clang/test/PCH/pragma-optimize.c

   1 // Test this without pch.
   2 // RUN: %clang_cc1 %s -include %s -verify -fsyntax-only
   3
   4 // Test with pch.
   5 // RUN: %clang_cc1 %s -emit-pch -o %t
   6 // RUN: %clang_cc1 %s -emit-llvm -include-pch %t -o - | FileCheck %s
   7
   8 // The first run line creates a pch, and since at that point HEADER is not
   9 // defined, the only thing contained in the pch is the pragma. The second line
  10 // then includes that pch, so HEADER is defined and the actual code is compiled.
  11 // The check then makes sure that the pragma is in effect in the file that
  12 // includes the pch.
  13
  14 // expected-no-diagnostics
  15
  16 #ifndef HEADER
  17 #define HEADER
  18 #pragma clang optimize off
  19
  20 #else
  21
  22 int a;
  23
  24 void f(void) {
  25   a = 12345;
  26 }
  27
  28 // Check that the function is decorated with optnone
  29
  30 // CHECK-DAG: @f() [[ATTRF:#[0-9]+]]
  31 // CHECK-DAG: attributes [[ATTRF]] = { {{.*}}noinline{{.*}}optnone{{.*}} }
  32
  33 #endif