal_tests;

rust_compiler/libs/integration_tests/src/snapshots/integration_tests__bitwise_tests__bitwise_tests__bitwise_operations.snap

@@ -22,8 +22,11 @@ move r13 r4
 
 move r8 5
 move r9 3
-and r10 r8 r9
+move r1 1
-or r11 r8 r9
+move r10 1
-xor r12 r8 r9
+move r2 7
+move r11 7
+move r3 6
+move r12 6
 not r4 r8
 move r13 r4

rust_compiler/libs/integration_tests/src/snapshots/integration_tests__bitwise_tests__bitwise_tests__bitwise_shifts.snap

@@ -18,9 +18,9 @@ move r11 r3
 ## Optimized Output
 
 move r8 8
-sll r1 r8 2
+move r1 32
-move r9 r1
+move r9 32
-sra r2 r8 1
+move r2 4
-move r10 r2
+move r10 4
-srl r3 r8 1
+move r3 4
-move r11 r3
+move r11 4

rust_compiler/libs/integration_tests/src/snapshots/integration_tests__device_indexing_tests__device_indexing_tests__device_indexing_complex_expression.snap

@@ -0,0 +1,54 @@
+---
+source: libs/integration_tests/src/device_indexing_tests.rs
+assertion_line: 90
+expression: output
+---
+## Unoptimized Output
+
+j main
+main:
+move r8 r15
+move r9 5
+move r10 100
+sll r1 r8 16
+and r2 r9 255
+sll r3 r2 8
+or r4 r1 r3
+and r5 r10 255
+or r6 r4 r5
+move r11 r6
+move r12 1
+mul r7 r12 256
+add r2 r7 100
+move r13 r2
+put d0 r13 r11
+add r1 r12 0
+mul r3 r1 256
+add r4 r3 100
+move r14 r4
+get r5 d0 r14
+push r5
+sub sp sp 1
+
+## Optimized Output
+
+move r8 r15
+move r9 5
+move r10 100
+sll r1 r8 16
+move r3 1280
+or r4 r1 r3
+move r5 100
+or r11 r4 r5
+move r12 1
+move r7 256
+move r2 356
+move r13 356
+put d0 r13 r11
+move r1 1
+move r3 256
+move r4 356
+move r14 356
+get r5 d0 r14
+push r5
+sub sp sp 1

rust_compiler/libs/integration_tests/src/snapshots/integration_tests__device_indexing_tests__device_indexing_tests__device_indexing_optimization_folds_constants.snap

@@ -0,0 +1,25 @@
+---
+source: libs/integration_tests/src/device_indexing_tests.rs
+assertion_line: 105
+expression: output
+---
+## Unoptimized Output
+
+j main
+main:
+sll r1 -952768015 16
+or r2 r1 2560
+or r3 r2 50
+move r8 r3
+put d0 255 r8
+get r4 d0 255
+move r9 r4
+
+## Optimized Output
+
+move r1 -62440604631040
+move r2 -62440604628480
+move r3 -62440604628430
+move r8 -62440604628430
+put d0 255 r8
+get r9 d0 255

rust_compiler/libs/integration_tests/src/snapshots/integration_tests__device_indexing_tests__device_indexing_tests__device_indexing_with_binary_literals.snap

@@ -0,0 +1,25 @@
+---
+source: libs/integration_tests/src/device_indexing_tests.rs
+assertion_line: 65
+expression: output
+---
+## Unoptimized Output
+
+j main
+main:
+move r8 165
+move r9 240
+and r1 r8 r9
+move r10 r1
+put d0 0 r10
+get r2 d0 0
+move r11 r2
+
+## Optimized Output
+
+move r8 165
+move r9 240
+move r1 160
+move r10 160
+put d0 0 r10
+get r11 d0 0

rust_compiler/libs/integration_tests/src/snapshots/integration_tests__device_indexing_tests__device_indexing_tests__device_indexing_with_computed_index.snap

