arm-asm-warn.c revision 221a8908e4521de533bace49566b5281df9b1924 
1// REQUIRES: arm-registered-target
2// RUN: %clang_cc1 -triple armv7 %s -emit-llvm -o /dev/null
3
4char bar();
5
6void t1(int x, char y) {
7  __asm__ volatile("mcr p15, 0, %1, c9, c12, 5;"
8                   "mrc p15, 0, %0, c9, c13, 2;"
9                   : "=r" (x)
10                   : "r" (bar())); // no warning
11  __asm__ volatile("foo %0, %1"
12                   : "+r" (x),
13                     "+r" (y)
14                   :);
15  __asm__ volatile("ldrb %0, [%1]" : "=r" (y) : "r" (x)); // no warning
16}
17
18// <rdar://problem/12284092>
19typedef __attribute__((neon_vector_type(2))) long long int64x2_t;
20typedef struct int64x2x4_t {
21  int64x2_t val[4];
22} int64x2x4_t;
23int64x2x4_t t2(const long long a[]) {
24  int64x2x4_t r;
25  __asm__("vldm %[a], { %q[r0], %q[r1], %q[r2], %q[r3] }"
26          : [r0] "=r"(r.val[0]), // expected-warning {{the value is truncated when put into register, use a modifier to specify the size}}
27            [r1] "=r"(r.val[1]), // expected-warning {{the value is truncated when put into register, use a modifier to specify the size}}
28            [r2] "=r"(r.val[2]), // expected-warning {{the value is truncated when put into register, use a modifier to specify the size}}
29            [r3] "=r"(r.val[3])  // expected-warning {{the value is truncated when put into register, use a modifier to specify the size}}
30          : [a] "r"(a));
31  return r;
32}
33