File: uninit-variables-vectors.c

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (17 lines) | stat: -rw-r--r-- 988 bytes parent folder | download | duplicates (32) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
// RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fsyntax-only -Wuninitialized -fsyntax-only %s -verify

typedef int __v4si __attribute__((__vector_size__(16)));
typedef float __m128 __attribute__((__vector_size__(16)));
__m128 _mm_xor_ps(__m128 a, __m128 b);
__m128 _mm_loadu_ps(const float *p);

void test1(float *input) {
  __m128 x, y, z, w, X; // expected-note {{variable 'x' is declared here}} expected-note {{variable 'y' is declared here}} expected-note {{variable 'w' is declared here}}  expected-note {{variable 'z' is declared here}}
  x = _mm_xor_ps(x,x); // expected-warning {{variable 'x' is uninitialized when used here}}
  y = _mm_xor_ps(y,y); // expected-warning {{variable 'y' is uninitialized when used here}}
  z = _mm_xor_ps(z,z); // expected-warning {{variable 'z' is uninitialized when used here}}
  w = _mm_xor_ps(w,w); // expected-warning {{variable 'w' is uninitialized when used here}}
  X = _mm_loadu_ps(&input[0]);
  X = _mm_xor_ps(X,X); // no-warning
}