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| author | Aldy Hernandez <aldyh@redhat.com> | 2022-09-17 10:17:13 +0200 |
|---|---|---|
| committer | Aldy Hernandez <aldyh@redhat.com> | 2022-09-20 07:15:53 +0200 |
| commit | 2b61ed838c7f3f4bf54d4530c0f053b420623beb (patch) | |
| tree | fe47a01ed74f10a60e11a5514e3f1040125648a1 /gcc/value-range.h | |
| parent | 041812f584a1c82f1255bd96f3503493bd9fb127 (diff) | |
| download | gcc-2b61ed838c7f3f4bf54d4530c0f053b420623beb.zip gcc-2b61ed838c7f3f4bf54d4530c0f053b420623beb.tar.gz gcc-2b61ed838c7f3f4bf54d4530c0f053b420623beb.tar.bz2 | |
frange: flush denormals to zero
For some architectures (or for -funsafe-math-optimizations) we may
flush denormals to zero, in which case we need to be careful to
extend the ranges to the appropriate zero. This patch does exactly that.
For a range of [x, -DENORMAL] we flush to [x, -0.0] and for [+DENORMAL, x]
we flush to [+0.0, x].
gcc/ChangeLog:
* value-range.cc (frange::flush_denormals_to_zero): New.
(frange::set): Call flush_denormals_to_zero.
* value-range.h (class frange): Add flush_denormals_to_zero.
Diffstat (limited to 'gcc/value-range.h')
| -rw-r--r-- | gcc/value-range.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/value-range.h b/gcc/value-range.h index 3a401f3..795b1f0 100644 --- a/gcc/value-range.h +++ b/gcc/value-range.h @@ -327,6 +327,7 @@ private: bool union_nans (const frange &); bool intersect_nans (const frange &); bool combine_zeros (const frange &, bool union_p); + void flush_denormals_to_zero (); tree m_type; REAL_VALUE_TYPE m_min; |