From 40b5bb71618825dbdba512b43ebf8c4cb5caf153 Mon Sep 17 00:00:00 2001 From: Jacob Young Date: Sat, 8 Oct 2022 12:37:05 -0400 Subject: cbe: fix loads and stores of 0-bit types --- src/codegen/c.zig | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'src/codegen/c.zig') diff --git a/src/codegen/c.zig b/src/codegen/c.zig index 39ed7cf477..f00bd28773 100644 --- a/src/codegen/c.zig +++ b/src/codegen/c.zig @@ -2409,10 +2409,11 @@ fn airLoad(f: *Function, inst: Air.Inst.Index) !CValue { const ty_op = f.air.instructions.items(.data)[inst].ty_op; const is_volatile = f.air.typeOf(ty_op.operand).isVolatilePtr(); - if (!is_volatile and f.liveness.isUnused(inst)) + const inst_ty = f.air.typeOfIndex(inst); + if (!inst_ty.hasRuntimeBitsIgnoreComptime() or + !is_volatile and f.liveness.isUnused(inst)) return CValue.none; - const inst_ty = f.air.typeOfIndex(inst); const is_array = inst_ty.zigTypeTag() == .Array; const operand = try f.resolveInst(ty_op.operand); const writer = f.object.writer(); @@ -2565,9 +2566,11 @@ fn airStoreUndefined(f: *Function, dest_ptr: CValue) !CValue { fn airStore(f: *Function, inst: Air.Inst.Index) !CValue { // *a = b; const bin_op = f.air.instructions.items(.data)[inst].bin_op; + const lhs_child_type = f.air.typeOf(bin_op.lhs).childType(); + if (!lhs_child_type.hasRuntimeBitsIgnoreComptime()) return CValue.none; + const dest_ptr = try f.resolveInst(bin_op.lhs); const src_val = try f.resolveInst(bin_op.rhs); - const lhs_child_type = f.air.typeOf(bin_op.lhs).childType(); // TODO Sema should emit a different instruction when the store should // possibly do the safety 0xaa bytes for undefined. -- cgit v1.2.3