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      1 // FIXME: 32-bit target?
      2 // RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -emit-llvm -o - | FileCheck %s
      3 // PR1721
      4 
      5 struct s {
      6   unsigned long long u33: 33;
      7 } a, b;
      8 
      9 // This should have %0 and %1 truncated to 33 bits before any operation.
     10 // This can be done using i33 or an explicit and.
     11 _Bool test(void) {
     12   // CHECK: and i64 %[[TMP1:[^,]+]], 8589934591
     13   // CHECK-NOT: and i64 [[TMP1]], 8589934591
     14   // CHECK: and i64 %{{[^,]+}}, 8589934591
     15   return a.u33 + b.u33 != 0;
     16 }
     17