https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100059
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vries at gcc dot gnu.org
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
For
#pragma omp declare target link(a,c,b,i)
the vars are walked in reverse order (= in normal order of 'offload_vars'):
* In a.xnvptx-none.mkoffload.s:
------------
//:FUNC_MAP "main$_omp_fn$0"
//:VAR_MAP "i$linkptr"
// BEGIN GLOBAL VAR DEF: i$linkptr
.visible .global .align 8 .u64 i$linkptr[1];
//:VAR_MAP "b$linkptr"
// BEGIN GLOBAL VAR DEF: b$linkptr
.visible .global .align 8 .u64 b$linkptr[1];
//:VAR_MAP "c$linkptr"
// BEGIN GLOBAL VAR DEF: c$linkptr
.visible .global .align 8 .u64 c$linkptr[1];
//:VAR_MAP "a$linkptr"
// BEGIN GLOBAL VAR DEF: a$linkptr
.visible .global .align 8 .u64 a$linkptr[1];
// BEGIN GLOBAL FUNCTION DECL: gomp_nvptx_main
------------
So far so good. However, after:
nvptx-none/bin/as -m sm_35 -o ./a.xnvptx-none.mkoffload.o
./a.xnvptx-none.mkoffload.s
the 'a.xnvptx-none.mkoffload.o' contains:
----------------
// BEGIN GLOBAL VAR DECL: __nvptx_uni
.extern .shared .u32 __nvptx_uni[32];
//:VAR_MAP "b$linkptr"
// BEGIN GLOBAL VAR DEF: b$linkptr
.visible .global .align 8 .u64 b$linkptr[1];
//:FUNC_MAP "main$_omp_fn$0"
//:VAR_MAP "i$linkptr"
// BEGIN GLOBAL VAR DEF: i$linkptr
.visible .global .align 8 .u64 i$linkptr[1];
//:VAR_MAP "c$linkptr"
// BEGIN GLOBAL VAR DEF: c$linkptr
.visible .global .align 8 .u64 c$linkptr[1];
//:VAR_MAP "a$linkptr"
// BEGIN GLOBAL VAR DEF: a$linkptr
.visible .global .align 8 .u64 a$linkptr[1];
// BEGIN GLOBAL FUNCTION DEF: update
----------------
Namely: 'b' and 'i' swapped the order!
The problem seems to be the misplaced:
//:FUNC_MAP "main$_omp_fn$0"
