Added tests for duplicate assignment right side optimization.

src/main/java/dk/camelot64/kickc/passes/Pass2DuplicateRValueIdentification.java

@@ -109,6 +109,19 @@ public class Pass2DuplicateRValueIdentification extends Pass2SsaOptimization {
       private boolean isTrivial() {
          if(operator == null) return true;
          if(operator instanceof OperatorCast) return true;
+         if(operator.equals(Operators.PLUS)) return true;
+         if(operator.equals(Operators.MINUS)) return true;
+         if(operator.equals(Operators.BOOL_AND)) return true;
+         if(operator.equals(Operators.BOOL_OR)) return true;
+         if(operator.equals(Operators.BOOL_XOR)) return true;
+         if(operator.equals(Operators.BOOL_NOT)) return true;
+         if(operator.equals(Operators.LE)) return true;
+         if(operator.equals(Operators.LT)) return true;
+         if(operator.equals(Operators.GE)) return true;
+         if(operator.equals(Operators.GT)) return true;
+         if(operator.equals(Operators.EQ)) return true;
+         if(operator.equals(Operators.NEQ)) return true;
+         if(operator.equals(Operators.LOGIC_NOT)) return true;
          return false;
       }
 

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

@@ -63,6 +63,11 @@ public class TestPrograms {
 
     */
 
+   @Test
+   public void testSubExprOptimize1() throws IOException, URISyntaxException {
+      compileAndCompare("subexpr-optimize-1");
+   }
+
    @Test
    public void testSubExprOptimize0() throws IOException, URISyntaxException {
       compileAndCompare("subexpr-optimize-0");

src/test/kc/subexpr-optimize-0.kc

@@ -3,8 +3,8 @@
 void main() {
     byte* screen = 0x400;
     for( byte i: 0..2) {
-        *screen++ = i+1;
-        *screen++ = i+1;
+        *screen++ = i*2;
+        *screen++ = i*2;
     }
 }
 

src/test/kc/subexpr-optimize-1.kc

@@ -0,0 +1,12 @@
+// A sub-expression that should not be optimized (+1 to a pointer)
+
+void main() {
+    byte* SCREEN = 0x0400;
+    for(byte i: 0..38) {
+        SCREEN[i] = SCREEN[i+1];
+        (SCREEN+40)[i] = (SCREEN+40)[i+1];
+        (SCREEN+80)[i] = (SCREEN+80)[i+1];
+        (SCREEN+120)[i] = (SCREEN+120)[i+1];
+    }
+
+}

src/test/ref/complex/tetris/tetris.asm

@@ -1412,22 +1412,19 @@ render_init: {
     sta li_1
     lda #>PLAYFIELD_SCREEN_1+2*$28+$10
     sta li_1+1
-    ldx #0
+    ldy #0
   b1:
-    txa
+    tya
     asl
-    tay
+    tax
     lda li_1
-    sta screen_lines_1,y
+    sta screen_lines_1,x
     lda li_1+1
-    sta screen_lines_1+1,y
-    txa
-    asl
-    tay
+    sta screen_lines_1+1,x
     lda li_2
-    sta screen_lines_2,y
+    sta screen_lines_2,x
     lda li_2+1
-    sta screen_lines_2+1,y
+    sta screen_lines_2+1,x
     lda #$28
     clc
     adc li_1
@@ -1442,8 +1439,8 @@ render_init: {
     bcc !+
     inc li_2+1
   !:
-    inx
-    cpx #PLAYFIELD_LINES-1+1
+    iny
+    cpy #PLAYFIELD_LINES-1+1
     bne b1
     rts
 }

src/test/ref/examples/3d/perspective.asm

@@ -244,42 +244,35 @@ mulf_init: {
     sta add
     lda #0
     sta add+1
-    tax
+    tay
     sta sqr
     sta sqr+1
   b1:
     lda sqr+1
     sta val
+    sta mulf_sqr1,y
+    sta mulf_sqr1+$100,y
+    tya
+    eor #$ff
+    tax
+    inx
+    lda val
     sta mulf_sqr1,x
     sta mulf_sqr1+$100,x
-    txa
+    sta mulf_sqr2+1,y
+    sta mulf_sqr2+$100+1,y
+    tya
     eor #$ff
-    tay
-    iny
+    tax
+    axs #1+1
     lda val
-    sta mulf_sqr1,y
-    txa
+    sta mulf_sqr2,x
+    tya
     eor #$ff
-    tay
-    iny
+    tax
+    axs #1+1
     lda val
-    sta mulf_sqr1+$100,y
-    sta mulf_sqr2+1,x
-    sta mulf_sqr2+$100+1,x
-    txa
-    eor #$ff
-    clc
-    adc #1+1
-    tay
-    lda val
-    sta mulf_sqr2,y
-    txa
-    eor #$ff
-    clc
-    adc #1+1
-    tay
-    lda val
-    sta mulf_sqr2+$100,y
+    sta mulf_sqr2+$100,x
     lda sqr
     clc
     adc add
@@ -294,8 +287,8 @@ mulf_init: {
     bcc !+
     inc add+1
   !:
-    inx
-    cpx #$81
+    iny
+    cpy #$81
     bne b1
     rts
 }

src/test/ref/examples/multiplexer/simple-multiplexer.asm

@@ -120,17 +120,13 @@ plexShowSprite: {
     ldx plex_sprite_idx
     sta PLEX_SCREEN_PTR,x
     ldy plex_show_idx
-    ldx PLEX_SORTED_IDX,y
-    txa
+    lda PLEX_SORTED_IDX,y
     asl
-    tay
-    lda PLEX_XPOS,y
+    tax
+    lda PLEX_XPOS,x
     ldy plex_sprite_idx2
     sta SPRITES_XPOS,y
-    txa
-    asl
-    tay
-    lda PLEX_XPOS+1,y
+    lda PLEX_XPOS+1,x
     cmp #0
     bne b1
     lda #$ff

