clang/test/CodeGenCXX/operator-new.cpp

   1 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -emit-llvm -o %t-1.ll %s
   2 // RUN: FileCheck --check-prefix=ALL -check-prefix SANE --input-file=%t-1.ll %s
   3 // RUN: %clang_cc1 -triple i686-pc-linux-gnu -emit-llvm -fno-assume-sane-operator-new -o %t-2.ll %s
   4 // RUN: FileCheck --check-prefix=ALL -check-prefix SANENOT --input-file=%t-2.ll %s
   5
   6 class teste {
   7   int A;
   8 public:
   9   teste() : A(2) {}
  10 };
  11
  12 void f1() {
  13   // ALL: declare noundef nonnull ptr @_Znwj(
  14   new teste();
  15 }
  16
  17 // operator new should check for overflow in multiply.
  18 void *f2(long N) {
  19   return new int[N];
  20
  21   // ALL:      [[UWO:%.*]] = call {{.*}} @llvm.umul.with.overflow
  22   // ALL-NEXT: [[OVER:%.*]] = extractvalue {{.*}} [[UWO]], 1
  23   // ALL-NEXT: [[SUM:%.*]] = extractvalue {{.*}} [[UWO]], 0
  24   // ALL-NEXT: [[RESULT:%.*]] = select i1 [[OVER]], i32 -1, i32 [[SUM]]
  25   // SANE-NEXT: call noalias noundef nonnull ptr @_Znaj(i32 noundef [[RESULT]])
  26   // SANENOT-NEXT: call noundef nonnull ptr @_Znaj(i32 noundef [[RESULT]])
  27 }
  28
  29 // ALL: declare noundef nonnull ptr @_Znaj(