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Remove dead broken code from const zst handling in backends

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This commit is contained in:
Oli Scherer 2022-09-06 14:09:49 +00:00
parent a594044533
commit 9c4fb018ca
4 changed files with 1 additions and 17 deletions
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4
compiler/rustc_codegen_gcc/src/common.rs
View file

@ -158,10 +158,6 @@ fn const_to_opt_u128(&self, _v: RValue<'gcc>, _sign_ext: bool) -> Option<u128> {
None
}
fn zst_to_backend(&self, _ty: Type<'gcc>) -> RValue<'gcc> {
self.const_undef(self.type_ix(0))
}
fn scalar_to_backend(&self, cv: Scalar, layout: abi::Scalar, ty: Type<'gcc>) -> RValue<'gcc> {
let bitsize = if layout.is_bool() { 1 } else { layout.size(self).bits() };
match cv {

4
compiler/rustc_codegen_llvm/src/common.rs
View file

@ -226,10 +226,6 @@ fn const_to_opt_u128(&self, v: &'ll Value, sign_ext: bool) -> Option<u128> {
})
}
fn zst_to_backend(&self, _llty: &'ll Type) -> &'ll Value {
self.const_undef(self.type_ix(0))
}
fn scalar_to_backend(&self, cv: Scalar, layout: abi::Scalar, llty: &'ll Type) -> &'ll Value {
let bitsize = if layout.is_bool() { 1 } else { layout.size(self).bits() };
match cv {

9
compiler/rustc_codegen_ssa/src/mir/operand.rs
View file

@ -72,10 +72,6 @@ pub fn from_const<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
) -> Self {
let layout = bx.layout_of(ty);
if layout.is_zst() {
return OperandRef::new_zst(bx, layout);
}
let val = match val {
ConstValue::Scalar(x) => {
let Abi::Scalar(scalar) = layout.abi else {
@ -84,10 +80,7 @@ pub fn from_const<Bx: BuilderMethods<'a, 'tcx, Value = V>>(
let llval = bx.scalar_to_backend(x, scalar, bx.immediate_backend_type(layout));
OperandValue::Immediate(llval)
}
ConstValue::ZeroSized => {
let llval = bx.zst_to_backend(bx.immediate_backend_type(layout));
OperandValue::Immediate(llval)
}
ConstValue::ZeroSized => return OperandRef::new_zst(bx, layout),
ConstValue::Slice { data, start, end } => {
let Abi::ScalarPair(a_scalar, _) = layout.abi else {
bug!("from_const: invalid ScalarPair layout: {:#?}", layout);

1
compiler/rustc_codegen_ssa/src/traits/consts.rs
View file

@ -29,7 +29,6 @@ pub trait ConstMethods<'tcx>: BackendTypes {
fn const_data_from_alloc(&self, alloc: ConstAllocation<'tcx>) -> Self::Value;
fn scalar_to_backend(&self, cv: Scalar, layout: abi::Scalar, llty: Self::Type) -> Self::Value;
fn zst_to_backend(&self, llty: Self::Type) -> Self::Value;
fn from_const_alloc(
&self,
layout: TyAndLayout<'tcx>,