From: adr <adr@SDF.ORG>
To: 9fans <9fans@9fans.net>
Subject: Re: [9fans] Conversion of constants in C compiler
Date: Thu, 21 Apr 2022 07:54:56 +0000 (UTC) [thread overview]
Message-ID: <8530f0d7-7c38-92af-d649-23f99645b748@SDF.ORG> (raw)
In-Reply-To: <B84B8B8832E3883C4DB26DBBF3289C95@eigenstate.org>
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On Wed, 20 Apr 2022, ori@eigenstate.org wrote:
> When you have a patch, let me know -- I'll happily test
> and apply to 9front.
Hi ori, this patch applyes to the sources served at 9front.org.
By the way, do you plan to keep in sync
http://only9fans.com/ori/git9/HEAD/info.html or should I forget
about that repo?
Regards,
adr.
--- /n/9front/sys/src/cmd/cc/lex.c Wed Apr 6 14:45:26 2022
+++ /tmp/lex.c Thu Apr 21 08:39:14 2022
@@ -848,16 +848,9 @@
yyerror("overflow in constant");
vv = yylval.vval;
- /*
- * c99 is silly: decimal constants stay signed,
- * hex and octal go unsigned before widening.
- */
- w = 32;
- if((c1 & (Numdec|Numuns)) == Numdec)
- w = 31;
- if(c1 & Numvlong || (c1 & Numlong) == 0 && (uvlong)vv >= 1ULL<<w){
- if((c1&(Numdec|Numvlong)) == Numdec && vv < 1ULL<<32)
- warn(Z, "int constant widened to vlong: %s", symb);
+ if(c1 & Numvlong ||
+ convvtox(vv, TUVLONG) > convvtox(vv, TULONG) ||
+ (c1 & (Numdec|Numuns)) == Numdec && convvtox(vv, TLONG) < 0) {
if((c1 & Numuns) || convvtox(vv, TVLONG) < 0) {
c = LUVLCONST;
t = TUVLONG;
@@ -867,7 +860,9 @@
t = TVLONG;
goto nret;
}
- if(c1 & Numlong) {
+ if(c1 & Numlong ||
+ convvtox(vv, TULONG) > convvtox(vv, TUINT) ||
+ (c1 & (Numdec|Numuns)) == Numdec && convvtox(vv, TINT) < 0) {
if((c1 & Numuns) || convvtox(vv, TLONG) < 0) {
c = LULCONST;
t = TULONG;
------------------------------------------
9fans: 9fans
Permalink: https://9fans.topicbox.com/groups/9fans/T22754f10b241991c-Mefe97ddcd27aad8f1a072269
Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
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--- /n/9front/sys/src/cmd/cc/lex.c Wed Apr 6 14:45:26 2022
+++ /tmp/lex.c Thu Apr 21 08:39:14 2022
@@ -848,16 +848,9 @@
yyerror("overflow in constant");
vv = yylval.vval;
- /*
- * c99 is silly: decimal constants stay signed,
- * hex and octal go unsigned before widening.
- */
- w = 32;
- if((c1 & (Numdec|Numuns)) == Numdec)
- w = 31;
- if(c1 & Numvlong || (c1 & Numlong) == 0 && (uvlong)vv >= 1ULL<<w){
- if((c1&(Numdec|Numvlong)) == Numdec && vv < 1ULL<<32)
- warn(Z, "int constant widened to vlong: %s", symb);
+ if(c1 & Numvlong ||
+ convvtox(vv, TUVLONG) > convvtox(vv, TULONG) ||
+ (c1 & (Numdec|Numuns)) == Numdec && convvtox(vv, TLONG) < 0) {
if((c1 & Numuns) || convvtox(vv, TVLONG) < 0) {
c = LUVLCONST;
t = TUVLONG;
@@ -867,7 +860,9 @@
t = TVLONG;
goto nret;
}
- if(c1 & Numlong) {
+ if(c1 & Numlong ||
+ convvtox(vv, TULONG) > convvtox(vv, TUINT) ||
+ (c1 & (Numdec|Numuns)) == Numdec && convvtox(vv, TINT) < 0) {
if((c1 & Numuns) || convvtox(vv, TLONG) < 0) {
c = LULCONST;
t = TULONG;
next prev parent reply other threads:[~2022-04-21 7:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-20 10:19 adr
2022-04-20 11:38 ` Charles Forsyth
2022-04-20 14:37 ` adr
2022-04-20 14:37 ` ori
2022-04-21 7:54 ` adr [this message]
2022-04-21 15:29 ` ori
2022-04-28 1:10 ` ori
2022-05-01 12:03 ` adr
2022-04-28 2:43 ` ori
2022-04-28 3:12 ` ori
2022-05-01 12:35 ` adr
2022-05-09 19:31 ` adr
2022-05-10 13:06 ` adr
2022-05-10 14:48 ` adr
2022-06-06 0:35 adr
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