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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/53776] New: pragma optimize does not support Os Date: Tue, 26 Jun 2012 08:15:00 -0000 [thread overview] Message-ID: <bug-53776-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53776 Bug #: 53776 Summary: pragma optimize does not support Os Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned@gcc.gnu.org ReportedBy: vincenzo.innocente@cern.ch I need to compile optimized for size some portion of code. The easiest is to "inject" pragmas in the source code at building time unfortunately Os (and I think also Ofast) are not supported in pragma optimize (and I think also not by __attribute__) only numbers works for instance take cat optopt.cc #pragma GCC optimize ("s") void bar(int); inline void foo(int i, int j) { if (i>0) bar(i); if (j>0) bar(j); if (i>0) bar(j); if (j>0) bar(i); }; void foo1(int i, int j) { foo(i,j); } void foo2(int i, int j) { foo(i,j); } void foo3(int i, int j) { foo(i,j); } c++ -O2 -c optopt.cc; nm -C optopt.o U bar(int) 0000000000000000 T foo1(int, int) 0000000000000060 T foo2(int, int) 00000000000000c0 T foo3(int, int) c++ -Os -c optopt.cc; nm -C optopt.o U bar(int) 0000000000000000 W foo(int, int) 0000000000000000 T foo1(int, int) 0000000000000005 T foo2(int, int) 000000000000000a T foo3(int, int) with #pragma GCC optimize ("1") one gets what intended c++ -O2 -c optopt.cc; nm -C optopt.o U bar(int) 0000000000000000 W foo(int, int) 0000000000000000 T foo1(int, int) 0000000000000010 T foo2(int, int) 0000000000000020 T foo3(int, int)
next reply other threads:[~2012-06-26 8:15 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-06-26 8:15 vincenzo.innocente at cern dot ch [this message] 2012-06-26 8:43 ` [Bug middle-end/53776] " pinskia at gcc dot gnu.org 2012-06-26 8:58 ` rguenth at gcc dot gnu.org 2021-08-12 5:41 ` pinskia at gcc dot gnu.org 2021-11-29 6:47 ` pinskia at gcc dot gnu.org 2021-12-23 4:11 ` [Bug ipa/53776] " pinskia at gcc dot gnu.org
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