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cbe: incorrectly implement volatile memset

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This will have to be replaced with manual volatile stores.
This commit is contained in:
Jacob Young 2022-11-01 04:54:58 -04:00
parent 09763435a8
commit 4d594090b1
1 changed files with 11 additions and 0 deletions
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11
src/codegen/c.zig
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@ -4926,12 +4926,23 @@ fn airAtomicStore(f: *Function, inst: Air.Inst.Index, order: [*:0]const u8) !CVa
fn airMemset(f: *Function, inst: Air.Inst.Index) !CValue {
const pl_op = f.air.instructions.items(.data)[inst].pl_op;
const extra = f.air.extraData(Air.Bin, pl_op.payload).data;
const dest_ty = f.air.typeOf(pl_op.operand);
const dest_ptr = try f.resolveInst(pl_op.operand);
const value = try f.resolveInst(extra.lhs);
const len = try f.resolveInst(extra.rhs);
const writer = f.object.writer();
try writer.writeAll("memset(");
if (dest_ty.isVolatilePtr()) {
// This is wrong, but good enough for now.
var remove_volatile_pl = dest_ty.ptrInfo();
remove_volatile_pl.data.@"volatile" = false;
const remove_volatile_ty = Type.initPayload(&remove_volatile_pl.base);
try writer.writeByte('(');
try f.renderTypecast(writer, remove_volatile_ty);
try writer.writeByte(')');
}
try f.writeCValue(writer, dest_ptr, .FunctionArgument);
try writer.writeAll(", ");
try f.writeCValue(writer, value, .FunctionArgument);