From 9060981c10c21834596d5677a2c9ccc56809eb64 Mon Sep 17 00:00:00 2001 From: Quentin Carbonneaux Date: Tue, 8 Mar 2022 15:49:01 +0100 Subject: flag types defined as unions The risc-v abi needs to know if a type is defined as a union or not. We cannot use nunion to obtain this information because the risc-v abi made the unfortunate decision of treating union { int i; } differently from int i; So, instead, I introduce a single bit flag 'isunion'. --- parse.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'parse.c') diff --git a/parse.c b/parse.c index c9638fd..70c291b 100644 --- a/parse.c +++ b/parse.c @@ -925,7 +925,8 @@ parsetyp() */ vgrow(&typ, ntyp+1); ty = &typ[ntyp++]; - ty->dark = 0; + ty->isdark = 0; + ty->isunion = 0; ty->align = -1; ty->size = 0; if (nextnl() != Ttyp || nextnl() != Teq) @@ -944,7 +945,7 @@ parsetyp() err("type body must start with {"); t = nextnl(); if (t == Tint) { - ty->dark = 1; + ty->isdark = 1; ty->size = tokval.num; if (ty->align == -1) err("dark types need alignment"); @@ -954,7 +955,8 @@ parsetyp() } n = 0; ty->fields = vnew(1, sizeof ty->fields[0], Pheap); - if (t == Tlbrace) + if (t == Tlbrace) { + ty->isunion = 1; do { if (t != Tlbrace) err("invalid union member"); @@ -962,7 +964,7 @@ parsetyp() parsefields(ty->fields[n++], ty, nextnl()); t = nextnl(); } while (t != Trbrace); - else + } else parsefields(ty->fields[n++], ty, t); ty->nunion = n; } -- cgit v1.2.3