From: Thomas Schwinge <thomas@codesourcery.com>
To: <tdevries@suse.de>, <amonakov@ispras.ru>, <gcc-patches@gcc.gnu.org>
Cc: Thomas Schwinge <thomas@codesourcery.com>
Subject: [PATCH 1/2] Add 'gcc.target/nvptx/softstack-decl-1.c', 'gcc.target/nvptx/uniform-simt-decl-1.c'
Date: Mon, 19 Dec 2022 21:40:06 +0100 [thread overview]
Message-ID: <20221219204007.2818567-1-thomas@codesourcery.com> (raw)
... 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
-----------------
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next reply other threads:[~2022-12-19 20:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-19 20:40 Thomas Schwinge [this message]
2022-12-19 20:40 ` [PATCH 2/2] nvptx: Prevent emitting duplicate declarations for '__nvptx_stacks', '__nvptx_uni' Thomas Schwinge
2023-01-11 11:44 ` [PING] " Thomas Schwinge
2023-01-20 20:30 ` [og12] " Thomas Schwinge
2023-05-12 9:34 ` [PATCH 2/2] " Thomas Schwinge
2023-01-20 20:26 ` [og12] Add 'gcc.target/nvptx/softstack-decl-1.c', 'gcc.target/nvptx/uniform-simt-decl-1.c' Thomas Schwinge
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