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fixing @as misbehaving

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This commit is contained in:
Jakub Doka 2024-10-24 14:08:17 +02:00
parent e65dbcfcbe
commit 9c43dafcf5
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GPG key ID: C6E9A89936B8C143
4 changed files with 41 additions and 27 deletions
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8
lang/README.md
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@ -542,14 +542,12 @@ main := fn(): int {
#### small_struct_bitcast
```hb
Color := struct {r: u8, g: u8, b: u8, a: u8}
white := Color.(255, 255, 255, 255)
u32_to_color := fn(v: u32): Color {
return @bitcast(v)
}
u32_to_color := fn(v: u32): Color return @bitcast(v)
u32_to_u32 := fn(v: u32): u32 return v
main := fn(): int {
return u32_to_color(@bitcast(white)).r
return u32_to_color(@bitcast(white)).r + @as(Color, @bitcast(u32_to_u32(@bitcast(white)))).g
}
```

9
lang/src/son.rs
View file

@ -2539,7 +2539,8 @@ impl<'a> Codegen<'a> {
Expr::Directive { name: "as", args: [ty, expr], .. } => {
let ty = self.ty(ty);
let ctx = Ctx::default().with_ty(ty);
let mut val = self.expr_ctx(expr, ctx)?;
let mut val = self.raw_expr_ctx(expr, ctx)?;
self.strip_var(&mut val);
self.assert_ty(expr.pos(), &mut val, ty, "hinted expr");
Some(val)
}
@ -3538,6 +3539,9 @@ impl<'a> Codegen<'a> {
if let Some(oper) = to_correct {
oper.ty = upcasted;
if core::mem::take(&mut oper.ptr) {
oper.id = self.load_mem(oper.id, oper.ty);
}
oper.id = self.ci.nodes.new_node(upcasted, Kind::Extend, [VOID, oper.id]);
if matches!(op, TokenKind::Add | TokenKind::Sub)
&& let Some(elem) = self.tys.base_of(upcasted)
@ -3586,6 +3590,9 @@ impl<'a> Codegen<'a> {
self.ty_display(upcasted)
);
src.ty = upcasted;
if core::mem::take(&mut src.ptr) {
src.id = self.load_mem(src.id, src.ty);
}
src.id = self.ci.nodes.new_node(upcasted, Kind::Extend, [VOID, src.id]);
}
true

21
lang/tests/son_tests_returning_global_struct.txt
View file

@ -6,17 +6,16 @@ main:
ST r1, r254, 4a, 4h
ADDI64 r5, r254, 0d
BMC r32, r5, 4h
LD r4, r254, 3a, 1h
ANDI r6, r4, 255d
LD r3, r254, 2a, 1h
LD r3, r254, 3a, 1h
ANDI r5, r3, 255d
LD r2, r254, 1a, 1h
LD r2, r254, 2a, 1h
ANDI r4, r2, 255d
LD r2, r254, 0a, 1h
ANDI r7, r2, 255d
ADD64 r8, r4, r7
ADD64 r12, r8, r5
ADD64 r1, r12, r6
LD r1, r254, 1a, 1h
ANDI r3, r1, 255d
LD r2, r254, 0a, 8h
ADD64 r6, r2, r3
ADD64 r10, r6, r4
ADD64 r1, r10, r5
LD r31, r254, 8a, 16h
ADDI64 r254, r254, 24d
JALA r0, r31, 0a
@ -24,6 +23,6 @@ random_color:
LRA r1, r0, :white
LD r1, r1, 0a, 4h
JALA r0, r31, 0a
code size: 257
ret: 1020
code size: 246
ret: 764
status: Ok(())

30
lang/tests/son_tests_small_struct_bitcast.txt
View file

@ -1,15 +1,22 @@
main:
ADDI64 r254, r254, -12d
ST r31, r254, 4a, 8h
ADDI64 r254, r254, -24d
ST r31, r254, 8a, 16h
LRA r1, r0, :white
LD r2, r1, 0a, 4h
ADDI64 r5, r254, 0d
LD r32, r1, 0a, 4h
ADDI64 r5, r254, 4d
CP r2, r32
JAL r31, r0, :u32_to_color
ST r1, r254, 4a, 4h
CP r2, r32
JAL r31, r0, :u32_to_u32
ADDI64 r12, r254, 0d
LD r11, r254, 4a, 1h
ST r1, r254, 0a, 4h
LD r9, r254, 0a, 1h
ANDI r1, r9, 255d
LD r31, r254, 4a, 8h
ADDI64 r254, r254, 12d
LD r4, r254, 1a, 1h
ADD8 r7, r4, r11
ANDI r1, r7, 255d
LD r31, r254, 8a, 16h
ADDI64 r254, r254, 24d
JALA r0, r31, 0a
u32_to_color:
ADDI64 r254, r254, -4d
@ -18,6 +25,9 @@ u32_to_color:
LD r1, r3, 0a, 4h
ADDI64 r254, r254, 4d
JALA r0, r31, 0a
code size: 216
ret: 255
u32_to_u32:
CP r1, r2
JALA r0, r31, 0a
code size: 284
ret: 254
status: Ok(())