llvm-project/llvm/test/FrontendC/2003-08-29-StructLayoutBug.c

// RUN: %llvmgcc -S %s -o - | llvm-as -o /dev/null

struct foo {
  unsigned int I:1;
  unsigned char J[1];
  unsigned int K:1;
 };

void test(struct foo *X) {}