51 lines · cpp
1// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++23 %s -emit-llvm -o - | FileCheck %s2// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++23 -fno-assumptions %s -emit-llvm -o - | FileCheck %s --check-prefix=DISABLED3 4// DISABLED-NOT: @llvm.assume5 6bool f();7 8template <typename T>9void f2() {10 [[assume(sizeof(T) == sizeof(int))]];11}12 13// CHECK: @_Z1gii(i32 noundef [[X:%.*]], i32 noundef [[Y:%.*]])14// CHECK-NEXT: entry:15// CHECK-NEXT: [[X_ADDR:%.*]] = alloca i3216// CHECK-NEXT: [[Y_ADDR:%.*]] = alloca i3217// CHECK-NEXT: store i32 [[X]], ptr [[X_ADDR]]18// CHECK-NEXT: store i32 [[Y]], ptr [[Y_ADDR]]19void g(int x, int y) {20 // Not emitted because it has side-effects.21 [[assume(f())]];22 23 // CHECK-NEXT: call void @llvm.assume(i1 true)24 [[assume((1, 2))]];25 26 // CHECK-NEXT: [[X1:%.*]] = load i32, ptr [[X_ADDR]]27 // CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[X1]], 2728 // CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])29 [[assume(x != 27)]];30 31 // CHECK-NEXT: [[X2:%.*]] = load i32, ptr [[X_ADDR]]32 // CHECK-NEXT: [[Y2:%.*]] = load i32, ptr [[Y_ADDR]]33 // CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[X2]], [[Y2]]34 // CHECK-NEXT: call void @llvm.assume(i1 [[CMP2]])35 [[assume(x == y)]];36 37 // CHECK-NEXT: call void @_Z2f2IiEvv()38 f2<int>();39 40 // CHECK-NEXT: call void @_Z2f2IdEvv()41 f2<double>();42}43 44// CHECK: void @_Z2f2IiEvv()45// CHECK-NEXT: entry:46// CHECK-NEXT: call void @llvm.assume(i1 true)47 48// CHECK: void @_Z2f2IdEvv()49// CHECK-NEXT: entry:50// CHECK-NEXT: call void @llvm.assume(i1 false)51