[PATCH] Another ICE after conflicting types of redeclaration [PR109619]

[Andrew Pinski <quic_apinski@quicinc.com>]

This another one of these ICE after error issues with the
gimplifier and a fallout from r12-3278-g823685221de986af.
This case happens when we are trying to fold memcpy/memmove.
There is already code to try to catch ERROR_MARKs as arguments
to the builtins so just need to change them to use error_operand_p
which checks the type of the expression to see if it was an error mark
also.

Bootstrapped and tested on x86_64-linux-gnu with no regressions.

gcc/ChangeLog:

	PR c/109619
	* builtins.cc (fold_builtin_1): Use error_operand_p
	instead of checking against ERROR_MARK.
	(fold_builtin_2): Likewise.
	(fold_builtin_3): Likewise.

gcc/testsuite/ChangeLog:

	PR c/109619
	* gcc.dg/redecl-26.c: New test.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>
---
 gcc/builtins.cc                  | 12 ++++++------
 gcc/testsuite/gcc.dg/redecl-26.c | 14 ++++++++++++++
 2 files changed, 20 insertions(+), 6 deletions(-)
 create mode 100644 gcc/testsuite/gcc.dg/redecl-26.c

diff --git a/gcc/builtins.cc b/gcc/builtins.cc
index eda8bea9c4b..bb74b5cbcd6 100644
--- a/gcc/builtins.cc
+++ b/gcc/builtins.cc
@@ -10461,7 +10461,7 @@ fold_builtin_1 (location_t loc, tree expr, tree fndecl, tree arg0)
   tree type = TREE_TYPE (TREE_TYPE (fndecl));
   enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
 
-  if (TREE_CODE (arg0) == ERROR_MARK)
+  if (error_operand_p (arg0))
     return NULL_TREE;
 
   if (tree ret = fold_const_call (as_combined_fn (fcode), type, arg0))
@@ -10601,8 +10601,8 @@ fold_builtin_2 (location_t loc, tree expr, tree fndecl, tree arg0, tree arg1)
   tree type = TREE_TYPE (TREE_TYPE (fndecl));
   enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
 
-  if (TREE_CODE (arg0) == ERROR_MARK
-      || TREE_CODE (arg1) == ERROR_MARK)
+  if (error_operand_p (arg0)
+      || error_operand_p (arg1))
     return NULL_TREE;
 
   if (tree ret = fold_const_call (as_combined_fn (fcode), type, arg0, arg1))
@@ -10693,9 +10693,9 @@ fold_builtin_3 (location_t loc, tree fndecl,
   tree type = TREE_TYPE (TREE_TYPE (fndecl));
   enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
 
-  if (TREE_CODE (arg0) == ERROR_MARK
-      || TREE_CODE (arg1) == ERROR_MARK
-      || TREE_CODE (arg2) == ERROR_MARK)
+  if (error_operand_p (arg0)
+      || error_operand_p (arg1)
+      || error_operand_p (arg2))
     return NULL_TREE;
 
   if (tree ret = fold_const_call (as_combined_fn (fcode), type,
diff --git a/gcc/testsuite/gcc.dg/redecl-26.c b/gcc/testsuite/gcc.dg/redecl-26.c
new file mode 100644
index 00000000000..5f8889c4c39
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/redecl-26.c
@@ -0,0 +1,14 @@
+/* We used to ICE while folding memcpy and memmove.
+   PR c/109619. */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+int *a1, *a2;
+
+void foo(__SIZE_TYPE__ a3) /* { dg-note "" }  */
+{
+  __builtin_memcpy(a1, a2, a3);
+  __builtin_memmove(a1, a2, a3);
+  int *a3; /* { dg-error "redeclared as different kind of symbol" } */
+}
+
-- 
2.43.0