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wasm: aggregate_init store sentinel for arrays

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Luuk de Gram 2023-05-27 15:14:18 +02:00
parent 969f921162
commit 128814f9bf
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GPG Key ID: A8CFE58E4DC7D664
1 changed files with 10 additions and 1 deletions
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11
src/arch/wasm/CodeGen.zig
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@ -4926,6 +4926,9 @@ fn airAggregateInit(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
const result = try func.allocStack(result_ty);
const elem_ty = result_ty.childType();
const elem_size = @intCast(u32, elem_ty.abiSize(func.target));
const sentinel = if (result_ty.sentinel()) |sent| blk: {
break :blk try func.lowerConstant(sent, elem_ty);
} else null;
// When the element type is by reference, we must copy the entire
// value. It is therefore safer to move the offset pointer and store
@ -4938,10 +4941,13 @@ fn airAggregateInit(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
const elem_val = try func.resolveInst(elem);
try func.store(offset, elem_val, elem_ty, 0);
if (elem_index < elements.len - 1) {
if (elem_index < elements.len - 1 and sentinel == null) {
_ = try func.buildPointerOffset(offset, elem_size, .modify);
}
}
if (sentinel) |sent| {
try func.store(offset, sent, elem_ty, 0);
}
} else {
var offset: u32 = 0;
for (elements) |elem| {
@ -4949,6 +4955,9 @@ fn airAggregateInit(func: *CodeGen, inst: Air.Inst.Index) InnerError!void {
try func.store(result, elem_val, elem_ty, offset);
offset += elem_size;
}
if (sentinel) |sent| {
try func.store(result, sent, elem_ty, offset);
}
}
break :result_value result;
},