clang/test/CodeGenCXX/clang-sections-tentative.c

   1 // RUN: %clang_cc1 -x c -emit-llvm -triple arm-none-eabi -o - %s | FileCheck %s
   2
   3 // Test that section attributes are attached to C tentative definitions as per
   4 // '#pragma clang section' directives.
   5
   6 #pragma clang section bss = ".bss.1"
   7 int x; // bss.1
   8
   9 #pragma clang section bss = ""
  10 int x; // stays in .bss.1
  11 int y; // not assigned a section attribute
  12 int z; // not assigned a section attribute
  13
  14 #pragma clang section bss = ".bss.2"
  15 int x; // stays in .bss.1
  16 int y; // .bss.2
  17
  18 // Test the same for `const` declarations.
  19 #pragma clang section rodata = ".rodata.1"
  20 const int cx; // rodata.1
  21
  22 #pragma clang section rodata = ""
  23 const int cx; // stays in .rodata.1
  24 const int cy; // not assigned a section attribute
  25 const int cz; // not assigned a rodata section attribute
  26
  27 #pragma clang section rodata = ".rodata.2"
  28 const int cx; // stays in .rodata.1
  29 const int cy; // .rodata.2
  30
  31 // CHECK: @x ={{.*}} global i32 0, align 4 #0
  32 // CHECK: @y ={{.*}} global i32 0, align 4 #1
  33 // CHECK: @z ={{.*}} global i32 0, align 4
  34 // CHECK: @cx ={{.*}} constant i32 0, align 4 #2
  35 // CHECK: @cy ={{.*}} constant i32 0, align 4 #3
  36 // CHECK: @cz ={{.*}} constant i32 0, align 4 #1
  37
  38 // CHECK: attributes #0 = { "bss-section"=".bss.1" }
  39 // CHECK: attributes #1 = { "bss-section"=".bss.2" }
  40 // CHECK: attributes #2 = { "bss-section"=".bss.2" "rodata-section"=".rodata.1" }
  41 // CHECK: attributes #3 = { "bss-section"=".bss.2" "rodata-section"=".rodata.2" }