On 7/17/23 03:17, senthilkumar.selva...@microchip.com wrote:
On Fri, 2023-07-14 at 09:29 -0400, Vladimir Makarov wrote:
If you send me the preprocessed test, I could start to work on it to fix
the problems. I think it is hard to fix them right for a person having
a little experience with LRA.
Ok, this is a reduced test case that reproduces the failure.
$ cat case.c
typedef int HItype __attribute__ ((mode (HI)));
HItype
__mulvhi3 (HItype a, HItype b)
{
HItype w;
if (__builtin_mul_overflow (a, b, &w))
__builtin_trap ();
return w;
}
On latest master, this trivial patch turns on LRA for avr
--- gcc/config/avr/avr.cc
+++ gcc/config/avr/avr.cc
@@ -15244,9 +15244,6 @@ avr_float_lib_compare_returns_bool (machine_mode mode,
enum rtx_code)
#undef TARGET_CONVERT_TO_TYPE
#define TARGET_CONVERT_TO_TYPE avr_convert_to_type
-#undef TARGET_LRA_P
-#define TARGET_LRA_P hook_bool_void_false
-
#undef TARGET_ADDR_SPACE_SUBSET_P
#define TARGET_ADDR_SPACE_SUBSET_P avr_addr_space_subset_p
Then configuring and building for avr without attempting to build libgcc
$ configure --target=avr --prefix=<prefix_dir> --enable-languages=c && make all-host
&& make install-host
And finally to reproduce the failure
$ <prefix_dir>/bin/avr-gcc -mmcu=avr25 case.c -Os
Thank you. I've reproduced the bug and started to work on it
yesterday. The problem is a bit tricky than I initially thought but I
believe I'll fix it on this week.
