clang/test/CodeGen/attr-retain.c

   1 // RUN: %clang_cc1 -emit-llvm -triple x86_64 %s -o - | FileCheck %s
   2
   3 /// Set !retain regardless of the target. The backend will lower !retain to
   4 /// SHF_GNU_RETAIN on ELF and ignore the metadata for other binary formats.
   5 // CHECK:      @c0 ={{.*}} constant i32 {{.*}}
   6 // CHECK:      @foo.l0 = internal global i32 {{.*}}
   7 // CHECK:      @g0 ={{.*}} global i32 {{.*}}
   8 // CHECK-NEXT: @g1 ={{.*}} global i32 {{.*}}
   9 // CHECK-NEXT: @g3 = internal global i32 {{.*}}
  10 // CHECK-NEXT: @g4 = internal global i32 0, section ".data.g"{{.*}}
  11
  12 // CHECK:      @llvm.used = appending global [8 x ptr] [ptr @c0, ptr @foo.l0, ptr @f0, ptr @f2, ptr @g0, ptr @g1, ptr @g3, ptr @g4], section "llvm.metadata"
  13 // CHECK:      @llvm.compiler.used = appending global [3 x ptr] [ptr @f2, ptr @g3, ptr @g4], section "llvm.metadata"
  14
  15 const int c0 __attribute__((retain)) = 42;
  16
  17 void foo(void) {
  18   static int l0 __attribute__((retain)) = 2;
  19 }
  20
  21 __attribute__((retain)) int g0;
  22 int g1 __attribute__((retain));
  23 __attribute__((retain)) static int g2;
  24 __attribute__((used, retain)) static int g3;
  25 __attribute__((used, retain, section(".data.g"))) static int g4;
  26
  27 void __attribute__((retain)) f0(void) {}
  28 static void __attribute__((retain)) f1(void) {}
  29 static void __attribute__((used, retain)) f2(void) {}