llvm-project/clang/test/CodeGen/x86_32-inline-asm.c

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// RUN: %clang_cc1 -triple i386-apple-darwin9 -verify %s
// <rdar://problem/12415959>
typedef unsigned int u_int32_t;
typedef u_int32_t uint32_t;
typedef unsigned long long u_int64_t;
typedef u_int64_t uint64_t;
int func1() {
// Error out if size is > 32-bits.
uint32_t msr = 0x8b;
uint64_t val = 0;
__asm__ volatile("wrmsr"
:
: "c" (msr),
"a" ((val & 0xFFFFFFFFUL)), // expected-error {{invalid input size for constraint 'a'}}
"d" (((val >> 32) & 0xFFFFFFFFUL)));
// Don't error out if the size of the destination is <= 32 bits.
unsigned char data;
unsigned int port;
__asm__ volatile("outb %0, %w1" : : "a" (data), "Nd" (port)); // No error expected.
}