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      1 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
      2 
      3 union U { int x; char* p; };
      4 void foo() {
      5   union U bar;
      6   // CHECK: call void asm
      7   __asm__ volatile("foo %0\n" :: "r"(bar));
      8 }
      9