1*2b5f68a5SSirraide // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++23 %s -emit-llvm -o - | FileCheck %s
2*2b5f68a5SSirraide // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++23 -fno-assumptions %s -emit-llvm -o - | FileCheck %s --check-prefix=DISABLED
3*2b5f68a5SSirraide
4*2b5f68a5SSirraide // DISABLED-NOT: @llvm.assume
5*2b5f68a5SSirraide
6*2b5f68a5SSirraide bool f();
7*2b5f68a5SSirraide
8*2b5f68a5SSirraide template <typename T>
f2()9*2b5f68a5SSirraide void f2() {
10*2b5f68a5SSirraide [[assume(sizeof(T) == sizeof(int))]];
11*2b5f68a5SSirraide }
12*2b5f68a5SSirraide
13*2b5f68a5SSirraide // CHECK: @_Z1gii(i32 noundef [[X:%.*]], i32 noundef [[Y:%.*]])
14*2b5f68a5SSirraide // CHECK-NEXT: entry:
15*2b5f68a5SSirraide // CHECK-NEXT: [[X_ADDR:%.*]] = alloca i32
16*2b5f68a5SSirraide // CHECK-NEXT: [[Y_ADDR:%.*]] = alloca i32
17*2b5f68a5SSirraide // CHECK-NEXT: store i32 [[X]], ptr [[X_ADDR]]
18*2b5f68a5SSirraide // CHECK-NEXT: store i32 [[Y]], ptr [[Y_ADDR]]
g(int x,int y)19*2b5f68a5SSirraide void g(int x, int y) {
20*2b5f68a5SSirraide // Not emitted because it has side-effects.
21*2b5f68a5SSirraide [[assume(f())]];
22*2b5f68a5SSirraide
23*2b5f68a5SSirraide // CHECK-NEXT: call void @llvm.assume(i1 true)
24*2b5f68a5SSirraide [[assume((1, 2))]];
25*2b5f68a5SSirraide
26*2b5f68a5SSirraide // CHECK-NEXT: [[X1:%.*]] = load i32, ptr [[X_ADDR]]
27*2b5f68a5SSirraide // CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[X1]], 27
28*2b5f68a5SSirraide // CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
29*2b5f68a5SSirraide [[assume(x != 27)]];
30*2b5f68a5SSirraide
31*2b5f68a5SSirraide // CHECK-NEXT: [[X2:%.*]] = load i32, ptr [[X_ADDR]]
32*2b5f68a5SSirraide // CHECK-NEXT: [[Y2:%.*]] = load i32, ptr [[Y_ADDR]]
33*2b5f68a5SSirraide // CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[X2]], [[Y2]]
34*2b5f68a5SSirraide // CHECK-NEXT: call void @llvm.assume(i1 [[CMP2]])
35*2b5f68a5SSirraide [[assume(x == y)]];
36*2b5f68a5SSirraide
37*2b5f68a5SSirraide // CHECK-NEXT: call void @_Z2f2IiEvv()
38*2b5f68a5SSirraide f2<int>();
39*2b5f68a5SSirraide
40*2b5f68a5SSirraide // CHECK-NEXT: call void @_Z2f2IdEvv()
41*2b5f68a5SSirraide f2<double>();
42*2b5f68a5SSirraide }
43*2b5f68a5SSirraide
44*2b5f68a5SSirraide // CHECK: void @_Z2f2IiEvv()
45*2b5f68a5SSirraide // CHECK-NEXT: entry:
46*2b5f68a5SSirraide // CHECK-NEXT: call void @llvm.assume(i1 true)
47*2b5f68a5SSirraide
48*2b5f68a5SSirraide // CHECK: void @_Z2f2IdEvv()
49*2b5f68a5SSirraide // CHECK-NEXT: entry:
50*2b5f68a5SSirraide // CHECK-NEXT: call void @llvm.assume(i1 false)
51