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Sema: do not emit pointer safety checks for pointers to zero-bit types

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This commit is contained in:
Veikka Tuominen
2022-08-06 15:22:14 +03:00
parent 0daa77bd63
commit 75275a1514
1 changed files with 7 additions and 3 deletions
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10
src/Sema.zig
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@@ -16877,7 +16877,7 @@ fn zirIntToPtr(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Ai
}
try sema.requireRuntimeBlock(block, src, operand_src);
if (block.wantSafety()) {
if (block.wantSafety() and try sema.typeHasRuntimeBits(block, sema.src, type_res.elemType2())) {
if (!type_res.isAllowzeroPtr()) {
const is_non_zero = try block.addBinOp(.cmp_neq, operand_coerced, .zero_usize);
try sema.addSafetyCheck(block, is_non_zero, .cast_to_null);
@@ -17169,7 +17169,9 @@ fn zirAlignCast(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!A
}
try sema.requireRuntimeBlock(block, inst_data.src(), ptr_src);
if (block.wantSafety() and dest_align > 1) {
if (block.wantSafety() and dest_align > 1 and
try sema.typeHasRuntimeBits(block, sema.src, dest_ty.elemType2()))
{
const val_payload = try sema.arena.create(Value.Payload.U64);
val_payload.* = .{
.base = .{ .tag = .int_u64 },
@@ -24489,7 +24491,9 @@ fn coerceCompatiblePtrs(
try sema.requireRuntimeBlock(block, inst_src, null);
const inst_ty = sema.typeOf(inst);
const inst_allows_zero = (inst_ty.zigTypeTag() == .Pointer and inst_ty.ptrAllowsZero()) or true;
if (block.wantSafety() and inst_allows_zero and !dest_ty.ptrAllowsZero()) {
if (block.wantSafety() and inst_allows_zero and !dest_ty.ptrAllowsZero() and
try sema.typeHasRuntimeBits(block, sema.src, dest_ty.elemType2()))
{
const actual_ptr = if (inst_ty.isSlice())
try sema.analyzeSlicePtr(block, inst_src, inst, inst_ty)
else