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[cranelift-frontend] Fix emit_zero for vectors (#1428)

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* Fix emit_zero for vectors
* Add undef_vector_vars frontend test
* Remove unused import
This commit is contained in:
bjorn3
2020-03-30 22:01:14 +02:00
committed by GitHub
parent 968cd76163
commit bc462404b3
2 changed files with 55 additions and 4 deletions
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12
cranelift/frontend/src/ssa.rs
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@@ -9,6 +9,7 @@
use crate::Variable;
use alloc::vec::Vec;
use core::convert::TryInto;
use core::mem;
use cranelift_codegen::cursor::{Cursor, FuncCursor};
use cranelift_codegen::entity::SecondaryMap;
@@ -185,10 +186,13 @@ fn emit_zero(ty: Type, mut cur: FuncCursor) -> Value {
cur.ins().null(ty)
} else if ty.is_vector() {
let scalar_ty = ty.lane_type();
if scalar_ty.is_int() {
cur.ins().iconst(ty, 0)
} else if scalar_ty.is_bool() {
cur.ins().bconst(ty, false)
if scalar_ty.is_int() || scalar_ty.is_bool() {
let zero = cur.func.dfg.constants.insert(
core::iter::repeat(0)
.take(ty.bytes().try_into().unwrap())
.collect(),
);
cur.ins().vconst(ty, zero)
} else if scalar_ty == F32 {
let scalar = cur.ins().f32const(Ieee32::with_bits(0));
cur.ins().splat(ty, scalar)