http://llvm.org/bugs/show_bug.cgi?id=21726
Bug ID: 21726
Summary: -Wundefined-bool-conversion not raised in all cases
where optimization is applied
Product: clang
Version: 3.5
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Hi,
in function indirect() below, no warning for the check of the address of the
reference is raised, but the check is still optimized out at -O1. This is a big
problem for codebases that have such constructs, since it can be hard to track
down the resulting errors at runtime. direct() raises the warning as expected.
int indirect()
{
int a = 42;
int &r = a;
int *p = &r;
if (p) // no warning!
return 0;
else
return 1;
}
int direct()
{
int a = 42;
int &r = a;
if (&r) // -Wundefined-bool-conversion
return 0;
else
return 1;
}
Best regards,
Martin
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