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* [gcc/devel/omp/gcc-12] amdgcn: Pass -mstack-size through to runtime
@ 2023-02-07 9:56 Andrew Stubbs
0 siblings, 0 replies; only message in thread
From: Andrew Stubbs @ 2023-02-07 9:56 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:196b25d7b9b73fa89ffb2f6dc73b851584f81127
commit 196b25d7b9b73fa89ffb2f6dc73b851584f81127
Author: Andrew Stubbs <ams@codesourcery.com>
Date: Mon Feb 6 12:47:28 2023 +0000
amdgcn: Pass -mstack-size through to runtime
But only for the offload case.
gcc/ChangeLog:
* config/gcn/mkoffload.cc (gcn_stack_size): New global variable.
(process_asm): Create a constructor for GCN_STACK_SIZE.
(main): Parse the -mstack-size option.
(cherry picked from commit 45e01229af33a3dc3f124dcaec4b4ae11e9d07ce)
Diff:
---
gcc/ChangeLog.omp | 6 ++++++
gcc/config/gcn/mkoffload.cc | 18 ++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/gcc/ChangeLog.omp b/gcc/ChangeLog.omp
index f7d0c439245..4205a15ef7b 100644
--- a/gcc/ChangeLog.omp
+++ b/gcc/ChangeLog.omp
@@ -1,3 +1,9 @@
+2023-02-06 Andrew Stubbs <ams@codesourcery.com>
+
+ * config/gcn/mkoffload.cc (gcn_stack_size): New global variable.
+ (process_asm): Create a constructor for GCN_STACK_SIZE.
+ (main): Parse the -mstack-size option.
+
2023-02-06 Andrew Stubbs <ams@codesourcery.com>
* config/gcn/gcn-run.cc: Include libgomp-gcn.h.
diff --git a/gcc/config/gcn/mkoffload.cc b/gcc/config/gcn/mkoffload.cc
index 14d7eedc790..3af3f717ea6 100644
--- a/gcc/config/gcn/mkoffload.cc
+++ b/gcc/config/gcn/mkoffload.cc
@@ -123,6 +123,8 @@ uint32_t elf_arch = EF_AMDGPU_MACH_AMDGCN_GFX803; // Default GPU architecture.
uint32_t elf_flags =
(EF_AMDGPU_FEATURE_XNACK_ANY_V4 | EF_AMDGPU_FEATURE_SRAMECC_ANY_V4);
+static int gcn_stack_size = 0; /* Zero means use default. */
+
/* Delete tempfiles. */
void
@@ -701,6 +703,18 @@ process_asm (FILE *in, FILE *out, FILE *cfile)
? "val[0] != '1' || val[1] != '\\0'"
: "val[0] == '1' && val[1] == '\\0'"));
+ /* Set the stack size if the user configured a value. */
+ if (gcn_stack_size)
+ fprintf (cfile,
+ "static __attribute__((constructor))\n"
+ "void configure_stack_size (void)\n"
+ "{\n"
+ " const char *val = getenv (\"GCN_STACK_SIZE\");\n"
+ " if (!val || val[0] == '\\0')\n"
+ " setenv (\"GCN_STACK_SIZE\", \"%d\", true);\n"
+ "}\n\n",
+ gcn_stack_size);
+
obstack_free (&fns_os, NULL);
for (i = 0; i < dims_count; i++)
free (dims[i].name);
@@ -961,6 +975,10 @@ main (int argc, char **argv)
elf_arch = EF_AMDGPU_MACH_AMDGCN_GFX908;
else if (strcmp (argv[i], "-march=gfx90a") == 0)
elf_arch = EF_AMDGPU_MACH_AMDGCN_GFX90a;
+#define STR "-mstack-size="
+ else if (startswith (argv[i], STR))
+ gcn_stack_size = atoi (argv[i] + strlen (STR));
+#undef STR
}
if (!(fopenacc ^ fopenmp))
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