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Consistently cast string length to usize

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This commit is contained in:
Richard Feldman 2020-09-12 21:57:11 -04:00
parent e3d0145894
commit d1b1fd3a6a
1 changed files with 4 additions and 4 deletions
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8
compiler/gen/src/llvm/build_str.rs
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@ -203,6 +203,7 @@ pub fn str_concat<'a, 'ctx, 'env>(
) )
} }
/// Obtain the string's length, cast from i8 to usize
fn str_len_from_final_byte<'a, 'ctx, 'env>( fn str_len_from_final_byte<'a, 'ctx, 'env>(
env: &Env<'a, 'ctx, 'env>, env: &Env<'a, 'ctx, 'env>,
final_byte: IntValue<'ctx>, final_byte: IntValue<'ctx>,
@ -210,8 +211,9 @@ fn str_len_from_final_byte<'a, 'ctx, 'env>(
let builder = env.builder; let builder = env.builder;
let ctx = env.context; let ctx = env.context;
let bitmask = ctx.i8_type().const_int(0b0111_1111, false); let bitmask = ctx.i8_type().const_int(0b0111_1111, false);
let len_i8 = builder.build_and(final_byte, bitmask, "small_str_length");
builder.build_and(final_byte, bitmask, "small_str_length") builder.build_int_cast(len_i8, env.ptr_int(), "len_as_usize")
} }
/// Used by LowLevel::StrIsEmpty /// Used by LowLevel::StrIsEmpty
@ -257,11 +259,9 @@ where
let builder = env.builder; let builder = env.builder;
let if_small = |final_byte| { let if_small = |final_byte| {
let len = str_len_from_final_byte(env, final_byte);
cb( cb(
cast_str_wrapper_to_array(env, wrapper_ptr), cast_str_wrapper_to_array(env, wrapper_ptr),
builder.build_int_cast(len, env.ptr_int(), "len_as_usize"), str_len_from_final_byte(env, final_byte),
Smallness::Small, Smallness::Small,
) )
}; };