From 06307f1b86c619b87494c573eb54342a25778d71 Mon Sep 17 00:00:00 2001 From: chengbin Date: Thu, 1 Nov 2018 12:12:44 +0800 Subject: [PATCH 2/5] Dont invert uninitialized value --- gcc/profile-count.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/gcc/profile-count.h b/gcc/profile-count.h index f4d0c340a0a..4289bc5a004 100644 --- a/gcc/profile-count.h +++ b/gcc/profile-count.h @@ -200,11 +200,11 @@ public: ret.m_quality = profile_guessed; return ret; } - static profile_probability always () + static profile_probability always (enum profile_quality q = profile_precise) { profile_probability ret; ret.m_val = max_probability; - ret.m_quality = profile_precise; + ret.m_quality = q; return ret; } /* Probabilities which has not been initialized. Either because @@ -459,10 +459,12 @@ public: return RDIV (val * m_val, max_probability); } - /* Return 1-*THIS. */ + /* Return 1-*THIS. It's meaningless to invert an uninitialized value. */ profile_probability invert () const { - return profile_probability::always() - *this; + if (! initialized_p ()) + return *this; + return profile_probability::always (m_quality) - *this; } /* Return THIS with quality dropped to GUESSED. */ -- 2.14.4.44.g2045bb6