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Special case ZST's in Rvalue::Repeat

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Fixes #1146 by preventing a hang for [(); usize::MAX], which is used in
a test of libcore.
This commit is contained in:
bjorn3 2021-03-15 10:22:21 +01:00
parent 6b58ed225e
commit 578fcdef5f
1 changed files with 3 additions and 1 deletions
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4
src/base.rs
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@ -660,7 +660,9 @@ fn codegen_stmt<'tcx>(
.val
.try_to_bits(fx.tcx.data_layout.pointer_size)
.unwrap();
if fx.clif_type(operand.layout().ty) == Some(types::I8) {
if operand.layout().size.bytes() == 0 {
// Do nothing for ZST's
} else if fx.clif_type(operand.layout().ty) == Some(types::I8) {
let times = fx.bcx.ins().iconst(fx.pointer_type, times as i64);
// FIXME use emit_small_memset where possible
let addr = lval.to_ptr().get_addr(fx);