https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103899
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization,
| |needs-bisection
Host|x86_64-linux-gnu |
Component|bootstrap |tree-optimization
Build|x86_64-linux-gnu |
Summary|make profiledbootstrap |[12 Regression] make
|fails due to uninitialized |profiledbootstrap fails due
|warning in expr.c |to uninitialized warning in
| |expr.c
Target Milestone|--- |12.0
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
int h;
int l ();
int *k ();
void nn ();
void expand_expr_real_1 (int *exp)
{
int m;
int *context;
m = 2;
if (h || !exp)
m = l ();
if (exp)
context = k ();
if (exp && context && context[0] == 0)
if (m == 0)
nn ();
}
----- CUT ----
Compile with "-O2 -W -Wall -Werror", there is no warning but once you add
-fprofile-generate there is an uninitialized warning for context.
There is a missing jump threading on the trunk which is causing the warning to
show up.
