clang/test/CodeGen/sysv_abi.c

   1 // RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm  -target-cpu skylake-avx512 < %s | FileCheck %s --check-prefixes=CHECK,AVX
   2 // RUN: %clang_cc1 -triple x86_64-linux -emit-llvm  -target-cpu skylake-avx512 < %s | FileCheck %s --check-prefixes=CHECK,AVX
   3 // RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm < %s | FileCheck %s --check-prefixes=CHECK,NOAVX
   4 // RUN: %clang_cc1 -triple x86_64-linux -emit-llvm < %s | FileCheck %s --check-prefixes=CHECK,NOAVX
   5
   6 #define SYSV_CC __attribute__((sysv_abi))
   7
   8 // Make sure we coerce structs according to the SysV rules instead of passing
   9 // them indirectly as we would for Win64.
  10 struct StringRef {
  11   char *Str;
  12   __SIZE_TYPE__ Size;
  13 };
  14 extern volatile char gc;
  15 void SYSV_CC take_stringref(struct StringRef s);
  16 void callit(void) {
  17   struct StringRef s = {"asdf", 4};
  18   take_stringref(s);
  19 }
  20 // CHECK: define {{(dso_local )?}}void @callit()
  21 // CHECK: call {{(x86_64_sysvcc )?}}void @take_stringref(ptr {{[^,]*}}, i64 {{[^,]*}})
  22 // CHECK: declare {{(dso_local )?}}{{(x86_64_sysvcc )?}}void @take_stringref(ptr, i64)
  23
  24 // Check that we pass vectors directly if the target feature is enabled, and
  25 // not otherwise.
  26 typedef __attribute__((vector_size(32))) float my_m256;
  27 typedef __attribute__((vector_size(64))) float my_m512;
  28
  29 my_m256 SYSV_CC get_m256(void);
  30 void SYSV_CC take_m256(my_m256);
  31 my_m512 SYSV_CC get_m512(void);
  32 void SYSV_CC take_m512(my_m512);
  33
  34 void use_vectors(void) {
  35   my_m256 v1 = get_m256();
  36   take_m256(v1);
  37   my_m512 v2 = get_m512();
  38   take_m512(v2);
  39 }
  40
  41 // CHECK: define {{(dso_local )?}}void @use_vectors()
  42 // AVX: call {{(x86_64_sysvcc )?}}<8 x float> @get_m256()
  43 // AVX: call {{(x86_64_sysvcc )?}}void @take_m256(<8 x float> noundef %{{.*}})
  44 // AVX: call {{(x86_64_sysvcc )?}}<16 x float> @get_m512()
  45 // AVX: call {{(x86_64_sysvcc )?}}void @take_m512(<16 x float> noundef %{{.*}})
  46 // NOAVX: call {{(x86_64_sysvcc )?}}<8 x float> @get_m256()
  47 // NOAVX: call {{(x86_64_sysvcc )?}}void @take_m256(ptr noundef byval(<8 x float>) align 32 %{{.*}})
  48 // NOAVX: call {{(x86_64_sysvcc )?}}<16 x float> @get_m512()
  49 // NOAVX: call {{(x86_64_sysvcc )?}}void @take_m512(ptr noundef byval(<16 x float>) align 64 %{{.*}})