llvm-project/clang/test/Sema/altivec-init.c

// RUN: %clang_cc1 %s -triple=powerpc-apple-darwin8 -target-feature +altivec -verify -pedantic -fsyntax-only

typedef int v4 __attribute((vector_size(16)));
typedef short v8 __attribute((vector_size(16)));

v8 foo(void) { 
  v8 a;
  v4 b;
  a = (v8){4, 2};
  b = (v4)(5, 6, 7, 8, 9); // expected-warning {{excess elements in vector initializer}}
  b = (v4)(5, 6, 8, 8.0f);

  vector int vi;
  vi = (vector int)(1);
  vi = (vector int)(1, 2);          // expected-error {{number of elements must be either one or match the size of the vector}}
  vi = (vector int)(1, 2, 3, 4);
  vi = (vector int)(1, 2, 3, 4, 5); // expected-warning {{excess elements in vector initializer}}
  vi = (vector int){1};
  vi = (vector int){1, 2};
  vi = (vector int){1, 2, 3, 4, 5}; // expected-warning {{excess elements in vector initializer}}
  vector float vf;
  vf = (vector float)(1.0);

  return (v8){0, 1, 2, 3, 1, 2, 3, 4};

  // FIXME: test that (type)(fn)(args) still works with -maltivec
  // FIXME: test that c++ overloaded commas still work -maltivec
}

void __attribute__((__overloadable__)) f(v4 a)
{
}

void __attribute__((__overloadable__)) f(int a)
{
}

void test()
{
  v4 vGCC;
  vector int vAltiVec;

  f(vAltiVec);
  vGCC = vAltiVec;
  int res = vGCC > vAltiVec;
  vAltiVec = 0 ? vGCC : vGCC;
}

typedef struct VecMem {
  vector signed vec;
} VecMem;

// The following should not assert.  See qiongsiwu1's comment here: 
// https://reviews.llvm.org/D115670
void test2() {
  vector signed local_vec = {1, 2, 3, 4};
  VecMem VM;
  VM.vec = ++local_vec;
}