forked from AbleOS/holey-bytes
slightly optimizing assignment
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parent
3127d04e41
commit
2dff9f7244
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@ -25,12 +25,12 @@ fn align_up(value: u64, align: u64) -> u64 {
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}
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#[derive(Debug, PartialEq, Eq)]
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struct LinReg(Reg, Rc<RefCell<RegAlloc>>);
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struct LinReg(Reg, Option<Rc<RefCell<RegAlloc>>>);
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#[cfg(debug_assertions)]
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impl Drop for LinReg {
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fn drop(&mut self) {
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self.1.borrow_mut().free(self.0);
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self.1.take().map(|b| b.borrow_mut().free(self.0));
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}
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}
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@ -677,7 +677,7 @@ impl<'a> Codegen<'a> {
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}
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fn alloc_reg(&mut self) -> LinReg {
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LinReg(self.gpa.borrow_mut().allocate(), self.gpa.clone()).into()
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LinReg(self.gpa.borrow_mut().allocate(), Some(self.gpa.clone())).into()
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}
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fn alloc_stack(&mut self, size: u64) -> Rc<Stack> {
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@ -1230,7 +1230,15 @@ impl<'a> Codegen<'a> {
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}
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let lsize = self.size_of(left.ty);
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let lhs = self.loc_to_reg(left.loc, lsize);
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let ty = ctx.ty().unwrap_or(left.ty);
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let lhs = match std::mem::take(&mut ctx).loc() {
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Some(Loc::RegRef(reg)) if Loc::RegRef(reg) == left.loc => LinReg(reg, None),
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Some(loc) => {
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ctx = Ctx::Dest(Value { ty, loc });
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self.loc_to_reg(left.loc, lsize)
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}
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None => self.loc_to_reg(left.loc, lsize),
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};
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let right = self.expr_ctx(right, Ctx::Inferred(left.ty))?;
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let rsize = self.size_of(right.ty);
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let rhs = self.loc_to_reg(right.loc, rsize);
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@ -1,3 +1,3 @@
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code size: 678
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code size: 666
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ret: 0
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status: Ok(())
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@ -1,3 +1,3 @@
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code size: 320
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ret: 33
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code size: 314
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ret: 44
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status: Ok(())
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@ -1,3 +1,3 @@
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code size: 293
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ret: 55
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code size: 287
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ret: 16
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status: Ok(())
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@ -1,3 +1,3 @@
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code size: 296
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code size: 290
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ret: 55
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status: Ok(())
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@ -1,3 +1,3 @@
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code size: 130
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code size: 124
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ret: 0
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status: Ok(())
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