[gcc r11-5831] builtins: Avoid ICE with __builtin_clear_padding on POINTERS_EXTEND_UNSIGNED targets [PR98147]

[gcc r11-5831] builtins: Avoid ICE with __builtin_clear_padding on POINTERS_EXTEND_UNSIGNED targets [PR98147]

[Jakub Jelinek]

https://gcc.gnu.org/g:b737b70fad398728f6006e8397d1bb31ccea4ce7

commit r11-5831-gb737b70fad398728f6006e8397d1bb31ccea4ce7
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Mon Dec 7 19:20:25 2020 +0100

    builtins: Avoid ICE with __builtin_clear_padding on POINTERS_EXTEND_UNSIGNED targets [PR98147]
    
    The function that calls targetm.emit_call_builtin___clear_cache
    asserts that each of the begin and end operands has either ptr_mode or
    Pmode.
    On most targets that is the same mode, but e.g. on aarch64 -mabi=ilp32
    or a few others it is different.  When a target has a clear cache
    non-library handler, it will use create_address_operand which will do the
    conversion to the right mode automatically, but when emitting a library
    call, we just say the operands are ptr_mode even when they can be Pmode
    too; in that case we need to convert explicitly.
    
    2020-12-07  Jakub Jelinek  <jakub@redhat.com>
    
            PR target/98147
            * builtins.c (default_emit_call_builtin___clear_cache): Call
            convert_memory_address to ptr_mode on both begin and end.
    
            * gcc.dg/pr98147.c: New test.

Diff:
---
 gcc/builtins.c                 |  4 ++--
 gcc/testsuite/gcc.dg/pr98147.c | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/gcc/builtins.c b/gcc/builtins.c
index bd12659712f..faa5030853b 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -7790,8 +7790,8 @@ default_emit_call_builtin___clear_cache (rtx begin, rtx end)
 
   emit_library_call (callee,
 		     LCT_NORMAL, VOIDmode,
-		     begin, ptr_mode,
-		     end, ptr_mode);
+		     convert_memory_address (ptr_mode, begin), ptr_mode,
+		     convert_memory_address (ptr_mode, end), ptr_mode);
 }
 
 /* Emit a call to __builtin___clear_cache, unless the target specifies
diff --git a/gcc/testsuite/gcc.dg/pr98147.c b/gcc/testsuite/gcc.dg/pr98147.c
new file mode 100644
index 00000000000..3edc7985f10
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr98147.c
@@ -0,0 +1,10 @@
+/* PR target/98147 */
+
+char buffer[32] = "foo bar";
+
+int
+main ()
+{
+  __builtin___clear_cache (buffer, buffer + 32);
+  return 0;
+}