operator-new.cpp   [plain text]

// RUN: %clang_cc1 -triple i686-pc-linux-gnu -emit-llvm -o %t-1.ll %s
// RUN: FileCheck -check-prefix SANE --input-file=%t-1.ll %s
// RUN: %clang_cc1 -triple i686-pc-linux-gnu -emit-llvm -fno-assume-sane-operator-new -o %t-2.ll %s
// RUN: FileCheck -check-prefix SANENOT --input-file=%t-2.ll %s


class teste {
  int A;
public:
  teste() : A(2) {}
};

void f1() {
  // SANE: declare noalias i8* @_Znwj(
  // SANENOT: declare i8* @_Znwj(
  new teste();
}


// rdar://5739832 - operator new should check for overflow in multiply.
void *f2(long N) {
  return new int[N];
  
// SANE:      [[UWO:%.*]] = call {{.*}} @llvm.umul.with.overflow
// SANE-NEXT: [[OVER:%.*]] = extractvalue {{.*}} [[UWO]], 1
// SANE-NEXT: [[SUM:%.*]] = extractvalue {{.*}} [[UWO]], 0
// SANE-NEXT: [[RESULT:%.*]] = select i1 [[OVER]], i32 -1, i32 [[SUM]]
// SANE-NEXT: call noalias i8* @_Znaj(i32 [[RESULT]])
}