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[core] codegen/expr: Implement string equality

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This commit is contained in:
David Mak 2024-08-21 16:23:48 +08:00
parent 908271014a
commit a8e92212c0
1 changed files with 110 additions and 1 deletions
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111
nac3core/src/codegen/expr.rs
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@ -9,7 +9,7 @@ use crate::{
irrt::*,
llvm_intrinsics::{
call_expect, call_float_floor, call_float_pow, call_float_powi, call_int_smax,
call_memcpy_generic,
call_int_umin, call_memcpy_generic,
},
need_sret, numpy,
stmt::{
@ -2024,6 +2024,115 @@ pub fn gen_cmpop_expr_with_values<'ctx, G: CodeGenerator>(
_ => unreachable!(),
};
ctx.builder.build_float_compare(op, lhs, rhs, "cmp").unwrap()
} else if left_ty == ctx.primitives.str {
assert!(ctx.unifier.unioned(left_ty, right_ty));
let llvm_i1 = ctx.ctx.bool_type();
let llvm_i32 = ctx.ctx.i32_type();
let llvm_usize = generator.get_size_type(ctx.ctx);
let lhs = lhs.into_struct_value();
let rhs = rhs.into_struct_value();
let plhs = generator.gen_var_alloc(ctx, lhs.get_type().into(), None).unwrap();
ctx.builder.build_store(plhs, lhs).unwrap();
let prhs = generator.gen_var_alloc(ctx, lhs.get_type().into(), None).unwrap();
ctx.builder.build_store(prhs, rhs).unwrap();
let lhs_len = ctx.build_in_bounds_gep_and_load(
plhs,
&[llvm_i32.const_zero(), llvm_i32.const_int(1, false)],
None,
).into_int_value();
let rhs_len = ctx.build_in_bounds_gep_and_load(
prhs,
&[llvm_i32.const_zero(), llvm_i32.const_int(1, false)],
None,
).into_int_value();
let len = call_int_umin(ctx, lhs_len, rhs_len, None);
let current_bb = ctx.builder.get_insert_block().unwrap();
let post_foreach_cmp = ctx.ctx.insert_basic_block_after(current_bb, "foreach.cmp.end");
ctx.builder.position_at_end(post_foreach_cmp);
let cmp_phi = ctx.builder.build_phi(llvm_i1, "").unwrap();
ctx.builder.position_at_end(current_bb);
gen_for_callback_incrementing(
generator,
ctx,
None,
llvm_usize.const_zero(),
(len, false),
|generator, ctx, _, i| {
let lhs_char = {
let plhs_data = ctx.build_in_bounds_gep_and_load(
plhs,
&[llvm_i32.const_zero(), llvm_i32.const_zero()],
None,
).into_pointer_value();
ctx.build_in_bounds_gep_and_load(
plhs_data,
&[i],
None
).into_int_value()
};
let rhs_char = {
let prhs_data = ctx.build_in_bounds_gep_and_load(
prhs,
&[llvm_i32.const_zero(), llvm_i32.const_zero()],
None,
).into_pointer_value();
ctx.build_in_bounds_gep_and_load(
prhs_data,
&[i],
None
).into_int_value()
};
gen_if_callback(
generator,
ctx,
|_, ctx| {
Ok(ctx.builder.build_int_compare(IntPredicate::NE, lhs_char, rhs_char, "").unwrap())
},
|_, ctx| {
let bb = ctx.builder.get_insert_block().unwrap();
cmp_phi.add_incoming(&[(&llvm_i1.const_zero(), bb)]);
ctx.builder.build_unconditional_branch(post_foreach_cmp).unwrap();
Ok(())
},
|_, _| Ok(()),
)?;
Ok(())
},
llvm_usize.const_int(1, false),
)?;
let bb = ctx.builder.get_insert_block().unwrap();
let is_len_eq = ctx.builder.build_int_compare(
IntPredicate::EQ,
lhs_len,
rhs_len,
"",
).unwrap();
cmp_phi.add_incoming(&[(&is_len_eq, bb)]);
ctx.builder.build_unconditional_branch(post_foreach_cmp).unwrap();
ctx.builder.position_at_end(post_foreach_cmp);
let cmp_phi = cmp_phi.as_basic_value().into_int_value();
// Invert the final value if __ne__
if *op == Cmpop::NotEq {
ctx.builder.build_not(cmp_phi, "").unwrap()
} else {
cmp_phi
}
} else if [left_ty, right_ty]
.iter()
.any(|ty| ty.obj_id(&ctx.unifier).is_some_and(|id| id == PrimDef::List.id()))