http://llvm.org/bugs/show_bug.cgi?id=3385
Summary: clang rejects input constraint 'er' in asm
Product: clang
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Semantic Analyzer
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
This comes from linux-2.6.28.1:
$ cat /tmp/bug27.c
typedef struct {
long counter;
} atomic64_t;
inline void atomic64_sub(long i, atomic64_t *v)
{
asm volatile("subq %1,%0"
: "=m" (v->counter)
: "er" (i), "m" (v->counter));
}
$ gcc -c -W -Wall /tmp/bug27.
$ icc -c -Wall /tmp/bug27.c
$ clang /tmp/bug27.c
/tmp/bug27.c:9:24: error: invalid input constraint 'er' in asm
: "er" (i), "m" (v->counter));
^
1 diagnostic generated.
$
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