https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127902
Bug ID: 127902
Summary: clang warning -Wsometimes-uninitialized for
tree-ssa-forwprop.cc:3526:
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Today's build of gcc trunk with clang says:
trunk/gcc/tree-ssa-forwprop.cc:3526:12: warning: variable 'zero_ok' is use
d uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
Source code is
bool zero_ok;
if (fn == IFN_CTZ)
{
ctz_val = 0;
zero_ok = CTZ_DEFINED_VALUE_AT_ZERO (SCALAR_INT_TYPE_MODE (input_type),
ctz_val) == 2;
}
else if (fn == IFN_CLZ)
{
ctz_val = 32;
zero_ok = CLZ_DEFINED_VALUE_AT_ZERO (SCALAR_INT_TYPE_MODE (input_type),
ctz_val) == 2;
zero_val = input_bits - 1 - zero_val;
}
Suggest either add an initialiser for zero_ok or provide
an else clause.
