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| author | Ian Lance Taylor <iant@golang.org> | 2020-12-21 16:17:23 -0800 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2020-12-21 16:18:02 -0800 |
| commit | 03ea48ff27fd40b04b148f7006a02513a887ad0d (patch) | |
| tree | 826967960387c901560432d71b56586654671f97 /gcc/go/go-lang.c | |
| parent | 1a5e728a544e216fc222f61bcc602b0aadd56eb9 (diff) | |
| download | gcc-03ea48ff27fd40b04b148f7006a02513a887ad0d.zip gcc-03ea48ff27fd40b04b148f7006a02513a887ad0d.tar.gz gcc-03ea48ff27fd40b04b148f7006a02513a887ad0d.tar.bz2 | |
Go frontend: ensure mpfr exponent range is large enough for Go
PR go/98402
* go-lang.c (go_langhook_init): Force MPFR exponent range to be
large enough to support Go constants.
Diffstat (limited to 'gcc/go/go-lang.c')
| -rw-r--r-- | gcc/go/go-lang.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/go/go-lang.c b/gcc/go/go-lang.c index 08c1f38..9c0e7af 100644 --- a/gcc/go/go-lang.c +++ b/gcc/go/go-lang.c @@ -131,6 +131,16 @@ go_langhook_init (void) eventually be controllable by a command line option. */ mpfr_set_default_prec (256); + /* If necessary, override GCC's choice of minimum and maximum + exponents. This should only affect GCC middle-end + compilation-time, not correctness. */ + mpfr_exp_t exp = mpfr_get_emax (); + if (exp < (1 << 16) - 1) + mpfr_set_emax ((1 << 16) - 1); + exp = mpfr_get_emin (); + if (exp > - ((1 << 16) - 1)) + mpfr_set_emin (- ((1 << 16) - 1)); + /* Go uses exceptions. */ using_eh_for_cleanups (); |