clang/test/CXX/drs/cwg658.cpp

   1 // RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
   2 // RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
   3 // RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
   4 // RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
   5 // RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
   6 // RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
   7 // RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
   8
   9 namespace cwg658 { // cwg658: 2.7
  10
  11 void f(int* p1) {
  12   char* p2 = reinterpret_cast<char*>(p1);
  13 }
  14
  15 } // namespace cwg658
  16
  17 // We're checking that p1 is stored into p2 without changes.
  18
  19 // CHECK-LABEL: define {{.*}} void @cwg658::f(int*)(ptr noundef %p1)
  20 // CHECK:         [[P1_ADDR:%.+]] = alloca ptr, align 8
  21 // CHECK-NEXT:    [[P2:%.+]] = alloca ptr, align 8
  22 // CHECK:         store ptr %p1, ptr [[P1_ADDR]]
  23 // CHECK-NEXT:    [[TEMP:%.+]] = load ptr, ptr [[P1_ADDR]]
  24 // CHECK-NEXT:    store ptr [[TEMP]], ptr [[P2]]
  25 // CHECK-LABEL: }