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From: "jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug debug/55056] [4.8 Regression] -O0 -g missing location for register double var Date: Thu, 25 Oct 2012 08:23:00 -0000 [thread overview] Message-ID: <bug-55056-4-LbuLp1XJOB@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-55056-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55056 --- Comment #5 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2012-10-25 08:23:20 UTC --- (In reply to comment #3) > -Og -g0 doesn't produce debug info, so it should fail all debugger tests. > -Og -g should work. -Og -g0 is needed for GDB testsuite which expects unchanged CFLAGS produce no DWARF while adding -g to them produces the proper (-Og in this case) dwarf. >From GCC standpoint it was -Og -g0 -g. -Og is not usable with GDB testsuite without heavy work on the testsuite. If this PR is WONTFIXed I can adjust the few GDB testcases to cope with the missing location with -O0 -g. (In reply to comment #4) > Anyway, this "regression" is due to LRA which even for -O0 generates better > code, CCing Vlad to see why old reload pushed the l var into its own stack > slot, even when it is register and thus it doesn't have to do that. For types up to double "register" keyword stores it to int registers like %rbx. long double is really stored in stack memory in the code so this GDB testcase intended for register-stored values has nothing to test and it can be skipped (for long double). I do not understand why "register" does not keep the value on FPU stack.
next prev parent reply other threads:[~2012-10-25 8:23 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-10-24 14:22 [Bug debug/55056] New: " jan.kratochvil at redhat dot com 2012-10-24 14:28 ` [Bug debug/55056] " rguenth at gcc dot gnu.org 2012-10-24 15:23 ` jan.kratochvil at redhat dot com 2012-10-25 6:35 ` jakub at gcc dot gnu.org 2012-10-25 7:14 ` jakub at gcc dot gnu.org 2012-10-25 8:23 ` jan.kratochvil at redhat dot com [this message] 2012-12-07 12:06 ` rguenth at gcc dot gnu.org 2013-01-26 20:29 ` jan.kratochvil at redhat dot com 2013-02-26 15:13 ` rguenth at gcc dot gnu.org 2013-03-22 14:48 ` [Bug debug/55056] [4.8/4.9 " jakub at gcc dot gnu.org 2013-05-31 10:59 ` jakub at gcc dot gnu.org 2013-10-16 9:50 ` jakub at gcc dot gnu.org 2013-10-25 11:46 ` rguenth at gcc dot gnu.org
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