... to document the status quo re implicit (via 'need_softstack_decl', 'need_unisimt_decl') and explicit declarations of '__nvptx_stacks', '__nvptx_uni'.
gcc/testsuite/ * gcc.target/nvptx/softstack-decl-1.c: New. * gcc.target/nvptx/uniform-simt-decl-1.c: Likewise. --- .../gcc.target/nvptx/softstack-decl-1.c | 20 +++++++++++++ .../gcc.target/nvptx/uniform-simt-decl-1.c | 29 +++++++++++++++++++ 2 files changed, 49 insertions(+) create mode 100644 gcc/testsuite/gcc.target/nvptx/softstack-decl-1.c create mode 100644 gcc/testsuite/gcc.target/nvptx/uniform-simt-decl-1.c diff --git a/gcc/testsuite/gcc.target/nvptx/softstack-decl-1.c b/gcc/testsuite/gcc.target/nvptx/softstack-decl-1.c new file mode 100644 index 00000000000..c502eacc1b3 --- /dev/null +++ b/gcc/testsuite/gcc.target/nvptx/softstack-decl-1.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options {-save-temps -O0 -msoft-stack} } */ + +extern void *__nvptx_stacks[32] __attribute__((shared,nocommon)); + +void *f() +{ + /* Implicit '__nvptx_stacks' usage for frame; per 'init_softstack_frame': + { dg-final { scan-assembler-times {mov\.u64 %fstmp2, __nvptx_stacks;} 1 } } + */ + void *stack_array[123]; + /* Explicit '__nvptx_stacks' usage. */ + stack_array[5] = __nvptx_stacks[0]; + return stack_array[5]; +} + +/* The implicit (via 'need_softstack_decl') and explicit declarations of + '__nvptx_stacks' are both emitted: + { dg-final { scan-assembler-times {(?n)\.extern .* __nvptx_stacks\[32\];} 2 } } +*/ diff --git a/gcc/testsuite/gcc.target/nvptx/uniform-simt-decl-1.c b/gcc/testsuite/gcc.target/nvptx/uniform-simt-decl-1.c new file mode 100644 index 00000000000..486456ab243 --- /dev/null +++ b/gcc/testsuite/gcc.target/nvptx/uniform-simt-decl-1.c @@ -0,0 +1,29 @@ +/* { dg-do compile } */ +/* { dg-options {-save-temps -O0 -muniform-simt} } */ + +extern unsigned __nvptx_uni[32] __attribute__((shared,nocommon)); + +enum memmodel +{ + MEMMODEL_RELAXED = 0, +}; + +int a = 0; + +int f (void) +{ + /* Explicit '__nvptx_uni' usage. */ + __builtin_printf("%u\n", __nvptx_uni[0]); + + /* Implicit '__nvptx_uni' usage; per 'nvptx_init_unisimt_predicate': + { dg-final { scan-assembler-times {mov\.u64 %r[0-9]+, __nvptx_uni;} 1 } } + */ + int expected = 1; + return __atomic_compare_exchange_n (&a, &expected, 0, 0, MEMMODEL_RELAXED, + MEMMODEL_RELAXED); +} + +/* The implicit (via 'need_unisimt_decl') and explicit declarations of + '__nvptx_uni' are both emitted: + { dg-final { scan-assembler-times {(?n)\.extern .* __nvptx_uni\[32\];} 2 } } +*/ -- 2.25.1 ----------------- Siemens Electronic Design Automation GmbH; Anschrift: Arnulfstraße 201, 80634 München; Gesellschaft mit beschränkter Haftung; Geschäftsführer: Thomas Heurung, Frank Thürauf; Sitz der Gesellschaft: München; Registergericht München, HRB 106955