Commit `7a85ad151d`

mlugg <mlugg@mlugg.co.uk>

2023-08-19 03:35:00

cbe: elide block result allocation for 0-bit types

This logic already existed for the void type, but is also necessary for other 0-bit types. Without it, we try to alloc a local for a 0-bit type which gets translated to a local of type `void` which C doesn't like.

master

1 parent 51f6438

Changed files (1)

src

codegen

c.zig

@@ -4285,7 +4285,7 @@ fn airBlock(f: *Function, inst: Air.Inst.Index) !CValue {
     const writer = f.object.writer();
 
     const inst_ty = f.typeOfIndex(inst);
-    const result = if (inst_ty.ip_index != .void_type and !f.liveness.isUnused(inst))
+    const result = if (inst_ty.hasRuntimeBitsIgnoreComptime(mod) and !f.liveness.isUnused(inst))
         try f.allocLocal(inst, inst_ty)
     else
         .none;

Commit 7a85ad151d

Commit `7a85ad151d`