clang/test/CodeGen/arithmetic-fence-builtin.cpp

   1 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -mreassociate  -o - %s \
   2 // RUN: | FileCheck --check-prefix CHECK %s
   3
   4 // RUN: %clang_cc1 -triple i386-pc-linux-gnu -emit-llvm -mreassociate  -o - %s \
   5 // RUN: | FileCheck --check-prefix CHECK %s
   6
   7 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -mreassociate \
   8 // RUN: -fprotect-parens -ffp-contract=on -o - %s \
   9 // RUN: | FileCheck --check-prefix CHECK %s
  10
  11 template <typename T> T addAF(T a, T b) {
  12   return __arithmetic_fence(a + b);
  13 }
  14
  15 int addit(float a, float b) {
  16   // CHECK-LABEL: define {{.*}} @{{.*}}additff(float {{.*}}, float {{.*}}) #0 {
  17   float af = addAF(a,b);
  18
  19   // CHECK: [[ADDR_A:%.*]] = alloca float, align 4
  20   // CHECK-NEXT: [[ADDR_B:%.*]] = alloca float, align 4
  21   // CHECK-NEXT: [[AF:%.*]] = alloca float, align 4
  22   // CHECK-NEXT: store float {{.*}}, ptr [[ADDR_A]], align 4
  23   // CHECK-NEXT: store float {{.*}}, ptr [[ADDR_B]], align 4
  24   // CHECK-NEXT: [[TEMP_A:%.*]] = load float, ptr [[ADDR_A]], align 4
  25   // CHECK-NEXT: [[TEMP_B:%.*]] = load float, ptr [[ADDR_B]], align 4
  26   // CHECK-NEXT: [[CALL2:%.*]] = call reassoc noundef float @_Z5addAFIfET_S0_S0_(float noundef [[TEMP_A]], float noundef [[TEMP_B]])
  27   // CHECK-NEXT:  store float [[CALL2]], ptr [[AF]], align 4
  28
  29   return 0;
  30   // CHECK-NEXT ret i32 0
  31 }
  32
  33   // CHECK-LABEL: define linkonce_odr noundef float @_Z5addAFIfET_S0_S0_(float noundef {{.*}}, float noundef {{.*}})
  34   // CHECK: [[A:%.*]] = alloca float, align 4
  35   // CHECK-NEXT: [[B:%.*]] = alloca float, align 4
  36   // CHECK-NEXT: store float {{.*}}, ptr [[A]], align 4
  37   // CHECK-NEXT: store float {{.*}}, ptr [[B]], align 4
  38   // CHECK-NEXT: [[Z1:%.*]] = load float, ptr [[A]], align 4
  39   // CHECK-NEXT: [[Z2:%.*]] = load float, ptr [[B]], align 4
  40   // CHECK-NEXT: [[ADD:%.*]] = fadd reassoc float [[Z1]], [[Z2]]
  41   // CHECK-NEXT: [[RES:%.*]] = call reassoc float @llvm.arithmetic.fence.f32(float [[ADD]])
  42   // CHECK: ret float [[RES]]