Viewing file:  asm-x86-1.c (1.4 KB) -rw-r--r--
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/* { dg-do compile { target x86_64-*-* } } */
#include "analyzer-decls.h"
int test_out (void)
{
int dst_a, dst_b;
asm ("mov 42, %0"
: "=r" (dst_a));
asm ("mov 42, %0"
: "=r" (dst_b));
__analyzer_eval (dst_a == dst_b); /* { dg-warning "TRUE" } */
return dst_a;
}
int test_out_in (int src_a)
{
int dst_a, dst_b;
asm ("mov %1, %0"
: "=r" (dst_a)
: "r" (src_a));
asm ("mov %1, %0"
: "=r" (dst_b)
: "r" (src_a));
__analyzer_eval (dst_a == dst_b); /* { dg-warning "TRUE" } */
return dst_a;
}
int test_out_in_in (int src_a, int src_b)
{
int dst_a, dst_b;
asm ("mov %1, %0;\n"
"add %2, %0"
: "=r" (dst_a)
: "r" (src_a),
"r" (src_b));
asm ("mov %1, %0;\n"
"add %2, %0"
: "=r" (dst_b)
: "r" (src_a),
"r" (src_b));
__analyzer_eval (dst_a == dst_b); /* { dg-warning "TRUE" } */
return dst_a;
}
void test_inout_1 (int v)
{
int saved = v;
int result_a, result_b;
asm ("dec %0"
: "+r" (v));
result_a = v;
asm ("dec %0"
: "+r" (v));
result_b = v;
__analyzer_eval (v == saved); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (v == result_a); /* { dg-warning "UNKNOWN" } */
__analyzer_eval (v == result_b); /* { dg-warning "TRUE" } */
}
void test_inout_2 (void)
{
int v;
int result_a, result_b;
asm ("dec %0" /* { dg-warning "use of uninitialized value 'v'" } */
: "+r" (v));
}
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