x86_32-inline-asm.c revision 5ece32e3359ca34fcdab07829f5e9fdbfd157f78 
1// RUN: %clang_cc1 -triple i386-apple-darwin9 -verify %s
2// <rdar://problem/12415959>
3
4typedef unsigned int u_int32_t;
5typedef u_int32_t uint32_t;
6
7typedef unsigned long long u_int64_t;
8typedef u_int64_t uint64_t;
9
10struct S;
11
12int func(struct S *s) {
13  // Error out if size is > 32-bits.
14  uint32_t msr = 0x8b;
15  uint64_t val = 0;
16  __asm__ volatile("wrmsr"
17                   :
18                   : "c" (msr),
19                     "a" ((val & 0xFFFFFFFFUL)), // expected-error {{invalid input size for constraint 'a'}}
20                     "d" (((val >> 32) & 0xFFFFFFFFUL)));
21
22  // Don't error out if the size of the destination is <= 32 bits.
23  unsigned char data;
24  unsigned int port;
25  __asm__ volatile("outb %0, %w1" : : "a" (data), "Nd" (port)); // No error expected.
26
27  // Don't error out for incomplete types.
28  __asm(""::"a"(*s));  // No error expected.
29}
30