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Implement __builtin_choose_expr

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Follows GCC implementation.
This commit is contained in:
Michael Matz 2016-07-13 15:11:40 +02:00
parent 10e4db45dc
commit 8a1a2a6033
3 changed files with 43 additions and 0 deletions
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29
tccgen.c
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@ -4238,6 +4238,35 @@ ST_FUNC void unary(void)
vpushi(is_compatible_types(&type1, &type2));
}
break;
case TOK_builtin_choose_expr:
{
int saved_nocode_wanted, c;
next();
skip('(');
c = expr_const();
skip(',');
if (!c) {
saved_nocode_wanted = nocode_wanted;
nocode_wanted = 1;
}
expr_eq();
if (!c) {
vpop();
nocode_wanted = saved_nocode_wanted;
}
skip(',');
if (c) {
saved_nocode_wanted = nocode_wanted;
nocode_wanted = 1;
}
expr_eq();
if (c) {
vpop();
nocode_wanted = saved_nocode_wanted;
}
skip(')');
}
break;
case TOK_builtin_constant_p:
{
int saved_nocode_wanted, res;

1
tcctok.h
View File

@ -132,6 +132,7 @@
DEF(TOK_VISIBILITY1, "visibility")
DEF(TOK_VISIBILITY2, "__visibility__")
DEF(TOK_builtin_types_compatible_p, "__builtin_types_compatible_p")
DEF(TOK_builtin_choose_expr, "__builtin_choose_expr")
DEF(TOK_builtin_constant_p, "__builtin_constant_p")
DEF(TOK_builtin_frame_address, "__builtin_frame_address")
DEF(TOK_builtin_return_address, "__builtin_return_address")

13
tests/tcctest.c
View File

@ -2685,6 +2685,9 @@ int constant_p_var;
void builtin_test(void)
{
short s;
int i;
long long ll;
#if GCC_MAJOR >= 3
COMPAT_TYPE(int, int);
COMPAT_TYPE(int, unsigned int);
@ -2704,6 +2707,16 @@ void builtin_test(void)
printf("res = %d\n", __builtin_constant_p(1 + 2));
printf("res = %d\n", __builtin_constant_p(&constant_p_var));
printf("res = %d\n", __builtin_constant_p(constant_p_var));
s = 1;
ll = 2;
i = __builtin_choose_expr (1 != 0, ll, s);
printf("bce: %d\n", i);
i = __builtin_choose_expr (1 != 1, ll, s);
printf("bce: %d\n", i);
i = sizeof (__builtin_choose_expr (1, ll, s));
printf("bce: %d\n", i);
i = sizeof (__builtin_choose_expr (0, ll, s));
printf("bce: %d\n", i);
}
#ifndef _WIN32