clang/test/CodeGen/builtin-cpu-supports.c

   1 // RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm < %s| FileCheck %s
   2
   3 // Test that we have the structure definition, the gep offsets, the name of the
   4 // global, the bit grab, and the icmp correct.
   5 extern void a(const char *);
   6
   7 // CHECK: @__cpu_model = external dso_local global { i32, i32, i32, [1 x i32] }
   8 // CHECK: @__cpu_features2 = external dso_local global [3 x i32]
   9
  10 int main(void) {
  11   __builtin_cpu_init();
  12
  13   // CHECK: call void @__cpu_indicator_init
  14
  15   if (__builtin_cpu_supports("sse4.2"))
  16     a("sse4.2");
  17
  18   // CHECK: [[LOAD:%[^ ]+]] = load i32, ptr getelementptr inbounds ({ i32, i32, i32, [1 x i32] }, ptr @__cpu_model, i32 0, i32 3, i32 0)
  19   // CHECK: [[AND:%[^ ]+]] = and i32 [[LOAD]], 256
  20   // CHECK: = icmp eq i32 [[AND]], 256
  21
  22   if (__builtin_cpu_supports("gfni"))
  23     a("gfni");
  24
  25   // CHECK: [[LOAD:%[^ ]+]] = load i32, ptr @__cpu_features2
  26   // CHECK: [[AND:%[^ ]+]] = and i32 [[LOAD]], 1
  27   // CHECK: = icmp eq i32 [[AND]], 1
  28
  29   return 0;
  30 }
  31
  32 // CHECK: declare dso_local void @__cpu_indicator_init()
  33
  34 // CHECK-LABEL: define{{.*}} @baseline(
  35 // CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 1)
  36 // CHECK-NEXT:    and i32 [[LOAD]], -2147483648
  37 int baseline() { return __builtin_cpu_supports("x86-64"); }
  38
  39 // CHECK-LABEL: define{{.*}} @v2(
  40 // CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 2)
  41 // CHECK-NEXT:    and i32 [[LOAD]], 1
  42 int v2() { return __builtin_cpu_supports("x86-64-v2"); }
  43
  44 // CHECK-LABEL: define{{.*}} @v3(
  45 // CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 2)
  46 // CHECK-NEXT:    and i32 [[LOAD]], 2
  47 int v3() { return __builtin_cpu_supports("x86-64-v3"); }
  48
  49 // CHECK-LABEL: define{{.*}} @v4(
  50 // CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 2)
  51 // CHECK-NEXT:    and i32 [[LOAD]], 4
  52 int v4() { return __builtin_cpu_supports("x86-64-v4"); }