llvm-project/clang/test/Sema/ext_vector_conversions.c
Aaron Ballman 8c5edb59cf Use functions with prototypes when appropriate; NFC
A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,

  void func();

becomes

  void func(void);

This is the second batch of tests being updated (there are a significant
number of other tests left to be updated).
2022-02-04 15:20:36 -05:00

20 lines
842 B
C

// RUN: %clang_cc1 -triple x86_64-apple-macos10.7.0 -fsyntax-only -verify -Wconversion %s
typedef __attribute__((ext_vector_type(4))) char char4;
typedef __attribute__((ext_vector_type(4))) short short4;
typedef __attribute__((ext_vector_type(1))) float float1;
static void test(void) {
char4 vc4;
float f;
// Not allowed. There's no splatting conversion between float and int vector,
// and we don't want to bitcast f to vector-of-char (as would happen with the
// old-style vector types).
vc4 += f; // expected-error {{cannot convert between vector values of different size}}
short4 vs4;
long long ll;
// This one is OK; we don't re-interpret ll as short4, rather we splat its
// value, which should produce a warning about clamping.
vs4 += ll; // expected-warning {{implicit conversion loses integer precision}}
}