clang/test/CodeGenCXX/finegrain-bitfield-type.cpp

   1 // RUN: %clang_cc1 -triple x86_64-linux-gnu -ffine-grained-bitfield-accesses \
   2 // RUN:   -emit-llvm -o - %s | FileCheck %s
   3 // RUN: %clang_cc1 -triple riscv64-linux-gnu -ffine-grained-bitfield-accesses \
   4 // RUN:   -emit-llvm -o - %s | FileCheck %s
   5
   6 // Note: This test checks the X86-64 and RISC-V targets in order to explore
   7 // behaviour when i8/i16 are native integer widths (X86-64) and when they're
   8 // not (RISC-V).
   9
  10 struct S4 {
  11   unsigned long f1:28;
  12   unsigned long f2:4;
  13   unsigned long f3:12;
  14 };
  15 struct S4 a4;
  16
  17 struct S5 {
  18   unsigned long f1:28;
  19   unsigned long f2:4;
  20   unsigned long f3:28;
  21   unsigned long f4:4;
  22   unsigned long f5:12;
  23 };
  24 struct S5 a5;
  25
  26 // CHECK: %struct.S4 = type { i32, i16 }
  27 // CHECK-NOT: %struct.S4 = type { i48 }
  28 // CHECK: %struct.S5 = type { i32, i32, i16, [6 x i8] }
  29 // CHECK-NOT: %struct.S5 = type { i80 }