[gcc r10-9432] rs6000: Fix ICE in rs6000_init_builtins when compiling with -mcpu=440 [PR99279]

[gcc r10-9432] rs6000: Fix ICE in rs6000_init_builtins when compiling with -mcpu=440 [PR99279]

[Peter Bergner]

https://gcc.gnu.org/g:0a35ff4ecdd22745bda9afd8fe095fb469acd624

commit r10-9432-g0a35ff4ecdd22745bda9afd8fe095fb469acd624
Author: Peter Bergner <bergner@linux.ibm.com>
Date:   Thu Feb 25 21:35:28 2021 -0600

    rs6000: Fix ICE in rs6000_init_builtins when compiling with -mcpu=440 [PR99279]
    
    The initialization of compat builtins assumes the builtin we are creating
    a compatible builtin for exists and ICEs if it doesn't.  However, there are
    valid reasons why some builtins are disabled for a particular compile.
    In this case, the MMA builtins are disabled for -mcpu=440 (and other cpus),
    so instead of ICEing, we should just skip adding the MMA compat builtin.
    
    2021-02-25  Peter Bergner  <bergner@linux.ibm.com>
    
    gcc/
            PR target/99279
            * config/rs6000/rs6000-call.c (rs6000_init_builtins): Replace assert
            with an "if" test.
    
    (cherry picked from commit 0159535adb0e7400f2c6922f14a7602f6b90cf69)

Diff:
---
 gcc/config/rs6000/rs6000-call.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/config/rs6000/rs6000-call.c b/gcc/config/rs6000/rs6000-call.c
index e1e0d306ae3..538a57adceb 100644
--- a/gcc/config/rs6000/rs6000-call.c
+++ b/gcc/config/rs6000/rs6000-call.c
@@ -12532,9 +12532,9 @@ rs6000_init_builtins (void)
   for (i = 0; i < ARRAY_SIZE (bdesc_compat); i++, d++)
     {
       tree decl = rs6000_builtin_decls[(int)d->code];
-      gcc_assert (decl != NULL);
-      add_builtin_function (d->name, TREE_TYPE (decl), (int)d->code,
-			    BUILT_IN_MD, NULL, NULL_TREE);
+      if (decl != NULL)
+	add_builtin_function (d->name, TREE_TYPE (decl), (int)d->code,
+			      BUILT_IN_MD, NULL, NULL_TREE);
     }
 }