@@ -0,0 +1,27 @@
+---
+source: libs/integration_tests/src/device_indexing_tests.rs
+assertion_line: 45
+expression: output
+---
+## Unoptimized Output
+
+j main
+main:
+move r8 10
+move r9 5
+add r1 r8 r9
+move r10 r1
+move r11 42
+put d1 r10 r11
+get r2 d1 r10
+move r12 r2
+
+## Optimized Output
+
+move r8 10
+move r9 5
+move r1 15
+move r10 15
+move r11 42
+put d1 r10 r11
+get r12 d1 r10

rust_compiler/libs/integration_tests/src/snapshots/integration_tests__device_indexing_tests__device_indexing_tests__device_indexing_with_hash_and_binary_literals.snap

@@ -0,0 +1,34 @@
+---
+source: libs/integration_tests/src/device_indexing_tests.rs
+assertion_line: 27
+expression: output
+---
+## Unoptimized Output
+
+j main
+main:
+move r8 r15
+move r9 16
+move r10 7
+sll r1 r8 16
+sll r2 r9 8
+or r3 r1 r2
+or r4 r3 r10
+move r11 r4
+move r12 255
+put d0 r12 r11
+get r5 d0 r12
+move r13 r5
+
+## Optimized Output
+
+move r8 r15
+move r9 16
+move r10 7
+sll r1 r8 16
+move r2 4096
+or r3 r1 r2
+or r11 r3 r10
+move r12 255
+put d0 r12 r11
+get r13 d0 r12

rust_compiler/libs/optimizer/src/constant_propagation.rs

@@ -31,6 +31,26 @@ pub fn constant_propagation<'a>(
             Instruction::Mod(dst, a, b) => try_fold_math(dst, a, b, &registers, |x, y| {
                 if y.is_zero() { Decimal::ZERO } else { x % y }
             }),
+            Instruction::And(dst, a, b) => try_fold_bitwise(dst, a, b, &registers, |x, y| x & y),
+            Instruction::Or(dst, a, b) => try_fold_bitwise(dst, a, b, &registers, |x, y| x | y),
+            Instruction::Xor(dst, a, b) => try_fold_bitwise(dst, a, b, &registers, |x, y| x ^ y),
+            Instruction::Sll(dst, a, b) => try_fold_bitwise(dst, a, b, &registers, |x, y| {
+                if y >= 64 { 0 } else { x << y as u32 }
+            }),
+            Instruction::Sra(dst, a, b) => try_fold_bitwise(dst, a, b, &registers, |x, y| {
+                if y >= 64 {
+                    (if x < 0 { -1 } else { 0 })
+                } else {
+                    x >> y as u32
+                }
+            }),
+            Instruction::Srl(dst, a, b) => try_fold_bitwise(dst, a, b, &registers, |x, y| {
+                if y >= 64 {
+                    0
+                } else {
+                    (x as u64 >> y as u32) as i64
+                }
+            }),
             Instruction::BranchEq(a, b, l) => {
                 try_resolve_branch(a, b, l, &registers, |x, y| x == y)
             }
@@ -110,6 +130,43 @@ where
     ))
 }
 
+fn decimal_to_i64(d: Decimal) -> i64 {
+    // Convert decimal to i64, truncating if needed
+    if let Ok(int_val) = d.try_into() {
+        int_val
+    } else {
+        // For very large or very small values, use a default
+        if d.is_sign_negative() {
+            i64::MIN
+        } else {
+            i64::MAX
+        }
+    }
+}
+
+fn i64_to_decimal(i: i64) -> Decimal {
+    Decimal::from(i)
+}
+
+fn try_fold_bitwise<'a, F>(
+    dst: &Operand<'a>,
+    a: &Operand<'a>,
+    b: &Operand<'a>,
+    regs: &[Option<Decimal>; 16],
+    op: F,
+) -> Option<Instruction<'a>>
+where
+    F: Fn(i64, i64) -> i64,
+{
+    let val_a = resolve_value(a, regs)?;
+    let val_b = resolve_value(b, regs)?;
+    let result = op(decimal_to_i64(val_a), decimal_to_i64(val_b));
+    Some(Instruction::Move(
+        dst.clone(),
+        Operand::Number(i64_to_decimal(result)),
+    ))
+}
+
 fn try_resolve_branch<'a, F>(
     a: &Operand<'a>,
     b: &Operand<'a>,