* [Bug target/65181] Support for alloca in nvptx
[not found] <bug-65181-4@http.gcc.gnu.org/bugzilla/>
@ 2015-02-23 18:05 ` tschwinge at gcc dot gnu.org
2020-05-27 8:16 ` burnus at gcc dot gnu.org
2021-06-29 16:00 ` tschwinge at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: tschwinge at gcc dot gnu.org @ 2015-02-23 18:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65181
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Mon Feb 23 17:51:41 2015
New Revision: 220915
URL: https://gcc.gnu.org/viewcvs?rev=220915&root=gcc&view=rev
Log:
[PR target/65181] nvptx libgcc: Prevent building "advanced" stuff (for example,
gcov support)
When building GCC against a proper newlib sysroot, the libgcc build will
include more than what's built in the -Dinhibit_libc configuration used when
building newlib as part of the GCC build process. See the inhibit_libc logic
in gcc/configure.ac.
To avoid...
ptxas _gcov_indirect_call_topn_profiler.o, line 101; error : Type or
alignment of argument does not match formal parameter 'ptr'
ptxas _gcov_indirect_call_topn_profiler.o, line 101; error : Call has
wrong number of parameters
ptxas _gcov_indirect_call_topn_profiler.o, line 101; error : Type or
alignment of argument does not match formal parameter 'size'
ptxas fatal : Ptx assembly aborted due to errors
nvptx-as: ptxas returned 255 exit status
make[2]: *** [_gcov_indirect_call_topn_profiler.o] Error 1
..., "dumb down" the libgcc build:
libgcc/
PR target/65181
* config/nvptx/t-nvptx (INHIBIT_LIBC_CFLAGS): Define to
-Dinhibit_libc.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/config/nvptx/t-nvptx
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug target/65181] Support for alloca in nvptx
[not found] <bug-65181-4@http.gcc.gnu.org/bugzilla/>
2015-02-23 18:05 ` [Bug target/65181] Support for alloca in nvptx tschwinge at gcc dot gnu.org
@ 2020-05-27 8:16 ` burnus at gcc dot gnu.org
2021-06-29 16:00 ` tschwinge at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: burnus at gcc dot gnu.org @ 2020-05-27 8:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65181
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openacc
CC| |burnus at gcc dot gnu.org
--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Slightly stupid example which currently fails with:
sorry, unimplemented: target cannot support alloca.
x86_64-none-linux-gnu-accel-nvptx-none-gcc returned 1 exit status
call foo(10)
contains
subroutine foo(nn)
!$acc parallel
block
real :: array(nn), array2(10)
array = [(3*i,i=1,nn)]
!print *, array
!$acc loop gang private(array)
do i = 1, 10
array(i) = i
array2(i) = array(i)
end do
!print *, array
!print *, array2
end block
!$acc end parallel
end
end
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug target/65181] Support for alloca in nvptx
[not found] <bug-65181-4@http.gcc.gnu.org/bugzilla/>
2015-02-23 18:05 ` [Bug target/65181] Support for alloca in nvptx tschwinge at gcc dot gnu.org
2020-05-27 8:16 ` burnus at gcc dot gnu.org
@ 2021-06-29 16:00 ` tschwinge at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: tschwinge at gcc dot gnu.org @ 2021-06-29 16:00 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65181
--- Comment #5 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
While reviewing other things, I found that "'alloca' is a preview feature in
PTX ISA version 7.3", and "requires 'sm_52' or higher". That got published
2021-05, so it'll be a while until we can reliably use it, but we're getting
there... ;-)
^ permalink raw reply [flat|nested] 3+ messages in thread