[Bug target/96005] Add possibility to use newer ptx isa

[vries at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96005

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
On my usual machine, using system cuda I don't get beyond 6.1:
...
diff --git a/gcc/config/nvptx/nvptx.c b/gcc/config/nvptx/nvptx.c
index 7a7a9130e84..ecf3803df3c 100644
--- a/gcc/config/nvptx/nvptx.c
+++ b/gcc/config/nvptx/nvptx.c
@@ -5309,7 +5309,9 @@ static void
 nvptx_file_start (void)
 {
   fputs ("// BEGIN PREAMBLE\n", asm_out_file);
-  fputs ("\t.version\t3.1\n", asm_out_file);
+  /* PTX ISA version 6.1 is the current version for ptxas from cuda 9.1,
+     which is the current system release on ubuntu 18.04.5.  */
+  fputs ("\t.version\t6.1\n", asm_out_file);
   if (TARGET_SM35)
     fputs ("\t.target\tsm_35\n", asm_out_file);
   else
diff --git a/gcc/config/nvptx/nvptx.md b/gcc/config/nvptx/nvptx.md
index 0f15609ee4b..39a695d275c 100644
--- a/gcc/config/nvptx/nvptx.md
+++ b/gcc/config/nvptx/nvptx.md
@@ -1452,7 +1452,7 @@
                 (match_operand:SI 3 "const_int_operand" "n")]
                  UNSPEC_SHUFFLE))]
   ""
-  "%.\\tshfl%S3.b32\\t%0, %1, %2, 31;")
+  "%.\\tshfl.sync%S3.b32\\t%0, %1, %2, 31, 0xffffffff;")

 (define_insn "nvptx_vote_ballot"
   [(set (match_operand:SI 0 "nvptx_register_operand" "=R")
...