clang/test/CodeGenCXX/attr-x86-no_caller_saved_registers.cpp

   1 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu %s -emit-llvm -o - | FileCheck %s
   2 // RUN: %clang_cc1 -triple x86_64-pc-win32 %s -emit-llvm -o - | FileCheck %s
   3
   4 // CHECK: foo{{[^#]*}}#[[ATTRS:[0-9]+]]
   5 __attribute__((no_caller_saved_registers)) void foo() {}
   6 namespace S {
   7 // CHECK: bar{{[^#]*}}#[[ATTRS]]
   8 __attribute__((no_caller_saved_registers)) void bar(int *a) { foo(); }
   9 }
  10
  11 struct St {
  12   static void baz(int *a) __attribute__((no_caller_saved_registers)) { S::bar(a); }
  13 };
  14
  15 __attribute((no_caller_saved_registers)) void (*foobar)(void);
  16
  17 // CHECK-LABEL: @main
  18 int main(int argc, char **argv) {
  19   St::baz(&argc);
  20   // CHECK: [[FOOBAR:%.+]] = load ptr, ptr @{{.*}}foobar{{.*}},
  21   // CHECK-NEXT: call void [[FOOBAR]]() #[[ATTRS1:.+]]
  22   foobar();
  23   return 0;
  24 }
  25
  26 // CHECK: baz{{[^#]*}}#[[ATTRS]]
  27
  28 // CHECK: attributes #[[ATTRS]] = {
  29 // CHECK-SAME: "no_caller_saved_registers"
  30 // CHECK-SAME: }
  31 // CHECK: attributes #[[ATTRS1]] = { "no_caller_saved_registers" }