[PATCH] c/104505 - ICE with internal function call in diagnostic expression

[Richard Biener via Gcc-patches]

The following handles internal function calls similar to how the
C++ frontend does, avoiding ICEing on those.

Bootstrapped and tested on x86_64-unkown-linux-gnu, OK?

Thanks,
Richard.

2022-02-14  Richard Biener  <rguent...@suse.de>

        PR c/104505
gcc/c-family/
        * c-pretty-print.cc (c_pretty_printer::postfix_expression): Handle
        internal function calls.

gcc/testsuite/
        * c-c++-common/pr104505.c: New testcase.
---
 gcc/c-family/c-pretty-print.cc        |  6 +++++-
 gcc/testsuite/c-c++-common/pr104505.c | 12 ++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/c-c++-common/pr104505.c

diff --git a/gcc/c-family/c-pretty-print.cc b/gcc/c-family/c-pretty-print.cc
index ceedaea962a..dac17753acb 100644
--- a/gcc/c-family/c-pretty-print.cc
+++ b/gcc/c-family/c-pretty-print.cc
@@ -32,6 +32,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "selftest.h"
 #include "langhooks.h"
 #include "options.h"
+#include "internal-fn.h"
 
 /* The pretty-printer code is primarily designed to closely follow
    (GNU) C and C++ grammars.  That is to be contrasted with spaghetti
@@ -1601,7 +1602,10 @@ c_pretty_printer::postfix_expression (tree e)
       {
        call_expr_arg_iterator iter;
        tree arg;
-       postfix_expression (CALL_EXPR_FN (e));
+       if (CALL_EXPR_FN (e) != NULL_TREE)
+         postfix_expression (CALL_EXPR_FN (e));
+       else
+         pp_string (this, internal_fn_name (CALL_EXPR_IFN (e)));
        pp_c_left_paren (this);
        FOR_EACH_CALL_EXPR_ARG (arg, iter, e)
          {
diff --git a/gcc/testsuite/c-c++-common/pr104505.c 
b/gcc/testsuite/c-c++-common/pr104505.c
new file mode 100644
index 00000000000..7fa3d841197
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr104505.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+
+typedef char __attribute__((__vector_size__ (8))) U;
+typedef short __attribute__((__vector_size__ (16))) V;
+
+U u;
+
+void
+foo (V v)
+{
+  u = __builtin_shufflevector (u, u, __builtin_convertvector (v, U)); /* { 
dg-error "invalid element index" } */
+}
-- 
2.34.1