clang/test/CodeGen/AArch64/fmv-resolver-emission.c

   1 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -emit-llvm -o - %s | FileCheck %s
   2
   3 // CHECK: @used_before_default_def = weak_odr ifunc void (), ptr @used_before_default_def.resolver
   4 // CHECK: @used_after_default_def = weak_odr ifunc void (), ptr @used_after_default_def.resolver
   5 // CHECK-NOT: @used_before_default_decl = weak_odr ifunc void (), ptr @used_before_default_decl.resolver
   6 // CHECK-NOT: @used_after_default_decl = weak_odr ifunc void (), ptr @used_after_default_decl.resolver
   7 // CHECK-NOT: @used_no_default = weak_odr ifunc void (), ptr @used_no_default.resolver
   8 // CHECK-NOT: @not_used_no_default = weak_odr ifunc void (), ptr @not_used_no_default.resolver
   9 // CHECK: @not_used_with_default = weak_odr ifunc void (), ptr @not_used_with_default.resolver
  10
  11
  12 // Test that an ifunc is generated and used when the default
  13 // version is defined after the first use of the function.
  14 //
  15 __attribute__((target_version("aes"))) void used_before_default_def(void) {}
  16 // CHECK-LABEL: define dso_local void @used_before_default_def._Maes(
  17 //
  18 void call_before_def(void) { used_before_default_def(); }
  19 // CHECK-LABEL: define dso_local void @call_before_def(
  20 // CHECK: call void @used_before_default_def()
  21 //
  22 __attribute__((target_version("default"))) void used_before_default_def(void) {}
  23 // CHECK-LABEL: define dso_local void @used_before_default_def.default(
  24 //
  25 // CHECK-NOT: declare void @used_before_default_def(
  26
  27
  28 // Test that an ifunc is generated and used when the default
  29 // version is defined before the first use of the function.
  30 //
  31 __attribute__((target_version("aes"))) void used_after_default_def(void) {}
  32 // CHECK-LABEL: define dso_local void @used_after_default_def._Maes(
  33 //
  34 __attribute__((target_version("default"))) void used_after_default_def(void) {}
  35 // CHECK-LABEL: define dso_local void @used_after_default_def.default(
  36 //
  37 void call_after_def(void) { used_after_default_def(); }
  38 // CHECK-LABEL: define dso_local void @call_after_def(
  39 // CHECK: call void @used_after_default_def()
  40 //
  41 // CHECK-NOT: declare void @used_after_default_def(
  42
  43
  44 // Test that an unmagled declaration is generated and used when the
  45 // default version is declared after the first use of the function.
  46 //
  47 __attribute__((target_version("aes"))) void used_before_default_decl(void) {}
  48 // CHECK-LABEL: define dso_local void @used_before_default_decl._Maes(
  49 //
  50 void call_before_decl(void) { used_before_default_decl(); }
  51 // CHECK-LABEL: define dso_local void @call_before_decl(
  52 // CHECK: call void @used_before_default_decl()
  53 //
  54 __attribute__((target_version("default"))) void used_before_default_decl(void);
  55 // CHECK: declare void @used_before_default_decl()
  56
  57
  58 // Test that an unmagled declaration is generated and used when the
  59 // default version is declared before the first use of the function.
  60 //
  61 __attribute__((target_version("aes"))) void used_after_default_decl(void) {}
  62 // CHECK-LABEL: define dso_local void @used_after_default_decl._Maes(
  63 //
  64 __attribute__((target_version("default"))) void used_after_default_decl(void);
  65 // CHECK: declare void @used_after_default_decl()
  66 //
  67 void call_after_decl(void) { used_after_default_decl(); }
  68 // CHECK-LABEL: define dso_local void @call_after_decl(
  69 // CHECK: call void @used_after_default_decl()
  70
  71
  72 // Test that an unmagled declaration is generated and used when
  73 // the default version is not present.
  74 //
  75 __attribute__((target_version("aes"))) void used_no_default(void) {}
  76 // CHECK-LABEL: define dso_local void @used_no_default._Maes(
  77 //
  78 void call_no_default(void) { used_no_default(); }
  79 // CHECK-LABEL: define dso_local void @call_no_default(
  80 // CHECK: call void @used_no_default()
  81 //
  82 // CHECK: declare void @used_no_default()
  83
  84
  85 // Test that neither an ifunc nor a declaration is generated if the default
  86 // definition is missing since the versioned function is not used.
  87 //
  88 __attribute__((target_version("aes"))) void not_used_no_default(void) {}
  89 // CHECK-LABEL: define dso_local void @not_used_no_default._Maes(
  90 //
  91 // CHECK-NOT: declare void @not_used_no_default(
  92
  93
  94 // Test that an ifunc is generated if the default version is defined but not used.
  95 //
  96 __attribute__((target_version("aes"))) void not_used_with_default(void) {}
  97 // CHECK-LABEL: define dso_local void @not_used_with_default._Maes(
  98 //
  99 __attribute__((target_version("default"))) void not_used_with_default(void) {}
 100 // CHECK-LABEL: define dso_local void @not_used_with_default.default(
 101 //
 102 // CHECK-NOT: declare void @not_used_with_default(
 103
 104
 105 // CHECK: define weak_odr ptr @used_before_default_def.resolver()
 106 // CHECK: define weak_odr ptr @used_after_default_def.resolver()
 107 // CHECK-NOT: define weak_odr ptr @used_before_default_decl.resolver(
 108 // CHECK-NOT: define weak_odr ptr @used_after_default_decl.resolver(
 109 // CHECK-NOT: define weak_odr ptr @used_no_default.resolver(
 110 // CHECK-NOT: define weak_odr ptr @not_used_no_default.resolver(
 111 // CHECK: define weak_odr ptr @not_used_with_default.resolver()