https://gcc.gnu.org/g:1597362730241fff464e663f0225b2deef8ffa8f
commit 1597362730241fff464e663f0225b2deef8ffa8f
Author: Thomas Schwinge <tschwi...@baylibre.com>
Date: Mon Dec 16 11:48:11 2024 +0100
nvptx: Add effective-target 'nvptx_softstack', use for effective-target
'alloca'
..., and thereby making the check for effective-target 'alloca' more
explicit.
As of commit 5012919d0bd344ac1888e8e531072f0ccbe24d2c (Subversion r242503)
"nvptx backend prerequisites for OpenMP offloading", the check for
effective-target 'alloca' did "use a compile test"; let's make this more
explicit: supported for '-msoft-stack', not supported otherwise.
gcc/testsuite/
* lib/target-supports.exp
(check_effective_target_nvptx_softstack): New.
(check_effective_target_alloca) [nvptx]: Use it.
gcc/
* doc/sourcebuild.texi (Effective-Target Keywords): Document
'nvptx_softstack'.
Diff:
---
gcc/ChangeLog.omp | 3 +++
gcc/doc/sourcebuild.texi | 3 +++
gcc/testsuite/ChangeLog.omp | 4 ++++
gcc/testsuite/lib/target-supports.exp | 19 +++++++++++++++----
4 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/gcc/ChangeLog.omp b/gcc/ChangeLog.omp
index d06ff6ba1e87..68aada429c25 100644
--- a/gcc/ChangeLog.omp
+++ b/gcc/ChangeLog.omp
@@ -1,5 +1,8 @@
2024-12-18 Thomas Schwinge <tschwi...@baylibre.com>
+ * doc/sourcebuild.texi (Effective-Target Keywords): Document
+ 'nvptx_softstack'.
+
PR target/65181
* config/nvptx/nvptx.h (STACK_SAVEAREA_MODE): '#define'.
* config/nvptx/nvptx.md [!TARGET_SOFT_STACK]
diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
index df2b5bf1ee92..1385f80e9b07 100644
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -2418,6 +2418,9 @@ nvptx code by default compiles for at least PTX ISA
version 6.0.
@item nvptx_runtime_alias_ptx
The nvptx runtime environment supports the PTX ISA directive
@code{.alias}.
+
+@item nvptx_softstack
+nvptx @option{-msoft-stack} is enabled.
@end table
@subsubsection PowerPC-specific attributes
diff --git a/gcc/testsuite/ChangeLog.omp b/gcc/testsuite/ChangeLog.omp
index 0f933749b622..3035aeb85779 100644
--- a/gcc/testsuite/ChangeLog.omp
+++ b/gcc/testsuite/ChangeLog.omp
@@ -1,5 +1,9 @@
2024-12-18 Thomas Schwinge <tschwi...@baylibre.com>
+ * lib/target-supports.exp
+ (check_effective_target_nvptx_softstack): New.
+ (check_effective_target_alloca) [nvptx]: Use it.
+
PR target/65181
* gcc.target/nvptx/__builtin_stack_save___builtin_stack_restore-1.c:
Adjust.
diff --git a/gcc/testsuite/lib/target-supports.exp
b/gcc/testsuite/lib/target-supports.exp
index f52aad73131e..7734d2949ab2 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -994,10 +994,11 @@ proc check_effective_target_alloca {} {
return 0
}
if { [istarget nvptx-*-*] } {
- return [check_no_compiler_messages alloca assembly {
- void f (void*);
- void g (int n) { f (__builtin_alloca (n)); }
- }]
+ if { ![check_effective_target_nvptx_softstack] } {
+ return 0
+ } else {
+ return 1
+ }
}
return 1
}
@@ -13593,6 +13594,16 @@ proc
check_effective_target_nvptx_default_ptx_isa_version_at_least_6_0 { } {
return [check_nvptx_default_ptx_isa_version_at_least 6 0]
}
+# Return 1 if nvptx '-msoft-stack' is enabled.
+
+proc check_effective_target_nvptx_softstack { } {
+ return [check_no_compiler_messages nvptx_softstack assembly {
+ #if !defined(__nvptx_softstack__)
+ #error !__nvptx_softstack__
+ #endif
+ }]
+}
+
# Return 1 if nvptx code with PTX ISA version major.minor or higher can be run.
proc check_nvptx_runtime_ptx_isa_version_at_least { major minor } {
