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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/103194] [12 Regression] ice in
 optimize_atomic_bit_test_and with __sync_fetch_and_and since
 r12-5102-gfb161782545224f5
Date: Fri, 12 Nov 2021 13:43:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103194

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
This avoids the crash:

diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c
index 0f79e9f05bd..14c5ecdf119 100644
--- a/gcc/tree-ssa-ccp.c
+++ b/gcc/tree-ssa-ccp.c
@@ -3443,7 +3443,7 @@ optimize_atomic_bit_test_and (gimple_stmt_iterator *g=
sip,
     ibit =3D 0;
   }
       else if (TYPE_PRECISION (TREE_TYPE (use_lhs))
-         =3D=3D TYPE_PRECISION (TREE_TYPE (use_rhs)))
+         <=3D TYPE_PRECISION (TREE_TYPE (use_rhs)))
   {
     gimple *use_nop_stmt;
     if (!single_imm_use (use_lhs, &use_p, &use_nop_stmt)

But nop_atomic_bit_test_and_p should handle cast.  Hongtao, please take a l=
ook.=