[PATCH] Fix nvptx_output_softstack_switch (PR target/90811)

[Jakub Jelinek]

Hi!

In PTX, and accepts only .pred, .b16, .b32 and .b64 types, not .u64 etc.
Fixed thusly, bootstrapped/regtested on x86_64-linux with nvptx-none
offloading, ok for trunk and 9.2/8.4?

I'll try to figure out tomorrow if we can avoid the overaligned variables in
this specific testcase, but generally there is always the possibility of
overaligned vars.

2019-06-10  Jakub Jelinek  <ja...@redhat.com>

        PR target/90811
        * config/nvptx/nvptx.c (nvptx_output_softstack_switch): Use and.b%d
        instead of and.u%d.

        * testsuite/libgomp.c/pr90811.c: New test.

--- gcc/config/nvptx/nvptx.c.jj 2019-03-11 22:56:55.934666848 +0100
+++ gcc/config/nvptx/nvptx.c    2019-06-10 15:20:43.154588406 +0200
@@ -1475,7 +1475,7 @@ nvptx_output_softstack_switch (FILE *fil
       fputs (";\n", file);
       if (!CONST_INT_P (size) || UINTVAL (align) > GET_MODE_SIZE (DImode))
        fprintf (file,
-                "\t\tand.u%d %%r%d, %%r%d, -" HOST_WIDE_INT_PRINT_DEC ";\n",
+                "\t\tand.b%d %%r%d, %%r%d, -" HOST_WIDE_INT_PRINT_DEC ";\n",
                 bits, regno, regno, UINTVAL (align));
     }
   if (cfun->machine->has_softstack)
--- libgomp/testsuite/libgomp.c/pr90811.c.jj    2019-06-10 15:43:30.464115978 
+0200
+++ libgomp/testsuite/libgomp.c/pr90811.c       2019-06-10 15:43:37.618003812 
+0200
@@ -0,0 +1,29 @@
+/* PR target/90811 */
+
+int
+main ()
+{
+  long long a[100], b[100];
+  int i;
+  for (i = 0; i < 100; i++)
+    {
+      a[i] = i;
+      b[i] = i % 10;
+    }
+  #pragma omp target teams distribute parallel for simd map(tofrom: a[:100], 
b[:100])
+  for (i = 0; i < 100; i++)
+    {
+      long long c = 0;
+      const long long d[] = { 1, 3, 5, 7, 9 };
+      for (int j = 4; j >= 0; j--)
+         c = d[j] + b[i] * c;
+      a[i] += c;
+    }
+  for (i = 0; i < 100; i++)
+    {
+      const long long r[] = { 1, 26, 229, 976, 2849, 6646, 13381, 24284, 
40801, 64594 };
+      if (a[i] != r[i % 10] + (i / 10 * 10))
+       __builtin_abort ();
+    }
+  return 0;
+}

        Jakub