[Bug tree-optimization/88753] Wrong code since r265463 in tree switch conversion
marxin at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Tue Jan 8 11:41:00 GMT 2019
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88753
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
$ cat zip.c
typedef unsigned short int uint16_t;
typedef unsigned char uint8_t;
uint16_t length;
uint16_t enc_method_global;
uint8_t
__attribute__((noipa))
_zip_buffer_get_8(int buffer)
{
return buffer;
}
int
__attribute__((noipa))
foo(int v)
{
uint16_t enc_method;
switch (_zip_buffer_get_8(v)) {
case 1:
enc_method = 0x0101;
break;
case 2:
enc_method = 0x0102;
break;
case 3:
enc_method = 0x0103;
break;
default:
__builtin_abort ();
}
enc_method_global = enc_method;
}
int main(int argc, char **argv)
{
foo (1);
if (enc_method_global != 0x0101)
__builtin_abort ();
return 0;
}
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