* Fix profile_count::to_sreal_scale
@ 2023-07-26 7:01 Jan Hubicka
0 siblings, 0 replies; only message in thread
From: Jan Hubicka @ 2023-07-26 7:01 UTC (permalink / raw)
To: gcc-patches
Hi,
this patch makes profile_count::to_sreal_scale consider the scale
unknown when in is 0. This fixes the case where loop has 0 executions
in profile feedback and thus we can't determine its trip count.
Bootstrapped/regtested x86_64-linux, comitted.
Honza
gcc/ChangeLog:
* profile-count.cc (profile_count::to_sreal_scale): Value is not know
if we divide by zero.
diff --git a/gcc/profile-count.cc b/gcc/profile-count.cc
index 2c07ebc5942..eaf0f0d787e 100644
--- a/gcc/profile-count.cc
+++ b/gcc/profile-count.cc
@@ -345,7 +345,7 @@ profile_count::to_sreal_scale (profile_count in, bool *known) const
return 1;
}
if (known)
- *known = true;
+ *known = in.m_val != 0;
if (*this == in)
return 1;
gcc_checking_assert (compatible_p (in));
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