src/test/ref/line-anim.asm

@@ -127,17 +127,14 @@ point_init: {
     .label x_diff = 9
     lda point_idx
     asl
-    tay
-    lda x_end,y
+    tax
+    lda x_end,x
     sta _0
-    lda x_end+1,y
+    lda x_end+1,x
     sta _0+1
-    lda point_idx
-    asl
-    tay
-    lda x_start,y
+    lda x_start,x
     sta _1
-    lda x_start+1,y
+    lda x_start+1,x
     sta _1+1
     lda x_diff
     sec
@@ -191,10 +188,10 @@ point_init: {
   b2:
     lda point_idx
     asl
-    tay
-    lda x_start,y
+    tax
+    lda x_start,x
     sta _9
-    lda x_start+1,y
+    lda x_start+1,x
     sta _9+1
     asl _9
     rol _9+1
@@ -204,13 +201,10 @@ point_init: {
     rol _9+1
     asl _9
     rol _9+1
-    lda point_idx
-    asl
-    tay
     lda _9
-    sta x_cur,y
+    sta x_cur,x
     lda _9+1
-    sta x_cur+1,y
+    sta x_cur+1,x
     ldy point_idx
     lda y_start,y
     sta _10
@@ -224,15 +218,11 @@ point_init: {
     rol _11+1
     asl _11
     rol _11+1
-    tya
-    asl
-    tay
     lda _11
-    sta y_cur,y
+    sta y_cur,x
     lda _11+1
-    sta y_cur+1,y
+    sta y_cur+1,x
     lda #DELAY
-    ldy point_idx
     sta delay,y
     rts
   b1:

src/test/ref/multiplexer-irq/simple-multiplexer-irq.asm

@@ -290,17 +290,13 @@ plexShowSprite: {
     ldx plex_sprite_idx
     sta PLEX_SCREEN_PTR,x
     ldy plex_show_idx
-    ldx PLEX_SORTED_IDX,y
-    txa
+    lda PLEX_SORTED_IDX,y
     asl
-    tay
-    lda PLEX_XPOS,y
+    tax
+    lda PLEX_XPOS,x
     ldy plex_sprite_idx2
     sta SPRITES_XPOS,y
-    txa
-    asl
-    tay
-    lda PLEX_XPOS+1,y
+    lda PLEX_XPOS+1,x
     cmp #0
     bne b1
     lda #$ff

src/test/ref/roll-sprite-msb.asm

@@ -37,9 +37,6 @@ position_sprite: {
     tay
     lda #y
     sta SPRITES_YPOS,y
-    lda spriteno
-    asl
-    tay
     lda x
     sta SPRITES_XPOS,y
     lda x+1

src/test/ref/subexpr-optimize-0.asm

@@ -4,6 +4,7 @@
 :BasicUpstart(main)
 .pc = $80d "Program"
 main: {
+    .label _1 = 4
     .label screen = 2
     lda #<$400
     sta screen
@@ -12,19 +13,15 @@ main: {
     ldx #0
   b1:
     txa
-    tay
-    iny
-    tya
+    asl
+    sta _1
     ldy #0
     sta (screen),y
     inc screen
     bne !+
     inc screen+1
   !:
-    txa
-    tay
-    iny
-    tya
+    lda _1
     ldy #0
     sta (screen),y
     inc screen

src/test/ref/subexpr-optimize-1.asm

@@ -0,0 +1,21 @@
+// A sub-expression that should not be optimized (+1 to a pointer)
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+main: {
+    .label SCREEN = $400
+    ldx #0
+  b1:
+    lda SCREEN+1,x
+    sta SCREEN,x
+    lda SCREEN+$28+1,x
+    sta SCREEN+$28,x
+    lda SCREEN+$50+1,x
+    sta SCREEN+$50,x
+    lda SCREEN+$78+1,x
+    sta SCREEN+$78,x
+    inx
+    cpx #$27
+    bne b1
+    rts
+}

src/test/ref/test-division.asm

@@ -24,17 +24,14 @@ test_16s: {
   b1:
     lda i
     asl
-    tay
-    lda dividends,y
+    tax
+    lda dividends,x
     sta dividend
-    lda dividends+1,y
+    lda dividends+1,x
     sta dividend+1
-    lda i
-    asl
-    tay
-    lda divisors,y
+    lda divisors,x
     sta divisor
-    lda divisors+1,y
+    lda divisors+1,x
     sta divisor+1
     jsr div16s
     lda print_line_cursor
@@ -76,9 +73,7 @@ test_16s: {
     inc i
     lda #6
     cmp i
-    beq !b1+
-    jmp b1
-  !b1:
+    bne b1
     rts
     dividends: .word $7fff, $7fff, -$7fff, -$7fff, $7fff, -$7fff
     divisors: .word 5, -7, $b, -$d, -$11, $13
@@ -539,17 +534,14 @@ test_16u: {
   b1:
     lda i
     asl
-    tay
-    lda dividends,y
+    tax
+    lda dividends,x
     sta dividend
-    lda dividends+1,y
+    lda dividends+1,x
     sta dividend+1
-    lda i
-    asl
-    tay
-    lda divisors,y
+    lda divisors,x
     sta divisor
-    lda divisors+1,y
+    lda divisors+1,x
     sta divisor+1
     jsr div16u
     lda print_line_cursor