clang/test/CodeGen/X86/avx-union.c

   1 // RUN: %clang_cc1 -w -ffreestanding -triple x86_64-linux-gnu -target-feature +avx -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,AVX
   2 // RUN: %clang_cc1 -w -ffreestanding -triple x86_64-linux-gnu -target-feature +avx512f -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,AVX512
   3
   4 // Test Clang 11 and earlier behavior
   5 // RUN: %clang_cc1 -w -ffreestanding -triple x86_64-linux-gnu -target-feature +avx -fclang-abi-compat=10.0 -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK-LEGACY,AVX
   6 // RUN: %clang_cc1 -w -ffreestanding -triple x86_64-linux-gnu -target-feature +avx512f -fclang-abi-compat=11.0 -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK-LEGACY,AVX512-LEGACY
   7 // RUN: %clang_cc1 -w -ffreestanding -triple x86_64-scei-ps4 -target-feature +avx -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-LEGACY
   8 // RUN: %clang_cc1 -w -ffreestanding -triple x86_64-sie-ps5  -target-feature +avx -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-LEGACY
   9
  10 // This tests verifies that a union parameter should pass by a vector regitster whose first eightbyte is SSE and the other eightbytes are SSEUP.
  11
  12 typedef int __m256 __attribute__ ((__vector_size__ (32)));
  13 typedef int __m512 __attribute__ ((__vector_size__ (64)));
  14
  15 union M256 {
  16   double d;
  17   __m256 m;
  18 };
  19
  20 union M512 {
  21   double d;
  22   __m512 m;
  23 };
  24
  25 extern void foo1(union M256 A);
  26 extern void foo2(union M512 A);
  27 union M256 m1;
  28 union M512 m2;
  29 // CHECK-LABEL:   define{{.*}} void @test()
  30 // CHECK:         call void @foo1(<4 x double>
  31 // CHECK-LEGACY:  call void @foo1(ptr noundef byval(%union.M256) align 32
  32 // AVX:           call void @foo2(ptr noundef byval(%union.M512) align 64
  33 // AVX512:        call void @foo2(<8 x double>
  34 // AVX512-LEGACY: call void @foo2(ptr noundef byval(%union.M512) align 64
  35 void test(void) {
  36   foo1(m1);
  37   foo2(m2);
  38 }