https://gcc.gnu.org/g:84aa1714c336213a3c8624f7450ea4748e3cdbeb
commit 84aa1714c336213a3c8624f7450ea4748e3cdbeb
Author: Thomas Schwinge <tschwi...@baylibre.com>
Date: Fri Dec 13 13:54:10 2024 +0100
nvptx: Add '__builtin_stack_save()', '__builtin_stack_restore()' test case
[PR65181]
Documenting the status quo.
PR target/65181
gcc/testsuite/
* gcc.target/nvptx/__builtin_stack_save___builtin_stack_restore-1.c:
Add.
Diff:
---
gcc/testsuite/ChangeLog.omp | 4 +++
..._builtin_stack_save___builtin_stack_restore-1.c | 32 ++++++++++++++++++++++
2 files changed, 36 insertions(+)
diff --git a/gcc/testsuite/ChangeLog.omp b/gcc/testsuite/ChangeLog.omp
index 07a6c97cf58a..76c302c02430 100644
--- a/gcc/testsuite/ChangeLog.omp
+++ b/gcc/testsuite/ChangeLog.omp
@@ -1,5 +1,9 @@
2024-12-18 Thomas Schwinge <tschwi...@baylibre.com>
+ PR target/65181
+ * gcc.target/nvptx/__builtin_stack_save___builtin_stack_restore-1.c:
+ Add.
+
PR target/65181
* gcc.target/nvptx/__builtin_alloca_0-1-O0.c: New.
* gcc.target/nvptx/__builtin_alloca_0-1-O1.c: Likewise.
diff --git
a/gcc/testsuite/gcc.target/nvptx/__builtin_stack_save___builtin_stack_restore-1.c
b/gcc/testsuite/gcc.target/nvptx/__builtin_stack_save___builtin_stack_restore-1.c
new file mode 100644
index 000000000000..294014dae1db
--- /dev/null
+++
b/gcc/testsuite/gcc.target/nvptx/__builtin_stack_save___builtin_stack_restore-1.c
@@ -0,0 +1,32 @@
+/* Document what we do for '__builtin_stack_save()',
'__builtin_stack_restore()'. */
+
+/* { dg-do compile }
+ TODO We can't 'assemble' this -- it's invalid PTX code. */
+/* { dg-options {-O3 -mno-soft-stack} } */
+/* { dg-additional-options -save-temps } */
+/* { dg-final { check-function-bodies {** } {} } } */
+
+void *p;
+
+void f(void)
+{
+ p = __builtin_stack_save();
+ asm volatile ("" : : : "memory");
+ __builtin_stack_restore(p);
+ asm volatile ("" : : : "memory");
+}
+/*
+** f:
+** \.visible \.func f
+** {
+** st\.global\.u64 \[p\], %stack;
+** ret;
+*/
+
+/* The concept of a '%stack' pointer doesn't apply like this for
+ '-mno-soft-stack': PTX "native" stacks (TODO).
+
+ { dg-final { scan-assembler-not {%stack} { xfail *-*-* } } } */
+
+/* As these are an internal-use built-in function, we don't bother with
+ emitting proper error diagnostics. */
