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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++23 %s -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++23 -fno-assumptions %s -emit-llvm -o - | FileCheck %s --check-prefix=DISABLED
// DISABLED-NOT: @llvm.assume
bool f();
template <typename T>
void f2() {
[[assume(sizeof(T) == sizeof(int))]];
}
// CHECK: @_Z1gii(i32 noundef [[X:%.*]], i32 noundef [[Y:%.*]])
// CHECK-NEXT: entry:
// CHECK-NEXT: [[X_ADDR:%.*]] = alloca i32
// CHECK-NEXT: [[Y_ADDR:%.*]] = alloca i32
// CHECK-NEXT: store i32 [[X]], ptr [[X_ADDR]]
// CHECK-NEXT: store i32 [[Y]], ptr [[Y_ADDR]]
void g(int x, int y) {
// Not emitted because it has side-effects.
[[assume(f())]];
// CHECK-NEXT: call void @llvm.assume(i1 true)
[[assume((1, 2))]];
// CHECK-NEXT: [[X1:%.*]] = load i32, ptr [[X_ADDR]]
// CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[X1]], 27
// CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
[[assume(x != 27)]];
// CHECK-NEXT: [[X2:%.*]] = load i32, ptr [[X_ADDR]]
// CHECK-NEXT: [[Y2:%.*]] = load i32, ptr [[Y_ADDR]]
// CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[X2]], [[Y2]]
// CHECK-NEXT: call void @llvm.assume(i1 [[CMP2]])
[[assume(x == y)]];
// CHECK-NEXT: call void @_Z2f2IiEvv()
f2<int>();
// CHECK-NEXT: call void @_Z2f2IdEvv()
f2<double>();
}
// CHECK: void @_Z2f2IiEvv()
// CHECK-NEXT: entry:
// CHECK-NEXT: call void @llvm.assume(i1 true)
// CHECK: void @_Z2f2IdEvv()
// CHECK-NEXT: entry:
// CHECK-NEXT: call void @llvm.assume(i1 false)
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