public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug middle-end/46399] New: Missing type promotion for library call argument @ 2010-11-09 17:09 krebbel at gcc dot gnu.org 2010-11-09 17:10 ` [Bug middle-end/46399] " krebbel at gcc dot gnu.org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2010-11-09 17:09 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46399 Summary: Missing type promotion for library call argument Product: gcc Version: 4.4.3 Status: UNCONFIRMED Severity: major Priority: P3 Component: middle-end AssignedTo: unassigned@gcc.gnu.org ReportedBy: krebbel@gcc.gnu.org The following testcase produces an unexpected result when compiled with: gcc -O3 t.c -ot int main () { volatile _Decimal32 b, c; volatile unsigned int ui; volatile long long sll; ui = 1; sll = 1LL; b = sll; c = ui; printf("b: %x\n", *(int*)&b); printf("c: %x\n", *(int*)&c); } ./t: b: 22500001 c: 3a95e225 The problem appears to be a missing type promotion when doing the conversion from unsigned int to _Decimal32 in c = ui: stmg %r14,%r15,112(%r15) aghi %r15,-184 lhi %r1,1 st %r1,180(%r15) lghi %r1,1 stg %r1,160(%r15) lg %r2,160(%r15) <-- load a 64bit value into r2 brasl %r14,__dpd_floatdisd ste %f0,172(%r15) l %r2,180(%r15) <-- load a 32bit value into r2 brasl %r14,__dpd_floatunssisd without zero extending to 64bit .... When I manually kill the upper 32 bits of r2 before doing the second lib call it works fine: stmg %r14,%r15,112(%r15) aghi %r15,-184 .cfi_offset 15, -40 .cfi_offset 14, -48 .cfi_def_cfa_offset 344 lhi %r1,1 st %r1,180(%r15) lghi %r1,1 stg %r1,160(%r15) lg %r2,160(%r15) brasl %r14,__dpd_floatdisd ste %f0,172(%r15) lghi %r2,0 <-- load a 64bit 0 into r2 l %r2,180(%r15) brasl %r14,__dpd_floatunssisd ... The result then is: b: 22500001 c: 22500001 The testcase above is extracted from gcc.dg/dfp/pr41049.c which currently seems to fail due to that problem on s390*. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/46399] Missing type promotion for library call argument 2010-11-09 17:09 [Bug middle-end/46399] New: Missing type promotion for library call argument krebbel at gcc dot gnu.org @ 2010-11-09 17:10 ` krebbel at gcc dot gnu.org 2011-05-09 8:56 ` krebbel at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2010-11-09 17:10 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46399 Andreas Krebbel <krebbel at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Priority|P3 |P2 Known to fail| |4.4.3, 4.5.2, 4.6.0 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/46399] Missing type promotion for library call argument 2010-11-09 17:09 [Bug middle-end/46399] New: Missing type promotion for library call argument krebbel at gcc dot gnu.org 2010-11-09 17:10 ` [Bug middle-end/46399] " krebbel at gcc dot gnu.org @ 2011-05-09 8:56 ` krebbel at gcc dot gnu.org 2011-05-09 9:24 ` krebbel at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2011-05-09 8:56 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46399 Andreas Krebbel <krebbel at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED AssignedTo|unassigned at gcc dot |krebbel at gcc dot gnu.org |gnu.org | ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/46399] Missing type promotion for library call argument 2010-11-09 17:09 [Bug middle-end/46399] New: Missing type promotion for library call argument krebbel at gcc dot gnu.org 2010-11-09 17:10 ` [Bug middle-end/46399] " krebbel at gcc dot gnu.org 2011-05-09 8:56 ` krebbel at gcc dot gnu.org @ 2011-05-09 9:24 ` krebbel at gcc dot gnu.org 2013-07-31 7:59 ` krebbel at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2011-05-09 9:24 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46399 Andreas Krebbel <krebbel at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2011.05.09 08:54:00 Ever Confirmed|0 |1 Known to fail| |4.7.0 --- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> 2011-05-09 08:54:00 UTC --- Fixed for mainline with: Re: [PING] Fix PR46399 - missing mode promotion for libcall args http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01354.html plus the requested changes from: http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01988.html and a build failure for PROMOTE_MODE targets fixed with: svn revision: 173376 I'll request applying the backported patch after the fix did hang around for a while in mainline. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/46399] Missing type promotion for library call argument 2010-11-09 17:09 [Bug middle-end/46399] New: Missing type promotion for library call argument krebbel at gcc dot gnu.org ` (2 preceding siblings ...) 2011-05-09 9:24 ` krebbel at gcc dot gnu.org @ 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2013-07-31 7:59 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46399 --- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> --- Closed. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/46399] Missing type promotion for library call argument 2010-11-09 17:09 [Bug middle-end/46399] New: Missing type promotion for library call argument krebbel at gcc dot gnu.org ` (3 preceding siblings ...) 2013-07-31 7:59 ` krebbel at gcc dot gnu.org @ 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2013-07-31 7:59 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46399 Andreas Krebbel <krebbel at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED --- Comment #4 from Andreas Krebbel <krebbel at gcc dot gnu.org> --- Closed. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/46399] Missing type promotion for library call argument 2010-11-09 17:09 [Bug middle-end/46399] New: Missing type promotion for library call argument krebbel at gcc dot gnu.org ` (4 preceding siblings ...) 2013-07-31 7:59 ` krebbel at gcc dot gnu.org @ 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: krebbel at gcc dot gnu.org @ 2013-07-31 7:59 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46399 Andreas Krebbel <krebbel at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #2 from Andreas Krebbel <krebbel at gcc dot gnu.org> --- Fixed. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2013-07-31 7:59 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2010-11-09 17:09 [Bug middle-end/46399] New: Missing type promotion for library call argument krebbel at gcc dot gnu.org 2010-11-09 17:10 ` [Bug middle-end/46399] " krebbel at gcc dot gnu.org 2011-05-09 8:56 ` krebbel at gcc dot gnu.org 2011-05-09 9:24 ` krebbel at gcc dot gnu.org 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 2013-07-31 7:59 ` krebbel at gcc dot gnu.org 2013-07-31 7:59 ` krebbel at gcc dot gnu.org
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).