[gcc r12-5984] [PR100518] store by mult pieces: keep addr in Pmode

[Alexandre Oliva]

https://gcc.gnu.org/g:71cc9b8c39148d19a8043b74ca8b6b4e8b8072ca

commit r12-5984-g71cc9b8c39148d19a8043b74ca8b6b4e8b8072ca
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Wed Dec 15 02:22:34 2021 -0300

    [PR100518] store by mult pieces: keep addr in Pmode
    
    The conversion of a MEM address to ptr_mode in
    try_store_by_multiple_pieces was misguided: copy_addr_to_reg expects
    Pmode for addresses.
    
    
    for  gcc/ChangeLog
    
            PR target/100518
            * builtins.c (try_store_by_multiple_pieces): Drop address
            conversion to ptr_mode.
    
    for  gcc/testsuite/ChangeLog
    
            PR target/100518
            * gcc.target/aarch64/pr100518.c: New.

Diff:
---
 gcc/builtins.c                              | 2 +-
 gcc/testsuite/gcc.target/aarch64/pr100518.c | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gcc/builtins.c b/gcc/builtins.c
index 304d87dafb7..cd8947b4de2 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -4003,7 +4003,7 @@ try_store_by_multiple_pieces (rtx to, rtx len, unsigned int ctz_len,
       constfundata = &valc;
     }
 
-  rtx ptr = copy_addr_to_reg (convert_to_mode (ptr_mode, XEXP (to, 0), 0));
+  rtx ptr = copy_addr_to_reg (XEXP (to, 0));
   rtx rem = copy_to_mode_reg (ptr_mode, convert_to_mode (ptr_mode, len, 0));
   to = replace_equiv_address (to, ptr);
   set_mem_align (to, align);
diff --git a/gcc/testsuite/gcc.target/aarch64/pr100518.c b/gcc/testsuite/gcc.target/aarch64/pr100518.c
new file mode 100644
index 00000000000..5ca599f5d2e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/pr100518.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-mabi=ilp32 -mstrict-align -O2" } */
+
+int unsigned_range_min, unsigned_range_max, a11___trans_tmp_1;
+
+void a11() {
+  a11___trans_tmp_1 = unsigned_range_max < unsigned_range_min;
+  __builtin_memset((char *)1, 0, a11___trans_tmp_1);
+}