================
@@ -0,0 +1,10 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=optin.portability.UnixAPI \
+// RUN:    -triple x86_64-pc-linux-gnu -x c %s
+
+// Don't crash!
+// expected-no-diagnostics
+const __int128_t a = ( ((__int128_t)1) << 64 | 1);
----------------
vabridgers wrote:

Hmm, I added this for no particular reason at the time. I'll try without it. I 
could not find a numeric literal suffix for a 128 bit number, this case was 
originally found by multiplying 2 64-bit numbers into a 128-bit number, and I 
simplified that. 

https://github.com/llvm/llvm-project/pull/67212
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